Lines Matching refs:ldata
134 static inline size_t read_cnt(struct n_tty_data *ldata) in read_cnt() argument
136 return ldata->read_head - ldata->read_tail; in read_cnt()
139 static inline u8 read_buf(struct n_tty_data *ldata, size_t i) in read_buf() argument
141 return ldata->read_buf[MASK(i)]; in read_buf()
144 static inline u8 *read_buf_addr(struct n_tty_data *ldata, size_t i) in read_buf_addr() argument
146 return &ldata->read_buf[MASK(i)]; in read_buf_addr()
149 static inline u8 echo_buf(struct n_tty_data *ldata, size_t i) in echo_buf() argument
152 return ldata->echo_buf[MASK(i)]; in echo_buf()
155 static inline u8 *echo_buf_addr(struct n_tty_data *ldata, size_t i) in echo_buf_addr() argument
157 return &ldata->echo_buf[MASK(i)]; in echo_buf_addr()
170 struct n_tty_data *ldata = tty->disc_data; in tty_copy() local
172 void *from = read_buf_addr(ldata, tail); in tty_copy()
180 from = ldata->read_buf; in tty_copy()
201 struct n_tty_data *ldata = tty->disc_data; in n_tty_kick_worker() local
204 if (unlikely(READ_ONCE(ldata->no_room))) { in n_tty_kick_worker()
205 WRITE_ONCE(ldata->no_room, 0); in n_tty_kick_worker()
221 const struct n_tty_data *ldata = tty->disc_data; in chars_in_buffer() local
222 size_t head = ldata->icanon ? ldata->canon_head : ldata->commit_head; in chars_in_buffer()
224 return head - ldata->read_tail; in chars_in_buffer()
242 struct n_tty_data *ldata = tty->disc_data; in n_tty_check_throttle() local
249 if (ldata->icanon && ldata->canon_head == ldata->read_tail) in n_tty_check_throttle()
255 if (N_TTY_BUF_SIZE - read_cnt(ldata) >= TTY_THRESHOLD_THROTTLE) in n_tty_check_throttle()
306 static inline void put_tty_queue(u8 c, struct n_tty_data *ldata) in put_tty_queue() argument
308 *read_buf_addr(ldata, ldata->read_head) = c; in put_tty_queue()
309 ldata->read_head++; in put_tty_queue()
323 static void reset_buffer_flags(struct n_tty_data *ldata) in reset_buffer_flags() argument
325 ldata->read_head = ldata->canon_head = ldata->read_tail = 0; in reset_buffer_flags()
326 ldata->commit_head = 0; in reset_buffer_flags()
327 ldata->line_start = 0; in reset_buffer_flags()
329 ldata->erasing = 0; in reset_buffer_flags()
330 bitmap_zero(ldata->read_flags, N_TTY_BUF_SIZE); in reset_buffer_flags()
331 ldata->push = 0; in reset_buffer_flags()
333 ldata->lookahead_count = 0; in reset_buffer_flags()
419 struct n_tty_data *ldata = tty->disc_data; in do_output_char() local
428 ldata->column = 0; in do_output_char()
432 ldata->canon_column = ldata->column = 0; in do_output_char()
436 ldata->canon_column = ldata->column; in do_output_char()
439 if (O_ONOCR(tty) && ldata->column == 0) in do_output_char()
444 ldata->canon_column = ldata->column = 0; in do_output_char()
447 ldata->canon_column = ldata->column = 0; in do_output_char()
450 spaces = 8 - (ldata->column & 7); in do_output_char()
454 ldata->column += spaces; in do_output_char()
458 ldata->column += spaces; in do_output_char()
461 if (ldata->column > 0) in do_output_char()
462 ldata->column--; in do_output_char()
469 ldata->column++; in do_output_char()
493 struct n_tty_data *ldata = tty->disc_data; in process_output() local
496 mutex_lock(&ldata->output_lock); in process_output()
501 mutex_unlock(&ldata->output_lock); in process_output()
529 struct n_tty_data *ldata = tty->disc_data; in process_output_block() local
534 mutex_lock(&ldata->output_lock); in process_output_block()
538 mutex_unlock(&ldata->output_lock); in process_output_block()
550 ldata->column = 0; in process_output_block()
553 ldata->canon_column = ldata->column; in process_output_block()
556 if (O_ONOCR(tty) && ldata->column == 0) in process_output_block()
