Commit | Line | Data |
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1da177e4 LT |
1 | #ifndef _LINUX_TTY_H |
2 | #define _LINUX_TTY_H | |
3 | ||
4 | /* | |
5 | * 'tty.h' defines some structures used by tty_io.c and some defines. | |
6 | */ | |
7 | ||
1da177e4 | 8 | #ifdef __KERNEL__ |
1da177e4 LT |
9 | #include <linux/fs.h> |
10 | #include <linux/major.h> | |
11 | #include <linux/termios.h> | |
12 | #include <linux/workqueue.h> | |
13 | #include <linux/tty_driver.h> | |
14 | #include <linux/tty_ldisc.h> | |
70522e12 | 15 | #include <linux/mutex.h> |
1da177e4 LT |
16 | |
17 | #include <asm/system.h> | |
18 | ||
19 | ||
20 | /* | |
21 | * (Note: the *_driver.minor_start values 1, 64, 128, 192 are | |
22 | * hardcoded at present.) | |
23 | */ | |
1da177e4 LT |
24 | #define NR_UNIX98_PTY_DEFAULT 4096 /* Default maximum for Unix98 ptys */ |
25 | #define NR_UNIX98_PTY_MAX (1 << MINORBITS) /* Absolute limit */ | |
1ff454ef | 26 | #define NR_LDISCS 30 |
4564f9e5 TS |
27 | |
28 | /* line disciplines */ | |
29 | #define N_TTY 0 | |
30 | #define N_SLIP 1 | |
31 | #define N_MOUSE 2 | |
32 | #define N_PPP 3 | |
33 | #define N_STRIP 4 | |
34 | #define N_AX25 5 | |
35 | #define N_X25 6 /* X.25 async */ | |
36 | #define N_6PACK 7 | |
37 | #define N_MASC 8 /* Reserved for Mobitex module <kaz@cafe.net> */ | |
38 | #define N_R3964 9 /* Reserved for Simatic R3964 module */ | |
44d1b980 | 39 | #define N_PROFIBUS_FDL 10 /* Reserved for Profibus */ |
4564f9e5 TS |
40 | #define N_IRDA 11 /* Linux IrDa - http://irda.sourceforge.net/ */ |
41 | #define N_SMSBLOCK 12 /* SMS block mode - for talking to GSM data */ | |
42 | /* cards about SMS messages */ | |
43 | #define N_HDLC 13 /* synchronous HDLC */ | |
44 | #define N_SYNC_PPP 14 /* synchronous PPP */ | |
45 | #define N_HCI 15 /* Bluetooth HCI UART */ | |
46 | #define N_GIGASET_M101 16 /* Siemens Gigaset M101 serial DECT adapter */ | |
cd05acfe | 47 | #define N_SLCAN 17 /* Serial / USB serial CAN Adaptors */ |
348eb12e | 48 | #define N_PPS 18 /* Pulse per Second */ |
b7b8f9bf | 49 | #define N_V253 19 /* Codec control over voice modem */ |
9b27105b | 50 | #define N_CAIF 20 /* CAIF protocol for talking to modems */ |
e1eaea46 | 51 | #define N_GSM0710 21 /* GSM 0710 Mux */ |
65f8e441 | 52 | #define N_TI_WL 22 /* for TI's WL BT, FM, GPS combo chips */ |
ee4f6b4b F |
53 | #define N_TRACESINK 23 /* Trace data routing for MIPI P1149.7 */ |
54 | #define N_TRACEROUTER 24 /* Trace data routing for MIPI P1149.7 */ | |
78ed73e8 | 55 | |
1da177e4 LT |
56 | /* |
57 | * This character is the same as _POSIX_VDISABLE: it cannot be used as | |
58 | * a c_cc[] character, but indicates that a particular special character | |
59 | * isn't in use (eg VINTR has no character etc) | |
60 | */ | |
61 | #define __DISABLED_CHAR '\0' | |
62 | ||
33f0f88f AC |
63 | struct tty_buffer { |
64 | struct tty_buffer *next; | |
65 | char *char_buf_ptr; | |
66 | unsigned char *flag_buf_ptr; | |
67 | int used; | |
68 | int size; | |
8977d929 PF |
69 | int commit; |
70 | int read; | |
33f0f88f AC |
71 | /* Data points here */ |
72 | unsigned long data[0]; | |
73 | }; | |
74 | ||
d9661adf AC |
75 | /* |
76 | * We default to dicing tty buffer allocations to this many characters | |
352fa6ad MG |
77 | * in order to avoid multiple page allocations. We know the size of |
78 | * tty_buffer itself but it must also be taken into account that the | |
79 | * the buffer is 256 byte aligned. See tty_buffer_find for the allocation | |
80 | * logic this must match | |
d9661adf AC |
81 | */ |
82 | ||
352fa6ad | 83 | #define TTY_BUFFER_PAGE (((PAGE_SIZE - sizeof(struct tty_buffer)) / 2) & ~0xFF) |
d9661adf AC |
84 | |
85 | ||
33f0f88f | 86 | struct tty_bufhead { |
f23eb2b2 | 87 | struct work_struct work; |
808249ce | 88 | spinlock_t lock; |
33f0f88f AC |
89 | struct tty_buffer *head; /* Queue head */ |
90 | struct tty_buffer *tail; /* Active buffer */ | |
91 | struct tty_buffer *free; /* Free queue head */ | |
