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SubjectRe: [PATCH v1 1/4] media: rc: introduce BPF_PROG_IR_DECODER
On Mon, May 14, 2018 at 04:27:19PM -0700, Randy Dunlap wrote:
> On 05/14/2018 02:10 PM, Sean Young wrote:
> > Add support for BPF_PROG_IR_DECODER. This type of BPF program can call
>
> Kconfig file below uses IR_BPF_DECODER instead of the symbol name above.
>
> and then patch 3 says a third choice:
> The context provided to a BPF_PROG_RAWIR_DECODER is a struct ir_raw_event;


Yes, you're right. I guess the source/trigger is raw IR events; decoding
is something you're likely to do, but not necessarily. So:

bpf type: BPF_PROG_TYPE_RAWIR_EVENT, has context struct bpf_rawir_event.

Then we can call the Kconfig option CONFIG_BPF_RAW_IR_EVENT


Sean
>
> > rc_keydown() to reported decoded IR scancodes, or rc_repeat() to report
> > that the last key should be repeated.
> >
> > Signed-off-by: Sean Young <sean@mess.org>
> > ---
> > drivers/media/rc/Kconfig | 8 +++
> > drivers/media/rc/Makefile | 1 +
> > drivers/media/rc/ir-bpf-decoder.c | 93 +++++++++++++++++++++++++++++++
> > include/linux/bpf_types.h | 3 +
> > include/uapi/linux/bpf.h | 16 +++++-
> > 5 files changed, 120 insertions(+), 1 deletion(-)
> > create mode 100644 drivers/media/rc/ir-bpf-decoder.c
> >
> > diff --git a/drivers/media/rc/Kconfig b/drivers/media/rc/Kconfig
> > index eb2c3b6eca7f..10ad6167d87c 100644
> > --- a/drivers/media/rc/Kconfig
> > +++ b/drivers/media/rc/Kconfig
> > @@ -120,6 +120,14 @@ config IR_IMON_DECODER
> > remote control and you would like to use it with a raw IR
> > receiver, or if you wish to use an encoder to transmit this IR.
> >
> > +config IR_BPF_DECODER
> > + bool "Enable IR raw decoder using BPF"
> > + depends on BPF_SYSCALL
> > + depends on RC_CORE=y
> > + help
> > + Enable this option to make it possible to load custom IR
> > + decoders written in BPF.
> > +
> > endif #RC_DECODERS
> >
> > menuconfig RC_DEVICES
> > diff --git a/drivers/media/rc/Makefile b/drivers/media/rc/Makefile
> > index 2e1c87066f6c..12e1118430d0 100644
> > --- a/drivers/media/rc/Makefile
> > +++ b/drivers/media/rc/Makefile
> > @@ -5,6 +5,7 @@ obj-y += keymaps/
> > obj-$(CONFIG_RC_CORE) += rc-core.o
> > rc-core-y := rc-main.o rc-ir-raw.o
> > rc-core-$(CONFIG_LIRC) += lirc_dev.o
> > +rc-core-$(CONFIG_IR_BPF_DECODER) += ir-bpf-decoder.o
>
>
> --
> ~Randy

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