560 ldata->canon_column = ldata->column = 0; in process_output_block()
565 if (ldata->column > 0) in process_output_block()
566 ldata->column--; in process_output_block()
573 ldata->column++; in process_output_block()
581 mutex_unlock(&ldata->output_lock); in process_output_block()
588 struct n_tty_data *ldata = tty->disc_data; in n_tty_process_echo_ops() local
595 if (MASK(ldata->echo_commit) == MASK(*tail + 1)) in n_tty_process_echo_ops()
602 op = echo_buf(ldata, *tail + 1); in n_tty_process_echo_ops()
608 if (MASK(ldata->echo_commit) == MASK(*tail + 2)) in n_tty_process_echo_ops()
611 num_chars = echo_buf(ldata, *tail + 2); in n_tty_process_echo_ops()
621 num_chars += ldata->canon_column; in n_tty_process_echo_ops()
630 if (ldata->column > 0) in n_tty_process_echo_ops()
631 ldata->column--; in n_tty_process_echo_ops()
637 ldata->canon_column = ldata->column; in n_tty_process_echo_ops()
642 if (ldata->column > 0) in n_tty_process_echo_ops()
643 ldata->column--; in n_tty_process_echo_ops()
653 ldata->column++; in n_tty_process_echo_ops()
670 ldata->column += 2; in n_tty_process_echo_ops()
703 struct n_tty_data *ldata = tty->disc_data; in __process_echoes() local
710 tail = ldata->echo_tail; in __process_echoes()
711 while (MASK(ldata->echo_commit) != MASK(tail)) { in __process_echoes()
712 c = echo_buf(ldata, tail); in __process_echoes()
739 while (ldata->echo_commit > tail && in __process_echoes()
740 ldata->echo_commit - tail >= ECHO_DISCARD_WATERMARK) { in __process_echoes()
741 if (echo_buf(ldata, tail) == ECHO_OP_START) { in __process_echoes()
742 if (echo_buf(ldata, tail + 1) == ECHO_OP_ERASE_TAB) in __process_echoes()
751 ldata->echo_tail = tail; in __process_echoes()
757 struct n_tty_data *ldata = tty->disc_data; in commit_echoes() local
761 mutex_lock(&ldata->output_lock); in commit_echoes()
762 head = ldata->echo_head; in commit_echoes()
763 ldata->echo_mark = head; in commit_echoes()
764 old = ldata->echo_commit - ldata->echo_tail; in commit_echoes()
769 nr = head - ldata->echo_tail; in commit_echoes()
772 mutex_unlock(&ldata->output_lock); in commit_echoes()
776 ldata->echo_commit = head; in commit_echoes()
778 mutex_unlock(&ldata->output_lock); in commit_echoes()
786 struct n_tty_data *ldata = tty->disc_data; in process_echoes() local
789 if (ldata->echo_mark == ldata->echo_tail) in process_echoes()
792 mutex_lock(&ldata->output_lock); in process_echoes()
793 ldata->echo_commit = ldata->echo_mark; in process_echoes()
795 mutex_unlock(&ldata->output_lock); in process_echoes()
804 struct n_tty_data *ldata = tty->disc_data; in flush_echoes() local
807 ldata->echo_commit == ldata->echo_head) in flush_echoes()
810 mutex_lock(&ldata->output_lock); in flush_echoes()
811 ldata->echo_commit = ldata->echo_head; in flush_echoes()
813 mutex_unlock(&ldata->output_lock); in flush_echoes()
823 static inline void add_echo_byte(u8 c, struct n_tty_data *ldata) in add_echo_byte() argument
825 *echo_buf_addr(ldata, ldata->echo_head) = c; in add_echo_byte()
827 ldata->echo_head++; in add_echo_byte()
836 static void echo_move_back_col(struct n_tty_data *ldata) in echo_move_back_col() argument
838 add_echo_byte(ECHO_OP_START, ldata); in echo_move_back_col()
839 add_echo_byte(ECHO_OP_MOVE_BACK_COL, ldata); in echo_move_back_col()
849 static void echo_set_canon_col(struct n_tty_data *ldata) in echo_set_canon_col() argument
851 add_echo_byte(ECHO_OP_START, ldata); in echo_set_canon_col()
852 add_echo_byte(ECHO_OP_SET_CANON_COL, ldata); in echo_set_canon_col()
869 struct n_tty_data *ldata) in echo_erase_tab() argument
871 add_echo_byte(ECHO_OP_START, ldata); in echo_erase_tab()