7a4d29f4 AC |
92 | int memory_used; /* Buffer space used excluding |
93 | free queue */ | |
1da177e4 | 94 | }; |
1da177e4 LT |
95 | /* |
96 | * When a break, frame error, or parity error happens, these codes are | |
97 | * stuffed into the flags buffer. | |
98 | */ | |
99 | #define TTY_NORMAL 0 | |
100 | #define TTY_BREAK 1 | |
101 | #define TTY_FRAME 2 | |
102 | #define TTY_PARITY 3 | |
103 | #define TTY_OVERRUN 4 | |
104 | ||
105 | #define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR]) | |
106 | #define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT]) | |
107 | #define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE]) | |
108 | #define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL]) | |
109 | #define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF]) | |
110 | #define TIME_CHAR(tty) ((tty)->termios->c_cc[VTIME]) | |
111 | #define MIN_CHAR(tty) ((tty)->termios->c_cc[VMIN]) | |
112 | #define SWTC_CHAR(tty) ((tty)->termios->c_cc[VSWTC]) | |
113 | #define START_CHAR(tty) ((tty)->termios->c_cc[VSTART]) | |
114 | #define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP]) | |
115 | #define SUSP_CHAR(tty) ((tty)->termios->c_cc[VSUSP]) | |
116 | #define EOL_CHAR(tty) ((tty)->termios->c_cc[VEOL]) | |
117 | #define REPRINT_CHAR(tty) ((tty)->termios->c_cc[VREPRINT]) | |
118 | #define DISCARD_CHAR(tty) ((tty)->termios->c_cc[VDISCARD]) | |
119 | #define WERASE_CHAR(tty) ((tty)->termios->c_cc[VWERASE]) | |
120 | #define LNEXT_CHAR(tty) ((tty)->termios->c_cc[VLNEXT]) | |
121 | #define EOL2_CHAR(tty) ((tty)->termios->c_cc[VEOL2]) | |
122 | ||
7a4d29f4 AC |
123 | #define _I_FLAG(tty, f) ((tty)->termios->c_iflag & (f)) |
124 | #define _O_FLAG(tty, f) ((tty)->termios->c_oflag & (f)) | |
125 | #define _C_FLAG(tty, f) ((tty)->termios->c_cflag & (f)) | |
126 | #define _L_FLAG(tty, f) ((tty)->termios->c_lflag & (f)) | |
127 | ||
128 | #define I_IGNBRK(tty) _I_FLAG((tty), IGNBRK) | |
129 | #define I_BRKINT(tty) _I_FLAG((tty), BRKINT) | |
130 | #define I_IGNPAR(tty) _I_FLAG((tty), IGNPAR) | |
131 | #define I_PARMRK(tty) _I_FLAG((tty), PARMRK) | |
132 | #define I_INPCK(tty) _I_FLAG((tty), INPCK) | |
133 | #define I_ISTRIP(tty) _I_FLAG((tty), ISTRIP) | |
134 | #define I_INLCR(tty) _I_FLAG((tty), INLCR) | |
135 | #define I_IGNCR(tty) _I_FLAG((tty), IGNCR) | |
136 | #define I_ICRNL(tty) _I_FLAG((tty), ICRNL) | |
137 | #define I_IUCLC(tty) _I_FLAG((tty), IUCLC) | |
138 | #define I_IXON(tty) _I_FLAG((tty), IXON) | |
139 | #define I_IXANY(tty) _I_FLAG((tty), IXANY) | |
140 | #define I_IXOFF(tty) _I_FLAG((tty), IXOFF) | |
141 | #define I_IMAXBEL(tty) _I_FLAG((tty), IMAXBEL) | |
142 | #define I_IUTF8(tty) _I_FLAG((tty), IUTF8) | |
143 | ||
144 | #define O_OPOST(tty) _O_FLAG((tty), OPOST) | |
145 | #define O_OLCUC(tty) _O_FLAG((tty), OLCUC) | |
146 | #define O_ONLCR(tty) _O_FLAG((tty), ONLCR) | |
147 | #define O_OCRNL(tty) _O_FLAG((tty), OCRNL) | |
148 | #define O_ONOCR(tty) _O_FLAG((tty), ONOCR) | |
149 | #define O_ONLRET(tty) _O_FLAG((tty), ONLRET) | |
150 | #define O_OFILL(tty) _O_FLAG((tty), OFILL) | |
151 | #define O_OFDEL(tty) _O_FLAG((tty), OFDEL) | |
152 | #define O_NLDLY(tty) _O_FLAG((tty), NLDLY) | |
153 | #define O_CRDLY(tty) _O_FLAG((tty), CRDLY) | |
154 | #define O_TABDLY(tty) _O_FLAG((tty), TABDLY) | |
155 | #define O_BSDLY(tty) _O_FLAG((tty), BSDLY) | |
156 | #define O_VTDLY(tty) _O_FLAG((tty), VTDLY) | |
157 | #define O_FFDLY(tty) _O_FLAG((tty), FFDLY) | |
158 | ||
159 | #define C_BAUD(tty) _C_FLAG((tty), CBAUD) | |
160 | #define C_CSIZE(tty) _C_FLAG((tty), CSIZE) | |
161 | #define C_CSTOPB(tty) _C_FLAG((tty), CSTOPB) | |
162 | #define C_CREAD(tty) _C_FLAG((tty), CREAD) | |
163 | #define C_PARENB(tty) _C_FLAG((tty), PARENB) | |
164 | #define C_PARODD(tty) _C_FLAG((tty), PARODD) | |
165 | #define C_HUPCL(tty) _C_FLAG((tty), HUPCL) | |
166 | #define C_CLOCAL(tty) _C_FLAG((tty), CLOCAL) | |
167 | #define C_CIBAUD(tty) _C_FLAG((tty), CIBAUD) | |
