From: Sean Young <sean@mess.org>
To: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
Alexei Starovoitov <ast@kernel.org>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
netdev@vger.kernel.org, Matthias Reichl <hias@horus.com>,
Devin Heitmueller <dheitmueller@kernellabs.com>
Subject: [PATCH v1 0/4] IR decoding using BPF
Date: Mon, 14 May 2018 22:10:57 +0100 [thread overview]
Message-ID: <cover.1526331777.git.sean@mess.org> (raw)
The kernel IR decoders support the most widely used IR protocols, but there
are many protocols which are not supported[1]. For example, the
lirc-remotes[2] repo has over 2700 remotes, many of which are not supported
by rc-core. There is a "long tail" of unsupported IR protocols.
IR encoding is done in such a way that some simple circuit can decode it;
therefore, bpf is ideal.
In order to support all these protocols, here we have bpf based IR decoding.
The idea is that user-space can define a decoder in bpf, attach it to
the rc device through the lirc chardev.
Separate work is underway to extend ir-keytable to have an extensive library
of bpf-based decoders, and a much expanded library of rc keymaps.
Another future application would be to compile IRP[3] to a IR BPF program, and
so support virtually every remote without having to write a decoder for each.
Thanks,
Sean Young
[1] http://www.hifi-remote.com/wiki/index.php?title=DecodeIR
[2] https://sourceforge.net/p/lirc-remotes/code/ci/master/tree/remotes/
[3] http://www.hifi-remote.com/wiki/index.php?title=IRP_Notation
Sean Young (4):
media: rc: introduce BPF_PROG_IR_DECODER
media: bpf: allow raw IR decoder bpf programs to be used
media: rc bpf: move ir_raw_event to uapi
samples/bpf: an example of a raw IR decoder
drivers/media/rc/Kconfig | 8 +
drivers/media/rc/Makefile | 1 +
drivers/media/rc/ir-bpf-decoder.c | 284 ++++++++++++++++++++++
drivers/media/rc/lirc_dev.c | 30 +++
drivers/media/rc/rc-core-priv.h | 15 ++
drivers/media/rc/rc-ir-raw.c | 5 +
include/linux/bpf_types.h | 3 +
include/media/rc-core.h | 19 +-
include/uapi/linux/bpf.h | 17 +-
include/uapi/linux/bpf_rcdev.h | 24 ++
kernel/bpf/syscall.c | 7 +
samples/bpf/Makefile | 4 +
samples/bpf/bpf_load.c | 9 +-
samples/bpf/grundig_decoder_kern.c | 112 +++++++++
samples/bpf/grundig_decoder_user.c | 54 ++++
tools/bpf/bpftool/prog.c | 1 +
tools/include/uapi/linux/bpf.h | 17 +-
tools/testing/selftests/bpf/bpf_helpers.h | 6 +
18 files changed, 594 insertions(+), 22 deletions(-)
create mode 100644 drivers/media/rc/ir-bpf-decoder.c
create mode 100644 include/uapi/linux/bpf_rcdev.h
create mode 100644 samples/bpf/grundig_decoder_kern.c
create mode 100644 samples/bpf/grundig_decoder_user.c
--
2.17.0
next reply other threads:[~2018-05-14 21:11 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-14 21:10 Sean Young [this message]
2018-05-14 21:10 ` [PATCH v1 1/4] media: rc: introduce BPF_PROG_IR_DECODER Sean Young
2018-05-14 23:27 ` Randy Dunlap
2018-05-15 12:19 ` Sean Young
2018-05-15 4:48 ` Y Song
2018-05-15 10:30 ` Sean Young
2018-05-14 21:10 ` [PATCH v1 2/4] media: bpf: allow raw IR decoder bpf programs to be used Sean Young
2018-05-15 2:34 ` kbuild test robot
2018-05-15 5:22 ` Y Song
2018-05-14 21:11 ` [PATCH v1 3/4] media: rc bpf: move ir_raw_event to uapi Sean Young
2018-05-15 1:59 ` kbuild test robot
2018-05-15 5:26 ` Y Song
2018-05-14 21:11 ` [PATCH v1 4/4] samples/bpf: an example of a raw IR decoder Sean Young
2018-05-15 5:34 ` Y Song
2018-05-15 10:40 ` Sean Young
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