872 add_echo_byte(ECHO_OP_ERASE_TAB, ldata); in echo_erase_tab()
881 add_echo_byte(num_chars, ldata); in echo_erase_tab()
894 static void echo_char_raw(u8 c, struct n_tty_data *ldata) in echo_char_raw() argument
897 add_echo_byte(ECHO_OP_START, ldata); in echo_char_raw()
898 add_echo_byte(ECHO_OP_START, ldata); in echo_char_raw()
900 add_echo_byte(c, ldata); in echo_char_raw()
917 struct n_tty_data *ldata = tty->disc_data; in echo_char() local
920 add_echo_byte(ECHO_OP_START, ldata); in echo_char()
921 add_echo_byte(ECHO_OP_START, ldata); in echo_char()
924 add_echo_byte(ECHO_OP_START, ldata); in echo_char()
925 add_echo_byte(c, ldata); in echo_char()
933 static inline void finish_erasing(struct n_tty_data *ldata) in finish_erasing() argument
935 if (ldata->erasing) { in finish_erasing()
936 echo_char_raw('/', ldata); in finish_erasing()
937 ldata->erasing = 0; in finish_erasing()
955 struct n_tty_data *ldata = tty->disc_data; in eraser() local
961 if (ldata->read_head == ldata->canon_head) { in eraser()
971 ldata->read_head = ldata->canon_head; in eraser()
975 ldata->read_head = ldata->canon_head; in eraser()
976 finish_erasing(ldata); in eraser()
980 echo_char_raw('\n', ldata); in eraser()
987 while (MASK(ldata->read_head) != MASK(ldata->canon_head)) { in eraser()
988 head = ldata->read_head; in eraser()
993 c = read_buf(ldata, head); in eraser()
995 MASK(head) != MASK(ldata->canon_head)); in eraser()
1008 cnt = ldata->read_head - head; in eraser()
1009 ldata->read_head = head; in eraser()
1012 if (!ldata->erasing) { in eraser()
1013 echo_char_raw('\\', ldata); in eraser()
1014 ldata->erasing = 1; in eraser()
1020 echo_char_raw(read_buf(ldata, head), ldata); in eraser()
1021 echo_move_back_col(ldata); in eraser()
1028 size_t tail = ldata->read_head; in eraser()
1037 while (MASK(tail) != MASK(ldata->canon_head)) { in eraser()
1039 c = read_buf(ldata, tail); in eraser()
1050 echo_erase_tab(num_chars, after_tab, ldata); in eraser()
1053 echo_char_raw('\b', ldata); in eraser()
1054 echo_char_raw(' ', ldata); in eraser()
1055 echo_char_raw('\b', ldata); in eraser()
1058 echo_char_raw('\b', ldata); in eraser()
1059 echo_char_raw(' ', ldata); in eraser()
1060 echo_char_raw('\b', ldata); in eraser()
1067 if (ldata->read_head == ldata->canon_head && L_ECHO(tty)) in eraser()
1068 finish_erasing(ldata); in eraser()
1097 struct n_tty_data *ldata = tty->disc_data; in isig() local
1110 mutex_lock(&ldata->output_lock); in isig()
1111 ldata->echo_head = ldata->echo_tail = 0; in isig()
1112 ldata->echo_mark = ldata->echo_commit = 0; in isig()
1113 mutex_unlock(&ldata->output_lock); in isig()
1144 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_break() local
1153 put_tty_queue('\377', ldata); in n_tty_receive_break()
1154 put_tty_queue('\0', ldata); in n_tty_receive_break()
1156 put_tty_queue('\0', ldata); in n_tty_receive_break()
1171 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_overrun() local
1173 ldata->num_overrun++; in n_tty_receive_overrun()
1174 if (time_is_before_jiffies(ldata->overrun_time + HZ)) { in n_tty_receive_overrun()
1175 tty_warn(tty, "%u input overrun(s)\n", ldata->num_overrun); in n_tty_receive_overrun()
1176 ldata->overrun_time = jiffies; in n_tty_receive_overrun()
1177 ldata->num_overrun = 0; in n_tty_receive_overrun()
1195 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_parity_error() local
1201 put_tty_queue('\377', ldata); in n_tty_receive_parity_error()
1202 put_tty_queue('\0', ldata); in n_tty_receive_parity_error()
1203 put_tty_queue(c, ldata); in n_tty_receive_parity_error()