168 | #define C_CRTSCTS(tty) _C_FLAG((tty), CRTSCTS) | |
169 | ||
170 | #define L_ISIG(tty) _L_FLAG((tty), ISIG) | |
171 | #define L_ICANON(tty) _L_FLAG((tty), ICANON) | |
172 | #define L_XCASE(tty) _L_FLAG((tty), XCASE) | |
173 | #define L_ECHO(tty) _L_FLAG((tty), ECHO) | |
174 | #define L_ECHOE(tty) _L_FLAG((tty), ECHOE) | |
175 | #define L_ECHOK(tty) _L_FLAG((tty), ECHOK) | |
176 | #define L_ECHONL(tty) _L_FLAG((tty), ECHONL) | |
177 | #define L_NOFLSH(tty) _L_FLAG((tty), NOFLSH) | |
178 | #define L_TOSTOP(tty) _L_FLAG((tty), TOSTOP) | |
179 | #define L_ECHOCTL(tty) _L_FLAG((tty), ECHOCTL) | |
180 | #define L_ECHOPRT(tty) _L_FLAG((tty), ECHOPRT) | |
181 | #define L_ECHOKE(tty) _L_FLAG((tty), ECHOKE) | |
182 | #define L_FLUSHO(tty) _L_FLAG((tty), FLUSHO) | |
183 | #define L_PENDIN(tty) _L_FLAG((tty), PENDIN) | |
184 | #define L_IEXTEN(tty) _L_FLAG((tty), IEXTEN) | |
26df6d13 | 185 | #define L_EXTPROC(tty) _L_FLAG((tty), EXTPROC) |
1da177e4 LT |
186 | |
187 | struct device; | |
522ed776 | 188 | struct signal_struct; |
6f67048c AC |
189 | |
190 | /* | |
191 | * Port level information. Each device keeps its own port level information | |
192 | * so provide a common structure for those ports wanting to use common support | |
193 | * routines. | |
194 | * | |
195 | * The tty port has a different lifetime to the tty so must be kept apart. | |
196 | * In addition be careful as tty -> port mappings are valid for the life | |
197 | * of the tty object but in many cases port -> tty mappings are valid only | |
198 | * until a hangup so don't use the wrong path. | |
199 | */ | |
7a4d29f4 | 200 | |
31f35939 AC |
201 | struct tty_port; |
202 | ||
203 | struct tty_port_operations { | |
204 | /* Return 1 if the carrier is raised */ | |
205 | int (*carrier_raised)(struct tty_port *port); | |
7ca0ff9a | 206 | /* Control the DTR line */ |
fcc8ac18 | 207 | void (*dtr_rts)(struct tty_port *port, int raise); |
7ca0ff9a | 208 | /* Called when the last close completes or a hangup finishes |
64bc3979 AC |
209 | IFF the port was initialized. Do not use to free resources. Called |
210 | under the port mutex to serialize against activate/shutdowns */ | |
7ca0ff9a AC |
211 | void (*shutdown)(struct tty_port *port); |
212 | void (*drop)(struct tty_port *port); | |
64bc3979 AC |
213 | /* Called under the port mutex from tty_port_open, serialized using |
214 | the port mutex */ | |
215 | /* FIXME: long term getting the tty argument *out* of this would be | |
216 | good for consoles */ | |
217 | int (*activate)(struct tty_port *port, struct tty_struct *tty); | |
568aafc6 AC |
218 | /* Called on the final put of a port */ |
219 | void (*destruct)(struct tty_port *port); | |
31f35939 AC |
220 | }; |
221 | ||
6f67048c AC |
222 | struct tty_port { |
223 | struct tty_struct *tty; /* Back pointer */ | |
31f35939 | 224 | const struct tty_port_operations *ops; /* Port operations */ |
4a90f09b | 225 | spinlock_t lock; /* Lock protecting tty field */ |
6f67048c AC |
226 | int blocked_open; /* Waiting to open */ |
227 | int count; /* Usage count */ | |
228 | wait_queue_head_t open_wait; /* Open waiters */ | |
229 | wait_queue_head_t close_wait; /* Close waiters */ | |
bdc04e31 | 230 | wait_queue_head_t delta_msr_wait; /* Modem status change */ |
6f67048c | 231 | unsigned long flags; /* TTY flags ASY_*/ |
336cee42 | 232 | unsigned char console:1; /* port is a console */ |
6f67048c | 233 | struct mutex mutex; /* Locking */ |
44e4909e | 234 | struct mutex buf_mutex; /* Buffer alloc lock */ |
6f67048c | 235 | unsigned char *xmit_buf; /* Optional buffer */ |
5e99df56 AC |
236 | unsigned int close_delay; /* Close port delay */ |
237 | unsigned int closing_wait; /* Delay for output */ | |
1ec739be AC |
238 | int drain_delay; /* Set to zero if no pure time |
239 | based drain is needed else | |
240 | set to size of fifo */ | |
568aafc6 | 241 | struct kref kref; /* Ref counter */ |
6f67048c AC |
242 | }; |
243 | ||
1da177e4 LT |
244 | /* |
