Lines Matching refs:ldata
131 static inline size_t read_cnt(struct n_tty_data *ldata) in read_cnt() argument
133 return ldata->read_head - ldata->read_tail; in read_cnt()
136 static inline unsigned char read_buf(struct n_tty_data *ldata, size_t i) in read_buf() argument
138 return ldata->read_buf[i & (N_TTY_BUF_SIZE - 1)]; in read_buf()
141 static inline unsigned char *read_buf_addr(struct n_tty_data *ldata, size_t i) in read_buf_addr() argument
143 return &ldata->read_buf[i & (N_TTY_BUF_SIZE - 1)]; in read_buf_addr()
146 static inline unsigned char echo_buf(struct n_tty_data *ldata, size_t i) in echo_buf() argument
148 return ldata->echo_buf[i & (N_TTY_BUF_SIZE - 1)]; in echo_buf()
151 static inline unsigned char *echo_buf_addr(struct n_tty_data *ldata, size_t i) in echo_buf_addr() argument
153 return &ldata->echo_buf[i & (N_TTY_BUF_SIZE - 1)]; in echo_buf_addr()
159 struct n_tty_data *ldata = tty->disc_data; in tty_put_user() local
161 tty_audit_add_data(tty, &x, 1, ldata->icanon); in tty_put_user()
170 struct n_tty_data *ldata = tty->disc_data; in tty_copy_to_user() local
172 tty_audit_add_data(tty, from, n, ldata->icanon); in tty_copy_to_user()
190 struct n_tty_data *ldata = tty->disc_data; in n_tty_kick_worker() local
193 if (unlikely(ldata->no_room)) { in n_tty_kick_worker()
194 ldata->no_room = 0; in n_tty_kick_worker()
210 struct n_tty_data *ldata = tty->disc_data; in chars_in_buffer() local
213 if (!ldata->icanon) in chars_in_buffer()
214 n = ldata->commit_head - ldata->read_tail; in chars_in_buffer()
216 n = ldata->canon_head - ldata->read_tail; in chars_in_buffer()
237 struct n_tty_data *ldata = tty->disc_data; in n_tty_check_throttle() local
244 if (ldata->icanon && ldata->canon_head == ldata->read_tail) in n_tty_check_throttle()
250 if (N_TTY_BUF_SIZE - read_cnt(ldata) >= TTY_THRESHOLD_THROTTLE) in n_tty_check_throttle()
305 static inline void put_tty_queue(unsigned char c, struct n_tty_data *ldata) in put_tty_queue() argument
307 *read_buf_addr(ldata, ldata->read_head) = c; in put_tty_queue()
308 ldata->read_head++; in put_tty_queue()
322 static void reset_buffer_flags(struct n_tty_data *ldata) in reset_buffer_flags() argument
324 ldata->read_head = ldata->canon_head = ldata->read_tail = 0; in reset_buffer_flags()
325 ldata->echo_head = ldata->echo_tail = ldata->echo_commit = 0; in reset_buffer_flags()
326 ldata->commit_head = 0; in reset_buffer_flags()
327 ldata->echo_mark = 0; in reset_buffer_flags()
328 ldata->line_start = 0; in reset_buffer_flags()
330 ldata->erasing = 0; in reset_buffer_flags()
331 bitmap_zero(ldata->read_flags, N_TTY_BUF_SIZE); in reset_buffer_flags()
332 ldata->push = 0; in reset_buffer_flags()
445 struct n_tty_data *ldata = tty->disc_data; in do_output_char() local
454 ldata->column = 0; in do_output_char()
458 ldata->canon_column = ldata->column = 0; in do_output_char()
462 ldata->canon_column = ldata->column; in do_output_char()
465 if (O_ONOCR(tty) && ldata->column == 0) in do_output_char()
470 ldata->canon_column = ldata->column = 0; in do_output_char()
473 ldata->canon_column = ldata->column = 0; in do_output_char()
476 spaces = 8 - (ldata->column & 7); in do_output_char()
480 ldata->column += spaces; in do_output_char()
484 ldata->column += spaces; in do_output_char()