1205 put_tty_queue('\0', ldata); in n_tty_receive_parity_error()
1207 put_tty_queue(c, ldata); in n_tty_receive_parity_error()
1265 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_handle_newline() local
1267 set_bit(MASK(ldata->read_head), ldata->read_flags); in n_tty_receive_handle_newline()
1268 put_tty_queue(c, ldata); in n_tty_receive_handle_newline()
1269 smp_store_release(&ldata->canon_head, ldata->read_head); in n_tty_receive_handle_newline()
1276 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_char_canon() local
1287 ldata->lnext = 1; in n_tty_receive_char_canon()
1289 finish_erasing(ldata); in n_tty_receive_char_canon()
1291 echo_char_raw('^', ldata); in n_tty_receive_char_canon()
1292 echo_char_raw('\b', ldata); in n_tty_receive_char_canon()
1301 size_t tail = ldata->canon_head; in n_tty_receive_char_canon()
1303 finish_erasing(ldata); in n_tty_receive_char_canon()
1305 echo_char_raw('\n', ldata); in n_tty_receive_char_canon()
1306 while (MASK(tail) != MASK(ldata->read_head)) { in n_tty_receive_char_canon()
1307 echo_char(read_buf(ldata, tail), tty); in n_tty_receive_char_canon()
1317 echo_char_raw('\n', ldata); in n_tty_receive_char_canon()
1339 if (ldata->canon_head == ldata->read_head) in n_tty_receive_char_canon()
1340 echo_set_canon_col(ldata); in n_tty_receive_char_canon()
1349 put_tty_queue(c, ldata); in n_tty_receive_char_canon()
1362 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_char_special() local
1393 if (ldata->icanon && n_tty_receive_char_canon(tty, c)) in n_tty_receive_char_special()
1397 finish_erasing(ldata); in n_tty_receive_char_special()
1399 echo_char_raw('\n', ldata); in n_tty_receive_char_special()
1402 if (ldata->canon_head == ldata->read_head) in n_tty_receive_char_special()
1403 echo_set_canon_col(ldata); in n_tty_receive_char_special()
1411 put_tty_queue(c, ldata); in n_tty_receive_char_special()
1413 put_tty_queue(c, ldata); in n_tty_receive_char_special()
1430 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_char() local
1437 finish_erasing(ldata); in n_tty_receive_char()
1439 if (ldata->canon_head == ldata->read_head) in n_tty_receive_char()
1440 echo_set_canon_col(ldata); in n_tty_receive_char()
1446 put_tty_queue(c, ldata); in n_tty_receive_char()
1447 put_tty_queue(c, ldata); in n_tty_receive_char()
1492 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_char_lnext() local
1494 ldata->lnext = 0; in n_tty_receive_char_lnext()
1509 struct n_tty_data *ldata = tty->disc_data; in n_tty_lookahead_flow_ctrl() local
1512 ldata->lookahead_count += count; in n_tty_lookahead_flow_ctrl()
1530 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_buf_real_raw() local
1534 size_t head = MASK(ldata->read_head); in n_tty_receive_buf_real_raw()
1537 memcpy(read_buf_addr(ldata, head), cp, n); in n_tty_receive_buf_real_raw()
1539 ldata->read_head += n; in n_tty_receive_buf_real_raw()
1549 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_buf_raw() local
1556 put_tty_queue(*cp++, ldata); in n_tty_receive_buf_raw()
1580 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_buf_standard() local
1589 if (ldata->lnext) { in n_tty_receive_buf_standard()
1604 put_tty_queue(c, ldata); in n_tty_receive_buf_standard()
1608 if (test_bit(c, ldata->char_map)) in n_tty_receive_buf_standard()
1618 struct n_tty_data *ldata = tty->disc_data; in __receive_buf() local
1620 size_t la_count = min(ldata->lookahead_count, count); in __receive_buf()
1622 if (ldata->real_raw) in __receive_buf()
1624 else if (ldata->raw || (L_EXTPROC(tty) && !preops)) in __receive_buf()
1642 ldata->lookahead_count -= la_count; in __receive_buf()
1644 if (ldata->icanon && !L_EXTPROC(tty)) in __receive_buf()