245 | * Where all of the state associated with a tty is kept while the tty | |
246 | * is open. Since the termios state should be kept even if the tty | |
247 | * has been closed --- for things like the baud rate, etc --- it is | |
248 | * not stored here, but rather a pointer to the real state is stored | |
249 | * here. Possible the winsize structure should have the same | |
250 | * treatment, but (1) the default 80x24 is usually right and (2) it's | |
251 | * most often used by a windowing system, which will set the correct | |
252 | * size each time the window is created or resized anyway. | |
253 | * - TYT, 9/14/92 | |
254 | */ | |
f34d7a5b AC |
255 | |
256 | struct tty_operations; | |
257 | ||
1da177e4 LT |
258 | struct tty_struct { |
259 | int magic; | |
9c9f4ded | 260 | struct kref kref; |
30004ac9 | 261 | struct device *dev; |
1da177e4 | 262 | struct tty_driver *driver; |
f34d7a5b | 263 | const struct tty_operations *ops; |
1da177e4 | 264 | int index; |
c65c9bc3 AC |
265 | |
266 | /* Protects ldisc changes: Lock tty not pty */ | |
267 | struct mutex ldisc_mutex; | |
268 | struct tty_ldisc *ldisc; | |
269 | ||
5785c95b | 270 | struct mutex termios_mutex; |
04f378b1 | 271 | spinlock_t ctrl_lock; |
47f86834 | 272 | /* Termios values are protected by the termios mutex */ |
edc6afc5 | 273 | struct ktermios *termios, *termios_locked; |
1d65b4a0 | 274 | struct termiox *termiox; /* May be NULL for unsupported */ |
1da177e4 | 275 | char name[64]; |
47f86834 | 276 | struct pid *pgrp; /* Protected by ctrl lock */ |
ab521dc0 | 277 | struct pid *session; |
1da177e4 LT |
278 | unsigned long flags; |
279 | int count; | |
47f86834 | 280 | struct winsize winsize; /* termios mutex */ |
1da177e4 LT |
281 | unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1; |
282 | unsigned char low_latency:1, warned:1; | |
47f86834 | 283 | unsigned char ctrl_status; /* ctrl_lock */ |
33f0f88f | 284 | unsigned int receive_room; /* Bytes free for queue */ |
1da177e4 LT |
285 | |
286 | struct tty_struct *link; | |
287 | struct fasync_struct *fasync; | |
47f86834 | 288 | struct tty_bufhead buf; /* Locked internally */ |
1da177e4 LT |
289 | int alt_speed; /* For magic substitution of 38400 bps */ |
290 | wait_queue_head_t write_wait; | |
291 | wait_queue_head_t read_wait; | |
292 | struct work_struct hangup_work; | |
293 | void *disc_data; | |
294 | void *driver_data; | |
295 | struct list_head tty_files; | |
296 | ||
297 | #define N_TTY_BUF_SIZE 4096 | |
6f67048c | 298 | |
1da177e4 LT |
299 | /* |
300 | * The following is data for the N_TTY line discipline. For | |
301 | * historical reasons, this is included in the tty structure. | |
47f86834 | 302 | * Mostly locked by the BKL. |
1da177e4 LT |
303 | */ |
304 | unsigned int column; | |
305 | unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1; | |
306 | unsigned char closing:1; | |
a88a69c9 | 307 | unsigned char echo_overrun:1; |
1da177e4 LT |
308 | unsigned short minimum_to_wake; |
309 | unsigned long overrun_time; | |
310 | int num_overrun; | |
311 | unsigned long process_char_map[256/(8*sizeof(unsigned long))]; | |
312 | char *read_buf; | |
313 | int read_head; | |
314 | int read_tail; | |
315 | int read_cnt; | |
316 | unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))]; | |
a88a69c9 JP |
317 | unsigned char *echo_buf; |
318 | unsigned int echo_pos; | |
319 | unsigned int echo_cnt; | |
1da177e4 LT |
320 | int canon_data; |
321 | unsigned long canon_head; | |
322 | unsigned int canon_column; | |
70522e12 IM |
323 | struct mutex atomic_read_lock; |
324 | struct mutex atomic_write_lock; | |
a88a69c9 JP |
325 | struct mutex output_lock; |
326 | struct mutex echo_lock; | |
1da177e4 LT |
327 | unsigned char *write_buf; |
328 | int write_cnt; | |
329 | spinlock_t read_lock; | |
330 | /* If the tty has a pending do_SAK, queue it here - akpm */ | |
331 | struct work_struct SAK_work; | |
6f67048c | 332 | struct tty_port *port; |
1da177e4 LT |
333 | }; |
334 | ||
d996b62a NP |