487 if (ldata->column > 0) in do_output_char()
488 ldata->column--; in do_output_char()
495 ldata->column++; in do_output_char()
520 struct n_tty_data *ldata = tty->disc_data; in process_output() local
523 mutex_lock(&ldata->output_lock); in process_output()
528 mutex_unlock(&ldata->output_lock); in process_output()
557 struct n_tty_data *ldata = tty->disc_data; in process_output_block() local
562 mutex_lock(&ldata->output_lock); in process_output_block()
566 mutex_unlock(&ldata->output_lock); in process_output_block()
578 ldata->column = 0; in process_output_block()
581 ldata->canon_column = ldata->column; in process_output_block()
584 if (O_ONOCR(tty) && ldata->column == 0) in process_output_block()
588 ldata->canon_column = ldata->column = 0; in process_output_block()
593 if (ldata->column > 0) in process_output_block()
594 ldata->column--; in process_output_block()
601 ldata->column++; in process_output_block()
609 mutex_unlock(&ldata->output_lock); in process_output_block()
640 struct n_tty_data *ldata = tty->disc_data; in __process_echoes() local
647 tail = ldata->echo_tail; in __process_echoes()
648 while (ldata->echo_commit != tail) { in __process_echoes()
649 c = echo_buf(ldata, tail); in __process_echoes()
659 op = echo_buf(ldata, tail + 1); in __process_echoes()
665 num_chars = echo_buf(ldata, tail + 2); in __process_echoes()
678 num_chars += ldata->canon_column; in __process_echoes()
688 if (ldata->column > 0) in __process_echoes()
689 ldata->column--; in __process_echoes()
695 ldata->canon_column = ldata->column; in __process_echoes()
700 if (ldata->column > 0) in __process_echoes()
701 ldata->column--; in __process_echoes()
712 ldata->column++; in __process_echoes()
733 ldata->column += 2; in __process_echoes()
759 while (ldata->echo_commit - tail >= ECHO_DISCARD_WATERMARK) { in __process_echoes()
760 if (echo_buf(ldata, tail) == ECHO_OP_START) { in __process_echoes()
761 if (echo_buf(ldata, tail + 1) == ECHO_OP_ERASE_TAB) in __process_echoes()
769 ldata->echo_tail = tail; in __process_echoes()
775 struct n_tty_data *ldata = tty->disc_data; in commit_echoes() local
779 head = ldata->echo_head; in commit_echoes()
780 ldata->echo_mark = head; in commit_echoes()
781 old = ldata->echo_commit - ldata->echo_tail; in commit_echoes()
786 nr = head - ldata->echo_tail; in commit_echoes()
790 mutex_lock(&ldata->output_lock); in commit_echoes()
791 ldata->echo_commit = head; in commit_echoes()
793 mutex_unlock(&ldata->output_lock); in commit_echoes()
801 struct n_tty_data *ldata = tty->disc_data; in process_echoes() local
804 if (ldata->echo_mark == ldata->echo_tail) in process_echoes()
807 mutex_lock(&ldata->output_lock); in process_echoes()
808 ldata->echo_commit = ldata->echo_mark; in process_echoes()
810 mutex_unlock(&ldata->output_lock); in process_echoes()
819 struct n_tty_data *ldata = tty->disc_data; in flush_echoes() local
822 ldata->echo_commit == ldata->echo_head) in flush_echoes()
825 mutex_lock(&ldata->output_lock); in flush_echoes()
826 ldata->echo_commit = ldata->echo_head; in flush_echoes()
828 mutex_unlock(&ldata->output_lock); in flush_echoes()
839 static inline void add_echo_byte(unsigned char c, struct n_tty_data *ldata) in add_echo_byte() argument