1648 smp_store_release(&ldata->commit_head, ldata->read_head); in __receive_buf()
1650 if (read_cnt(ldata)) { in __receive_buf()
1693 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_buf_common() local
1713 size_t tail = smp_load_acquire(&ldata->read_tail); in n_tty_receive_buf_common()
1715 room = N_TTY_BUF_SIZE - (ldata->read_head - tail); in n_tty_receive_buf_common()
1720 overflow = ldata->icanon && ldata->canon_head == tail; in n_tty_receive_buf_common()
1722 ldata->read_head--; in n_tty_receive_buf_common()
1724 WRITE_ONCE(ldata->no_room, flow && !room); in n_tty_receive_buf_common()
1755 if (unlikely(ldata->no_room)) { in n_tty_receive_buf_common()
1797 struct n_tty_data *ldata = tty->disc_data; in n_tty_set_termios() local
1800 bitmap_zero(ldata->read_flags, N_TTY_BUF_SIZE); in n_tty_set_termios()
1801 ldata->line_start = ldata->read_tail; in n_tty_set_termios()
1802 if (!L_ICANON(tty) || !read_cnt(ldata)) { in n_tty_set_termios()
1803 ldata->canon_head = ldata->read_tail; in n_tty_set_termios()
1804 ldata->push = 0; in n_tty_set_termios()
1806 set_bit(MASK(ldata->read_head - 1), ldata->read_flags); in n_tty_set_termios()
1807 ldata->canon_head = ldata->read_head; in n_tty_set_termios()
1808 ldata->push = 1; in n_tty_set_termios()
1810 ldata->commit_head = ldata->read_head; in n_tty_set_termios()
1811 ldata->erasing = 0; in n_tty_set_termios()
1812 ldata->lnext = 0; in n_tty_set_termios()
1815 ldata->icanon = (L_ICANON(tty) != 0); in n_tty_set_termios()
1821 bitmap_zero(ldata->char_map, 256); in n_tty_set_termios()
1824 set_bit('\r', ldata->char_map); in n_tty_set_termios()
1826 set_bit('\n', ldata->char_map); in n_tty_set_termios()
1829 set_bit(ERASE_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1830 set_bit(KILL_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1831 set_bit(EOF_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1832 set_bit('\n', ldata->char_map); in n_tty_set_termios()
1833 set_bit(EOL_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1835 set_bit(WERASE_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1836 set_bit(LNEXT_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1837 set_bit(EOL2_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1840 ldata->char_map); in n_tty_set_termios()
1844 set_bit(START_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1845 set_bit(STOP_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1848 set_bit(INTR_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1849 set_bit(QUIT_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1850 set_bit(SUSP_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1852 clear_bit(__DISABLED_CHAR, ldata->char_map); in n_tty_set_termios()
1853 ldata->raw = 0; in n_tty_set_termios()
1854 ldata->real_raw = 0; in n_tty_set_termios()
1856 ldata->raw = 1; in n_tty_set_termios()
1860 ldata->real_raw = 1; in n_tty_set_termios()
1862 ldata->real_raw = 0; in n_tty_set_termios()
1888 struct n_tty_data *ldata = tty->disc_data; in n_tty_close() local
1894 vfree(ldata); in n_tty_close()
1909 struct n_tty_data *ldata; in n_tty_open() local
1912 ldata = vzalloc(sizeof(*ldata)); in n_tty_open()
1913 if (!ldata) in n_tty_open()
1916 ldata->overrun_time = jiffies; in n_tty_open()
1917 mutex_init(&ldata->atomic_read_lock); in n_tty_open()
1918 mutex_init(&ldata->output_lock); in n_tty_open()
1920 tty->disc_data = ldata; in n_tty_open()
1931 const struct n_tty_data *ldata = tty->disc_data; in input_available_p() local
1934 if (ldata->icanon && !L_EXTPROC(tty)) in input_available_p()
1935 return ldata->canon_head != ldata->read_tail; in input_available_p()