335 | /* Each of a tty's open files has private_data pointing to tty_file_private */ |
336 | struct tty_file_private { | |
337 | struct tty_struct *tty; | |
338 | struct file *file; | |
339 | struct list_head list; | |
340 | }; | |
341 | ||
1da177e4 LT |
342 | /* tty magic number */ |
343 | #define TTY_MAGIC 0x5401 | |
344 | ||
345 | /* | |
346 | * These bits are used in the flags field of the tty structure. | |
7a4d29f4 | 347 | * |
1da177e4 LT |
348 | * So that interrupts won't be able to mess up the queues, |
349 | * copy_to_cooked must be atomic with respect to itself, as must | |
350 | * tty->write. Thus, you must use the inline functions set_bit() and | |
351 | * clear_bit() to make things atomic. | |
352 | */ | |
353 | #define TTY_THROTTLED 0 /* Call unthrottle() at threshold min */ | |
7a4d29f4 | 354 | #define TTY_IO_ERROR 1 /* Cause an I/O error (may be no ldisc too) */ |
1da177e4 LT |
355 | #define TTY_OTHER_CLOSED 2 /* Other side (if any) has closed */ |
356 | #define TTY_EXCLUSIVE 3 /* Exclusive open mode */ | |
357 | #define TTY_DEBUG 4 /* Debugging */ | |
358 | #define TTY_DO_WRITE_WAKEUP 5 /* Call write_wakeup after queuing new */ | |
359 | #define TTY_PUSH 6 /* n_tty private */ | |
360 | #define TTY_CLOSING 7 /* ->close() in progress */ | |
1da177e4 | 361 | #define TTY_LDISC 9 /* Line discipline attached */ |
c9b3976e | 362 | #define TTY_LDISC_CHANGING 10 /* Line discipline changing */ |
c65c9bc3 | 363 | #define TTY_LDISC_OPEN 11 /* Line discipline is open */ |
1da177e4 LT |
364 | #define TTY_HW_COOK_OUT 14 /* Hardware can do output cooking */ |
365 | #define TTY_HW_COOK_IN 15 /* Hardware can do input cooking */ | |
366 | #define TTY_PTY_LOCK 16 /* pty private */ | |
367 | #define TTY_NO_WRITE_SPLIT 17 /* Preserve write boundaries to driver */ | |
368 | #define TTY_HUPPED 18 /* Post driver->hangup() */ | |
42fd552e AC |
369 | #define TTY_FLUSHING 19 /* Flushing to ldisc in progress */ |
370 | #define TTY_FLUSHPENDING 20 /* Queued buffer flush pending */ | |
acfa747b | 371 | #define TTY_HUPPING 21 /* ->hangup() in progress */ |
1da177e4 LT |
372 | |
373 | #define TTY_WRITE_FLUSH(tty) tty_write_flush((tty)) | |
374 | ||
375 | extern void tty_write_flush(struct tty_struct *); | |
376 | ||
edc6afc5 | 377 | extern struct ktermios tty_std_termios; |
1da177e4 | 378 | |
1da177e4 LT |
379 | extern void console_init(void); |
380 | extern int vcs_init(void); | |
381 | ||
d81ed103 AC |
382 | extern struct class *tty_class; |
383 | ||
9c9f4ded AC |
384 | /** |
385 | * tty_kref_get - get a tty reference | |
386 | * @tty: tty device | |
387 | * | |
388 | * Return a new reference to a tty object. The caller must hold | |
389 | * sufficient locks/counts to ensure that their existing reference cannot | |
390 | * go away | |
391 | */ | |
392 | ||
14bfc987 | 393 | static inline struct tty_struct *tty_kref_get(struct tty_struct *tty) |
9c9f4ded AC |
394 | { |
395 | if (tty) | |
396 | kref_get(&tty->kref); | |
397 | return tty; | |
398 | } | |
399 | extern void tty_kref_put(struct tty_struct *tty); | |
400 | ||
1da177e4 LT |
401 | extern int tty_paranoia_check(struct tty_struct *tty, struct inode *inode, |
402 | const char *routine); | |
403 | extern char *tty_name(struct tty_struct *tty, char *buf); | |
7a4d29f4 AC |
404 | extern void tty_wait_until_sent(struct tty_struct *tty, long timeout); |
405 | extern int tty_check_change(struct tty_struct *tty); | |
406 | extern void stop_tty(struct tty_struct *tty); | |
407 | extern void start_tty(struct tty_struct *tty); | |
1da177e4 LT |
408 | extern int tty_register_driver(struct tty_driver *driver); |
409 | extern int tty_unregister_driver(struct tty_driver *driver); | |
01107d34 GKH |
410 | extern struct device *tty_register_device(struct tty_driver *driver, |
411 | unsigned index, struct device *dev); | |
1da177e4 LT |
412 | extern void tty_unregister_device(struct tty_driver *driver, unsigned index); |
413 | extern int tty_read_raw_data(struct tty_struct *tty, unsigned char *bufp, | |