841 *echo_buf_addr(ldata, ldata->echo_head++) = c; in add_echo_byte()
851 static void echo_move_back_col(struct n_tty_data *ldata) in echo_move_back_col() argument
853 add_echo_byte(ECHO_OP_START, ldata); in echo_move_back_col()
854 add_echo_byte(ECHO_OP_MOVE_BACK_COL, ldata); in echo_move_back_col()
865 static void echo_set_canon_col(struct n_tty_data *ldata) in echo_set_canon_col() argument
867 add_echo_byte(ECHO_OP_START, ldata); in echo_set_canon_col()
868 add_echo_byte(ECHO_OP_SET_CANON_COL, ldata); in echo_set_canon_col()
887 struct n_tty_data *ldata) in echo_erase_tab() argument
889 add_echo_byte(ECHO_OP_START, ldata); in echo_erase_tab()
890 add_echo_byte(ECHO_OP_ERASE_TAB, ldata); in echo_erase_tab()
899 add_echo_byte(num_chars, ldata); in echo_erase_tab()
913 static void echo_char_raw(unsigned char c, struct n_tty_data *ldata) in echo_char_raw() argument
916 add_echo_byte(ECHO_OP_START, ldata); in echo_char_raw()
917 add_echo_byte(ECHO_OP_START, ldata); in echo_char_raw()
919 add_echo_byte(c, ldata); in echo_char_raw()
937 struct n_tty_data *ldata = tty->disc_data; in echo_char() local
940 add_echo_byte(ECHO_OP_START, ldata); in echo_char()
941 add_echo_byte(ECHO_OP_START, ldata); in echo_char()
944 add_echo_byte(ECHO_OP_START, ldata); in echo_char()
945 add_echo_byte(c, ldata); in echo_char()
954 static inline void finish_erasing(struct n_tty_data *ldata) in finish_erasing() argument
956 if (ldata->erasing) { in finish_erasing()
957 echo_char_raw('/', ldata); in finish_erasing()
958 ldata->erasing = 0; in finish_erasing()
977 struct n_tty_data *ldata = tty->disc_data; in eraser() local
983 if (ldata->read_head == ldata->canon_head) { in eraser()
993 ldata->read_head = ldata->canon_head; in eraser()
997 ldata->read_head = ldata->canon_head; in eraser()
998 finish_erasing(ldata); in eraser()
1002 echo_char_raw('\n', ldata); in eraser()
1009 while (ldata->read_head != ldata->canon_head) { in eraser()
1010 head = ldata->read_head; in eraser()
1015 c = read_buf(ldata, head); in eraser()
1016 } while (is_continuation(c, tty) && head != ldata->canon_head); in eraser()
1029 cnt = ldata->read_head - head; in eraser()
1030 ldata->read_head = head; in eraser()
1033 if (!ldata->erasing) { in eraser()
1034 echo_char_raw('\\', ldata); in eraser()
1035 ldata->erasing = 1; in eraser()
1041 echo_char_raw(read_buf(ldata, head), ldata); in eraser()
1042 echo_move_back_col(ldata); in eraser()
1049 size_t tail = ldata->read_head; in eraser()
1058 while (tail != ldata->canon_head) { in eraser()
1060 c = read_buf(ldata, tail); in eraser()
1071 echo_erase_tab(num_chars, after_tab, ldata); in eraser()
1074 echo_char_raw('\b', ldata); in eraser()
1075 echo_char_raw(' ', ldata); in eraser()
1076 echo_char_raw('\b', ldata); in eraser()
1079 echo_char_raw('\b', ldata); in eraser()
1080 echo_char_raw(' ', ldata); in eraser()
1081 echo_char_raw('\b', ldata); in eraser()
1088 if (ldata->read_head == ldata->canon_head && L_ECHO(tty)) in eraser()
1089 finish_erasing(ldata); in eraser()
1118 struct n_tty_data *ldata = tty->disc_data; in isig() local
1131 mutex_lock(&ldata->output_lock); in isig()
1132 ldata->echo_head = ldata->echo_tail = 0; in isig()
1133 ldata->echo_mark = ldata->echo_commit = 0; in isig()
