162306a36Sopenharmony_ci.. SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci 362306a36Sopenharmony_ci========== 462306a36Sopenharmony_ciTTY Buffer 562306a36Sopenharmony_ci========== 662306a36Sopenharmony_ci 762306a36Sopenharmony_ci.. contents:: :local: 862306a36Sopenharmony_ci 962306a36Sopenharmony_ciHere, we document functions for taking care of tty buffer and their flipping. 1062306a36Sopenharmony_ciDrivers are supposed to fill the buffer by one of those functions below and 1162306a36Sopenharmony_cithen flip the buffer, so that the data are passed to :doc:`line discipline 1262306a36Sopenharmony_ci<tty_ldisc>` for further processing. 1362306a36Sopenharmony_ci 1462306a36Sopenharmony_ciFlip Buffer Management 1562306a36Sopenharmony_ci====================== 1662306a36Sopenharmony_ci 1762306a36Sopenharmony_ci.. kernel-doc:: drivers/tty/tty_buffer.c 1862306a36Sopenharmony_ci :identifiers: tty_prepare_flip_string 1962306a36Sopenharmony_ci tty_flip_buffer_push tty_ldisc_receive_buf 2062306a36Sopenharmony_ci 2162306a36Sopenharmony_ci.. kernel-doc:: include/linux/tty_flip.h 2262306a36Sopenharmony_ci :identifiers: tty_insert_flip_string_fixed_flag tty_insert_flip_string_flags 2362306a36Sopenharmony_ci tty_insert_flip_char 2462306a36Sopenharmony_ci 2562306a36Sopenharmony_ci---- 2662306a36Sopenharmony_ci 2762306a36Sopenharmony_ciOther Functions 2862306a36Sopenharmony_ci=============== 2962306a36Sopenharmony_ci 3062306a36Sopenharmony_ci.. kernel-doc:: drivers/tty/tty_buffer.c 3162306a36Sopenharmony_ci :identifiers: tty_buffer_space_avail tty_buffer_set_limit 3262306a36Sopenharmony_ci 3362306a36Sopenharmony_ci---- 3462306a36Sopenharmony_ci 3562306a36Sopenharmony_ciBuffer Locking 3662306a36Sopenharmony_ci============== 3762306a36Sopenharmony_ci 3862306a36Sopenharmony_ciThese are used only in special circumstances. Avoid them. 3962306a36Sopenharmony_ci 4062306a36Sopenharmony_ci.. kernel-doc:: drivers/tty/tty_buffer.c 4162306a36Sopenharmony_ci :identifiers: tty_buffer_lock_exclusive tty_buffer_unlock_exclusive 4262306a36Sopenharmony_ci 4362306a36Sopenharmony_ci---- 4462306a36Sopenharmony_ci 4562306a36Sopenharmony_ciInternal Functions 4662306a36Sopenharmony_ci================== 4762306a36Sopenharmony_ci 4862306a36Sopenharmony_ci.. kernel-doc:: drivers/tty/tty_buffer.c 4962306a36Sopenharmony_ci :internal: 50