1937 return ldata->commit_head - ldata->read_tail >= amt; in input_available_p()
1962 struct n_tty_data *ldata = tty->disc_data; in copy_from_read_buf() local
1965 size_t head = smp_load_acquire(&ldata->commit_head); in copy_from_read_buf()
1966 size_t tail = MASK(ldata->read_tail); in copy_from_read_buf()
1968 n = min(head - ldata->read_tail, N_TTY_BUF_SIZE - tail); in copy_from_read_buf()
1971 u8 *from = read_buf_addr(ldata, tail); in copy_from_read_buf()
1976 smp_store_release(&ldata->read_tail, ldata->read_tail + n); in copy_from_read_buf()
1978 if (L_EXTPROC(tty) && ldata->icanon && is_eof && in copy_from_read_buf()
1979 (head == ldata->read_tail)) in copy_from_read_buf()
1985 return head != ldata->read_tail; in copy_from_read_buf()
2015 struct n_tty_data *ldata = tty->disc_data; in canon_copy_from_read_buf() local
2025 canon_head = smp_load_acquire(&ldata->canon_head); in canon_copy_from_read_buf()
2026 n = min(*nr, canon_head - ldata->read_tail); in canon_copy_from_read_buf()
2028 tail = MASK(ldata->read_tail); in canon_copy_from_read_buf()
2034 eol = find_next_bit(ldata->read_flags, size, tail); in canon_copy_from_read_buf()
2038 eol = find_first_bit(ldata->read_flags, more); in canon_copy_from_read_buf()
2048 if (!found || read_buf(ldata, eol) != __DISABLED_CHAR) in canon_copy_from_read_buf()
2059 clear_bit(eol, ldata->read_flags); in canon_copy_from_read_buf()
2060 smp_store_release(&ldata->read_tail, ldata->read_tail + c); in canon_copy_from_read_buf()
2063 if (!ldata->push) in canon_copy_from_read_buf()
2064 ldata->line_start = ldata->read_tail; in canon_copy_from_read_buf()
2066 ldata->push = 0; in canon_copy_from_read_buf()
2072 return ldata->read_tail != canon_head; in canon_copy_from_read_buf()
2080 static void canon_skip_eof(struct n_tty_data *ldata) in canon_skip_eof() argument
2084 canon_head = smp_load_acquire(&ldata->canon_head); in canon_skip_eof()
2085 tail = ldata->read_tail; in canon_skip_eof()
2093 if (!test_bit(tail, ldata->read_flags)) in canon_skip_eof()
2095 if (read_buf(ldata, tail) != __DISABLED_CHAR) in canon_skip_eof()
2099 clear_bit(tail, ldata->read_flags); in canon_skip_eof()
2100 smp_store_release(&ldata->read_tail, ldata->read_tail + 1); in canon_skip_eof()
2154 struct n_tty_data *ldata = tty->disc_data; in n_tty_read() local
2171 if (ldata->icanon && !L_EXTPROC(tty)) { in n_tty_read()
2178 canon_skip_eof(ldata); in n_tty_read()
2190 mutex_unlock(&ldata->atomic_read_lock); in n_tty_read()
2203 if (!mutex_trylock(&ldata->atomic_read_lock)) in n_tty_read()
2206 if (mutex_lock_interruptible(&ldata->atomic_read_lock)) in n_tty_read()
2214 if (!ldata->icanon) { in n_tty_read()
2225 old_tail = ldata->read_tail; in n_tty_read()
2280 if (ldata->icanon && !L_EXTPROC(tty)) { in n_tty_read()
2314 if (old_tail != ldata->read_tail) { in n_tty_read()
2325 mutex_unlock(&ldata->atomic_read_lock); in n_tty_read()
2402 struct n_tty_data *ldata = tty->disc_data; in n_tty_write() local
2405 mutex_lock(&ldata->output_lock); in n_tty_write()
2407 mutex_unlock(&ldata->output_lock); in n_tty_write()
2479 static unsigned long inq_canon(struct n_tty_data *ldata) in inq_canon() argument
2483 if (ldata->canon_head == ldata->read_tail) in inq_canon()
2485 head = ldata->canon_head; in inq_canon()
2486 tail = ldata->read_tail; in inq_canon()
2490 if (test_bit(MASK(tail), ldata->read_flags) && in inq_canon()
2491 read_buf(ldata, tail) == __DISABLED_CHAR) in inq_canon()
2501 struct n_tty_data *ldata = tty->disc_data; in n_tty_ioctl() local
2510 retval = inq_canon(ldata); in n_tty_ioctl()
2512 retval = read_cnt(ldata); in n_tty_ioctl()