1134 mutex_unlock(&ldata->output_lock); in isig()
1166 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_break() local
1175 put_tty_queue('\377', ldata); in n_tty_receive_break()
1176 put_tty_queue('\0', ldata); in n_tty_receive_break()
1178 put_tty_queue('\0', ldata); in n_tty_receive_break()
1196 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_overrun() local
1198 ldata->num_overrun++; in n_tty_receive_overrun()
1199 if (time_after(jiffies, ldata->overrun_time + HZ) || in n_tty_receive_overrun()
1200 time_after(ldata->overrun_time, jiffies)) { in n_tty_receive_overrun()
1203 ldata->num_overrun); in n_tty_receive_overrun()
1204 ldata->overrun_time = jiffies; in n_tty_receive_overrun()
1205 ldata->num_overrun = 0; in n_tty_receive_overrun()
1222 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_parity_error() local
1228 put_tty_queue('\377', ldata); in n_tty_receive_parity_error()
1229 put_tty_queue('\0', ldata); in n_tty_receive_parity_error()
1230 put_tty_queue(c, ldata); in n_tty_receive_parity_error()
1232 put_tty_queue('\0', ldata); in n_tty_receive_parity_error()
1234 put_tty_queue(c, ldata); in n_tty_receive_parity_error()
1270 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_char_special() local
1310 if (ldata->icanon) { in n_tty_receive_char_special()
1318 ldata->lnext = 1; in n_tty_receive_char_special()
1320 finish_erasing(ldata); in n_tty_receive_char_special()
1322 echo_char_raw('^', ldata); in n_tty_receive_char_special()
1323 echo_char_raw('\b', ldata); in n_tty_receive_char_special()
1330 size_t tail = ldata->canon_head; in n_tty_receive_char_special()
1332 finish_erasing(ldata); in n_tty_receive_char_special()
1334 echo_char_raw('\n', ldata); in n_tty_receive_char_special()
1335 while (tail != ldata->read_head) { in n_tty_receive_char_special()
1336 echo_char(read_buf(ldata, tail), tty); in n_tty_receive_char_special()
1344 echo_char_raw('\n', ldata); in n_tty_receive_char_special()
1360 if (ldata->canon_head == ldata->read_head) in n_tty_receive_char_special()
1361 echo_set_canon_col(ldata); in n_tty_receive_char_special()
1370 put_tty_queue(c, ldata); in n_tty_receive_char_special()
1373 set_bit(ldata->read_head & (N_TTY_BUF_SIZE - 1), ldata->read_flags); in n_tty_receive_char_special()
1374 put_tty_queue(c, ldata); in n_tty_receive_char_special()
1375 smp_store_release(&ldata->canon_head, ldata->read_head); in n_tty_receive_char_special()
1383 finish_erasing(ldata); in n_tty_receive_char_special()
1385 echo_char_raw('\n', ldata); in n_tty_receive_char_special()
1388 if (ldata->canon_head == ldata->read_head) in n_tty_receive_char_special()
1389 echo_set_canon_col(ldata); in n_tty_receive_char_special()
1397 put_tty_queue(c, ldata); in n_tty_receive_char_special()
1399 put_tty_queue(c, ldata); in n_tty_receive_char_special()
1406 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_char_inline() local
1413 finish_erasing(ldata); in n_tty_receive_char_inline()
1415 if (ldata->canon_head == ldata->read_head) in n_tty_receive_char_inline()
1416 echo_set_canon_col(ldata); in n_tty_receive_char_inline()
1422 put_tty_queue(c, ldata); in n_tty_receive_char_inline()
1423 put_tty_queue(c, ldata); in n_tty_receive_char_inline()
1434 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_char_fast() local