414 | int buflen); | |
415 | extern void tty_write_message(struct tty_struct *tty, char *msg); | |
f34d7a5b AC |
416 | extern int tty_put_char(struct tty_struct *tty, unsigned char c); |
417 | extern int tty_chars_in_buffer(struct tty_struct *tty); | |
418 | extern int tty_write_room(struct tty_struct *tty); | |
419 | extern void tty_driver_flush_buffer(struct tty_struct *tty); | |
39c2e60f AC |
420 | extern void tty_throttle(struct tty_struct *tty); |
421 | extern void tty_unthrottle(struct tty_struct *tty); | |
fc6f6238 | 422 | extern int tty_do_resize(struct tty_struct *tty, struct winsize *ws); |
feebed65 AC |
423 | extern void tty_shutdown(struct tty_struct *tty); |
424 | extern void tty_free_termios(struct tty_struct *tty); | |
3e7cd6c4 | 425 | extern int is_current_pgrp_orphaned(void); |
5d0fdf1e | 426 | extern struct pid *tty_get_pgrp(struct tty_struct *tty); |
1da177e4 LT |
427 | extern int is_ignored(int sig); |
428 | extern int tty_signal(int sig, struct tty_struct *tty); | |
7a4d29f4 AC |
429 | extern void tty_hangup(struct tty_struct *tty); |
430 | extern void tty_vhangup(struct tty_struct *tty); | |
ddcd9fb6 | 431 | extern void tty_vhangup_locked(struct tty_struct *tty); |
2cb5998b | 432 | extern void tty_vhangup_self(void); |
1da177e4 | 433 | extern void tty_unhangup(struct file *filp); |
7a4d29f4 | 434 | extern int tty_hung_up_p(struct file *filp); |
1da177e4 | 435 | extern void do_SAK(struct tty_struct *tty); |
8b6312f4 | 436 | extern void __do_SAK(struct tty_struct *tty); |
1da177e4 | 437 | extern void disassociate_ctty(int priv); |
98a27ba4 | 438 | extern void no_tty(void); |
1da177e4 | 439 | extern void tty_flip_buffer_push(struct tty_struct *tty); |
e043e42b | 440 | extern void tty_flush_to_ldisc(struct tty_struct *tty); |
e0495736 AC |
441 | extern void tty_buffer_free_all(struct tty_struct *tty); |
442 | extern void tty_buffer_flush(struct tty_struct *tty); | |
443 | extern void tty_buffer_init(struct tty_struct *tty); | |
edc6afc5 AC |
444 | extern speed_t tty_get_baud_rate(struct tty_struct *tty); |
445 | extern speed_t tty_termios_baud_rate(struct ktermios *termios); | |
446 | extern speed_t tty_termios_input_baud_rate(struct ktermios *termios); | |
7a4d29f4 AC |
447 | extern void tty_termios_encode_baud_rate(struct ktermios *termios, |
448 | speed_t ibaud, speed_t obaud); | |
449 | extern void tty_encode_baud_rate(struct tty_struct *tty, | |
450 | speed_t ibaud, speed_t obaud); | |
5f519d72 | 451 | extern void tty_termios_copy_hw(struct ktermios *new, struct ktermios *old); |
bf5e5834 | 452 | extern int tty_termios_hw_change(struct ktermios *a, struct ktermios *b); |
8d075b19 | 453 | extern int tty_set_termios(struct tty_struct *tty, struct ktermios *kt); |
1da177e4 LT |
454 | |
455 | extern struct tty_ldisc *tty_ldisc_ref(struct tty_struct *); | |
456 | extern void tty_ldisc_deref(struct tty_ldisc *); | |
457 | extern struct tty_ldisc *tty_ldisc_ref_wait(struct tty_struct *); | |
c65c9bc3 | 458 | extern void tty_ldisc_hangup(struct tty_struct *tty); |
a352def2 | 459 | extern const struct file_operations tty_ldiscs_proc_fops; |
1da177e4 LT |
460 | |
461 | extern void tty_wakeup(struct tty_struct *tty); | |
462 | extern void tty_ldisc_flush(struct tty_struct *tty); | |
463 | ||
04f378b1 | 464 | extern long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
0fc00e24 AC |
465 | extern int tty_mode_ioctl(struct tty_struct *tty, struct file *file, |
466 | unsigned int cmd, unsigned long arg); | |
467 | extern int tty_perform_flush(struct tty_struct *tty, unsigned long arg); | |
24ec839c PZ |
468 | extern dev_t tty_devnum(struct tty_struct *tty); |
469 | extern void proc_clear_tty(struct task_struct *p); | |
24ec839c | 470 | extern struct tty_struct *get_current_tty(void); |
d81ed103 | 471 | extern void tty_default_fops(struct file_operations *fops); |
bf970ee4 | 472 | extern struct tty_struct *alloc_tty_struct(void); |