1441 finish_erasing(ldata); in n_tty_receive_char_fast()
1443 if (ldata->canon_head == ldata->read_head) in n_tty_receive_char_fast()
1444 echo_set_canon_col(ldata); in n_tty_receive_char_fast()
1448 put_tty_queue(c, ldata); in n_tty_receive_char_fast()
1495 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_char_lnext() local
1497 ldata->lnext = 0; in n_tty_receive_char_lnext()
1512 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_buf_real_raw() local
1515 head = ldata->read_head & (N_TTY_BUF_SIZE - 1); in n_tty_receive_buf_real_raw()
1517 memcpy(read_buf_addr(ldata, head), cp, n); in n_tty_receive_buf_real_raw()
1518 ldata->read_head += n; in n_tty_receive_buf_real_raw()
1522 head = ldata->read_head & (N_TTY_BUF_SIZE - 1); in n_tty_receive_buf_real_raw()
1524 memcpy(read_buf_addr(ldata, head), cp, n); in n_tty_receive_buf_real_raw()
1525 ldata->read_head += n; in n_tty_receive_buf_real_raw()
1532 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_buf_raw() local
1539 put_tty_queue(*cp++, ldata); in n_tty_receive_buf_raw()
1565 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_buf_standard() local
1579 put_tty_queue(c, ldata); in n_tty_receive_buf_standard()
1582 if (!test_bit(c, ldata->char_map)) in n_tty_receive_buf_standard()
1599 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_buf_fast() local
1608 if (!test_bit(c, ldata->char_map)) in n_tty_receive_buf_fast()
1624 struct n_tty_data *ldata = tty->disc_data; in __receive_buf() local
1627 if (ldata->real_raw) in __receive_buf()
1629 else if (ldata->raw || (L_EXTPROC(tty) && !preops)) in __receive_buf()
1634 if (ldata->lnext) { in __receive_buf()
1653 if (ldata->icanon && !L_EXTPROC(tty)) in __receive_buf()
1657 smp_store_release(&ldata->commit_head, ldata->read_head); in __receive_buf()
1659 if ((read_cnt(ldata) >= ldata->minimum_to_wake) || L_EXTPROC(tty)) { in __receive_buf()
1702 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_buf_common() local
1721 size_t tail = smp_load_acquire(&ldata->read_tail); in n_tty_receive_buf_common()
1723 room = N_TTY_BUF_SIZE - (ldata->read_head - tail); in n_tty_receive_buf_common()
1728 overflow = ldata->icanon && ldata->canon_head == tail; in n_tty_receive_buf_common()
1730 ldata->read_head--; in n_tty_receive_buf_common()
1732 ldata->no_room = flow && !room; in n_tty_receive_buf_common()
1802 struct n_tty_data *ldata = tty->disc_data; in n_tty_set_termios() local
1805 bitmap_zero(ldata->read_flags, N_TTY_BUF_SIZE); in n_tty_set_termios()
1806 ldata->line_start = ldata->read_tail; in n_tty_set_termios()
1807 if (!L_ICANON(tty) || !read_cnt(ldata)) { in n_tty_set_termios()
1808 ldata->canon_head = ldata->read_tail; in n_tty_set_termios()
1809 ldata->push = 0; in n_tty_set_termios()
1811 set_bit((ldata->read_head - 1) & (N_TTY_BUF_SIZE - 1), in n_tty_set_termios()
1812 ldata->read_flags); in n_tty_set_termios()
1813 ldata->canon_head = ldata->read_head; in n_tty_set_termios()
1814 ldata->push = 1; in n_tty_set_termios()
1816 ldata->commit_head = ldata->read_head; in n_tty_set_termios()
1817 ldata->erasing = 0; in n_tty_set_termios()
1818 ldata->lnext = 0; in n_tty_set_termios()
1821 ldata->icanon = (L_ICANON(tty) != 0); in n_tty_set_termios()
1827 bitmap_zero(ldata->char_map, 256); in n_tty_set_termios()
1830 set_bit('\r', ldata->char_map); in n_tty_set_termios()
1832 set_bit('\n', ldata->char_map); in n_tty_set_termios()
1835 set_bit(ERASE_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1836 set_bit(KILL_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1837 set_bit(EOF_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1838 set_bit('\n', ldata->char_map); in n_tty_set_termios()
1839 set_bit(EOL_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1841 set_bit(WERASE_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1842 set_bit(LNEXT_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1843 set_bit(EOL2_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1846 ldata->char_map); in n_tty_set_termios()
1850 set_bit(START_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1851 set_bit(STOP_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1854 set_bit(INTR_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1855 set_bit(QUIT_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1856 set_bit(SUSP_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1858 clear_bit(__DISABLED_CHAR, ldata->char_map); in n_tty_set_termios()
1859 ldata->raw = 0; in n_tty_set_termios()
1860 ldata->real_raw = 0; in n_tty_set_termios()
1862 ldata->raw = 1; in n_tty_set_termios()
1866 ldata->real_raw = 1; in n_tty_set_termios()
1868 ldata->real_raw = 0; in n_tty_set_termios()
1896 struct n_tty_data *ldata = tty->disc_data; in n_tty_close() local
1901 vfree(ldata); in n_tty_close()
1917 struct n_tty_data *ldata; in n_tty_open() local
1920 ldata = vmalloc(sizeof(*ldata)); in n_tty_open()
1921 if (!ldata) in n_tty_open()
1924 ldata->overrun_time = jiffies; in n_tty_open()
1925 mutex_init(&ldata->atomic_read_lock); in n_tty_open()
1926 mutex_init(&ldata->output_lock); in n_tty_open()
1928 tty->disc_data = ldata; in n_tty_open()
1930 ldata->column = 0; in n_tty_open()
1931 ldata->canon_column = 0; in n_tty_open()
1932 ldata->minimum_to_wake = 1; in n_tty_open()
1933 ldata->num_overrun = 0; in n_tty_open()
1934 ldata->no_room = 0; in n_tty_open()
1935 ldata->lnext = 0; in n_tty_open()
1949 struct n_tty_data *ldata = tty->disc_data; in input_available_p() local
1952 if (ldata->icanon && !L_EXTPROC(tty)) in input_available_p()
1953 return ldata->canon_head != ldata->read_tail; in input_available_p()
1955 return ldata->commit_head - ldata->read_tail >= amt; in input_available_p()
1983 struct n_tty_data *ldata = tty->disc_data; in copy_from_read_buf() local
1987 size_t head = smp_load_acquire(&ldata->commit_head); in copy_from_read_buf()
1988 size_t tail = ldata->read_tail & (N_TTY_BUF_SIZE - 1); in copy_from_read_buf()
1991 n = min(head - ldata->read_tail, N_TTY_BUF_SIZE - tail); in copy_from_read_buf()
1994 retval = copy_to_user(*b, read_buf_addr(ldata, tail), n); in copy_from_read_buf()
1996 is_eof = n == 1 && read_buf(ldata, tail) == EOF_CHAR(tty); in copy_from_read_buf()
1997 tty_audit_add_data(tty, read_buf_addr(ldata, tail), n, in copy_from_read_buf()
1998 ldata->icanon); in copy_from_read_buf()
1999 smp_store_release(&ldata->read_tail, ldata->read_tail + n); in copy_from_read_buf()
2001 if (L_EXTPROC(tty) && ldata->icanon && is_eof && in copy_from_read_buf()