f573bd17 | 473 | extern int tty_add_file(struct tty_struct *tty, struct file *file); |
bf970ee4 AC |
474 | extern void free_tty_struct(struct tty_struct *tty); |
475 | extern void initialize_tty_struct(struct tty_struct *tty, | |
476 | struct tty_driver *driver, int idx); | |
6716671d | 477 | extern void deinitialize_tty_struct(struct tty_struct *tty); |
73ec06fc AC |
478 | extern struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx, |
479 | int first_ok); | |
eeb89d91 | 480 | extern int tty_release(struct inode *inode, struct file *filp); |
bf970ee4 | 481 | extern int tty_init_termios(struct tty_struct *tty); |
24ec839c | 482 | |
e8b70e7d AC |
483 | extern struct tty_struct *tty_pair_get_tty(struct tty_struct *tty); |
484 | extern struct tty_struct *tty_pair_get_pty(struct tty_struct *tty); | |
485 | ||
70522e12 | 486 | extern struct mutex tty_mutex; |
ee2ffa0d | 487 | extern spinlock_t tty_files_lock; |
1da177e4 | 488 | |
9c1729db AC |
489 | extern void tty_write_unlock(struct tty_struct *tty); |
490 | extern int tty_write_lock(struct tty_struct *tty, int ndelay); | |
491 | #define tty_is_writelocked(tty) (mutex_is_locked(&tty->atomic_write_lock)) | |
492 | ||
6f67048c AC |
493 | extern void tty_port_init(struct tty_port *port); |
494 | extern int tty_port_alloc_xmit_buf(struct tty_port *port); | |
495 | extern void tty_port_free_xmit_buf(struct tty_port *port); | |
568aafc6 AC |
496 | extern void tty_port_put(struct tty_port *port); |
497 | ||
2427b8e3 | 498 | static inline struct tty_port *tty_port_get(struct tty_port *port) |
568aafc6 AC |
499 | { |
500 | if (port) | |
501 | kref_get(&port->kref); | |
502 | return port; | |
503 | } | |
504 | ||
4a90f09b AC |
505 | extern struct tty_struct *tty_port_tty_get(struct tty_port *port); |
506 | extern void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty); | |
31f35939 | 507 | extern int tty_port_carrier_raised(struct tty_port *port); |
5d951fb4 | 508 | extern void tty_port_raise_dtr_rts(struct tty_port *port); |
fcc8ac18 | 509 | extern void tty_port_lower_dtr_rts(struct tty_port *port); |
3e61696b | 510 | extern void tty_port_hangup(struct tty_port *port); |
36c621d8 AC |
511 | extern int tty_port_block_til_ready(struct tty_port *port, |
512 | struct tty_struct *tty, struct file *filp); | |
a6614999 AC |
513 | extern int tty_port_close_start(struct tty_port *port, |
514 | struct tty_struct *tty, struct file *filp); | |
515 | extern void tty_port_close_end(struct tty_port *port, struct tty_struct *tty); | |
7ca0ff9a AC |
516 | extern void tty_port_close(struct tty_port *port, |
517 | struct tty_struct *tty, struct file *filp); | |
64bc3979 AC |
518 | extern int tty_port_open(struct tty_port *port, |
519 | struct tty_struct *tty, struct file *filp); | |
2427b8e3 | 520 | static inline int tty_port_users(struct tty_port *port) |
b58d13a0 AC |
521 | { |
522 | return port->count + port->blocked_open; | |
523 | } | |
524 | ||
01e1abb2 AC |
525 | extern int tty_register_ldisc(int disc, struct tty_ldisc_ops *new_ldisc); |
526 | extern int tty_unregister_ldisc(int disc); | |
527 | extern int tty_set_ldisc(struct tty_struct *tty, int ldisc); | |
528 | extern int tty_ldisc_setup(struct tty_struct *tty, struct tty_struct *o_tty); | |
529 | extern void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty); | |
530 | extern void tty_ldisc_init(struct tty_struct *tty); | |
6716671d | 531 | extern void tty_ldisc_deinit(struct tty_struct *tty); |
01e1abb2 AC |
532 | extern void tty_ldisc_begin(void); |
533 | /* This last one is just for the tty layer internals and shouldn't be used elsewhere */ | |
534 | extern void tty_ldisc_enable(struct tty_struct *tty); | |
9c1729db AC |
535 | |
536 | ||
1da177e4 | 537 | /* n_tty.c */ |
a352def2 | 538 | extern struct tty_ldisc_ops tty_ldisc_N_TTY; |
572b9adb | 539 | extern void n_tty_inherit_ops(struct tty_ldisc_ops *ops); |
1da177e4 | 540 | |
522ed776 MT |
541 | /* tty_audit.c */ |
542 | #ifdef CONFIG_AUDIT | |