2002 (head == ldata->read_tail)) in copy_from_read_buf()
2037 struct n_tty_data *ldata = tty->disc_data; in canon_copy_from_read_buf() local
2047 n = min(*nr + 1, smp_load_acquire(&ldata->canon_head) - ldata->read_tail); in canon_copy_from_read_buf()
2049 tail = ldata->read_tail & (N_TTY_BUF_SIZE - 1); in canon_copy_from_read_buf()
2055 eol = find_next_bit(ldata->read_flags, size, tail); in canon_copy_from_read_buf()
2059 eol = find_next_bit(ldata->read_flags, more, 0); in canon_copy_from_read_buf()
2071 if (!found || read_buf(ldata, eol) != __DISABLED_CHAR) { in canon_copy_from_read_buf()
2080 ret = tty_copy_to_user(tty, *b, read_buf_addr(ldata, tail), size); in canon_copy_from_read_buf()
2083 ret = tty_copy_to_user(tty, *b + size, ldata->read_buf, n - size); in canon_copy_from_read_buf()
2085 ret = tty_copy_to_user(tty, *b, read_buf_addr(ldata, tail), n); in canon_copy_from_read_buf()
2093 clear_bit(eol, ldata->read_flags); in canon_copy_from_read_buf()
2094 smp_store_release(&ldata->read_tail, ldata->read_tail + c); in canon_copy_from_read_buf()
2097 if (!ldata->push) in canon_copy_from_read_buf()
2098 ldata->line_start = ldata->read_tail; in canon_copy_from_read_buf()
2100 ldata->push = 0; in canon_copy_from_read_buf()
2159 struct n_tty_data *ldata = tty->disc_data; in n_tty_read() local
2177 if (!mutex_trylock(&ldata->atomic_read_lock)) in n_tty_read()
2180 if (mutex_lock_interruptible(&ldata->atomic_read_lock)) in n_tty_read()
2188 if (!ldata->icanon) { in n_tty_read()
2193 ldata->minimum_to_wake = 1; in n_tty_read()
2195 (ldata->minimum_to_wake > minimum)) in n_tty_read()
2196 ldata->minimum_to_wake = minimum; in n_tty_read()
2199 ldata->minimum_to_wake = minimum = 1; in n_tty_read()
2204 tail = ldata->read_tail; in n_tty_read()
2226 if (((minimum - (b - buf)) < ldata->minimum_to_wake) && in n_tty_read()
2228 ldata->minimum_to_wake = (minimum - (b - buf)); in n_tty_read()
2261 if (ldata->icanon && !L_EXTPROC(tty)) { in n_tty_read()
2293 if (tail != ldata->read_tail) in n_tty_read()
2299 ldata->minimum_to_wake = minimum; in n_tty_read()
2301 mutex_unlock(&ldata->atomic_read_lock); in n_tty_read()
2382 struct n_tty_data *ldata = tty->disc_data; in n_tty_write() local
2385 mutex_lock(&ldata->output_lock); in n_tty_write()
2387 mutex_unlock(&ldata->output_lock); in n_tty_write()
2435 struct n_tty_data *ldata = tty->disc_data; in n_tty_poll() local
2455 ldata->minimum_to_wake = MIN_CHAR(tty); in n_tty_poll()
2457 ldata->minimum_to_wake = 1; in n_tty_poll()
2466 static unsigned long inq_canon(struct n_tty_data *ldata) in inq_canon() argument
2470 if (ldata->canon_head == ldata->read_tail) in inq_canon()
2472 head = ldata->canon_head; in inq_canon()
2473 tail = ldata->read_tail; in inq_canon()
2477 if (test_bit(tail & (N_TTY_BUF_SIZE - 1), ldata->read_flags) && in inq_canon()
2478 read_buf(ldata, tail) == __DISABLED_CHAR) in inq_canon()
2488 struct n_tty_data *ldata = tty->disc_data; in n_tty_ioctl() local
2497 retval = inq_canon(ldata); in n_tty_ioctl()
2499 retval = read_cnt(ldata); in n_tty_ioctl()
2509 struct n_tty_data *ldata = tty->disc_data; in n_tty_fasync() local
2513 ldata->minimum_to_wake = 1; in n_tty_fasync()
2515 ldata->minimum_to_wake = N_TTY_BUF_SIZE; in n_tty_fasync()