543 | extern void tty_audit_add_data(struct tty_struct *tty, unsigned char *data, | |
544 | size_t size); | |
545 | extern void tty_audit_exit(void); | |
546 | extern void tty_audit_fork(struct signal_struct *sig); | |
1e641743 | 547 | extern void tty_audit_tiocsti(struct tty_struct *tty, char ch); |
522ed776 | 548 | extern void tty_audit_push(struct tty_struct *tty); |
3c80fe4a TG |
549 | extern int tty_audit_push_task(struct task_struct *tsk, |
550 | uid_t loginuid, u32 sessionid); | |
522ed776 MT |
551 | #else |
552 | static inline void tty_audit_add_data(struct tty_struct *tty, | |
553 | unsigned char *data, size_t size) | |
554 | { | |
555 | } | |
1e641743 AV |
556 | static inline void tty_audit_tiocsti(struct tty_struct *tty, char ch) |
557 | { | |
558 | } | |
522ed776 MT |
559 | static inline void tty_audit_exit(void) |
560 | { | |
561 | } | |
562 | static inline void tty_audit_fork(struct signal_struct *sig) | |
563 | { | |
564 | } | |
565 | static inline void tty_audit_push(struct tty_struct *tty) | |
566 | { | |
567 | } | |
3c80fe4a TG |
568 | static inline int tty_audit_push_task(struct task_struct *tsk, |
569 | uid_t loginuid, u32 sessionid) | |
522ed776 | 570 | { |
3c80fe4a | 571 | return 0; |
522ed776 | 572 | } |
522ed776 MT |
573 | #endif |
574 | ||
31d1d48e DH |
575 | /* tty_io.c */ |
576 | extern int __init tty_init(void); | |
577 | ||
1da177e4 | 578 | /* tty_ioctl.c */ |
47afa7a5 | 579 | extern int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file, |
1da177e4 LT |
580 | unsigned int cmd, unsigned long arg); |
581 | ||
582 | /* serial.c */ | |
583 | ||
584 | extern void serial_console_init(void); | |
7a4d29f4 | 585 | |
1da177e4 LT |
586 | /* pcxx.c */ |
587 | ||
588 | extern int pcxe_open(struct tty_struct *tty, struct file *filp); | |
589 | ||
1da177e4 LT |
590 | /* vt.c */ |
591 | ||
6caa76b7 | 592 | extern int vt_ioctl(struct tty_struct *tty, |
1da177e4 LT |
593 | unsigned int cmd, unsigned long arg); |
594 | ||
94c2273d | 595 | extern long vt_compat_ioctl(struct tty_struct *tty, |
e9216651 AB |
596 | unsigned int cmd, unsigned long arg); |
597 | ||
b07471fa | 598 | /* tty_mutex.c */ |
ec79d605 | 599 | /* functions for preparation of BKL removal */ |
b07471fa AB |
600 | extern void __lockfunc tty_lock(void) __acquires(tty_lock); |
601 | extern void __lockfunc tty_unlock(void) __releases(tty_lock); | |
602 | extern struct task_struct *__big_tty_mutex_owner; | |
603 | #define tty_locked() (current == __big_tty_mutex_owner) | |
ec79d605 | 604 | |
be1bc288 AB |
605 | /* |
606 | * wait_event_interruptible_tty -- wait for a condition with the tty lock held | |
607 | * | |
608 | * The condition we are waiting for might take a long time to | |
609 | * become true, or might depend on another thread taking the | |
610 | * BTM. In either case, we need to drop the BTM to guarantee | |
611 | * forward progress. This is a leftover from the conversion | |
612 | * from the BKL and should eventually get removed as the BTM | |
613 | * falls out of use. | |
614 | * | |
615 | * Do not use in new code. | |
616 | */ | |
617 | #define wait_event_interruptible_tty(wq, condition) \ | |
618 | ({ \ | |
619 | int __ret = 0; \ | |
620 | if (!(condition)) { \ | |
621 | __wait_event_interruptible_tty(wq, condition, __ret); \ | |
622 | } \ | |
623 | __ret; \ | |
624 | }) | |
625 | ||
626 | #define __wait_event_interruptible_tty(wq, condition, ret) \ | |
627 | do { \ | |
628 | DEFINE_WAIT(__wait); \ | |
629 | \ | |
630 | for (;;) { \ | |
631 | prepare_to_wait(&wq, &__wait, TASK_INTERRUPTIBLE); \ | |
632 | if (condition) \ | |
633 | break; \ | |
634 | if (!signal_pending(current)) { \ | |
635 | tty_unlock(); \ | |
636 | schedule(); \ | |
637 | tty_lock(); \ | |
638 | continue; \ | |
639 | } \ | |
640 | ret = -ERESTARTSYS; \ | |
641 | break; \ | |
642 | } \ | |
643 | finish_wait(&wq, &__wait); \ | |
644 | } while (0) | |
645 | ||
646 | ||
1da177e4 LT |
647 | #endif /* __KERNEL__ */ |
648 | #endif |