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| author | Sean Young <sean@mess.org> | 2018-05-27 12:24:09 +0100 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-05-30 12:38:40 +0200 |
| commit | f4364dcfc86df7c1ca47b256eaf6b6d0cdd0d936 (patch) | |
| tree | aa0d09b48734429acec8d26b703db839fcc655de /drivers/media/rc/rc-core-priv.h | |
| parent | 170a7e3ea0709eae12c8f944b9f33c54fe80c6c1 (diff) | |
| download | lwn-f4364dcfc86df7c1ca47b256eaf6b6d0cdd0d936.tar.gz lwn-f4364dcfc86df7c1ca47b256eaf6b6d0cdd0d936.zip | |
media: rc: introduce BPF_PROG_LIRC_MODE2
Add support for BPF_PROG_LIRC_MODE2. This type of BPF program can call
rc_keydown() to reported decoded IR scancodes, or rc_repeat() to report
that the last key should be repeated.
The bpf program can be attached to using the bpf(BPF_PROG_ATTACH) syscall;
the target_fd must be the /dev/lircN device.
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'drivers/media/rc/rc-core-priv.h')
| -rw-r--r-- | drivers/media/rc/rc-core-priv.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/media/rc/rc-core-priv.h b/drivers/media/rc/rc-core-priv.h index e0e6a17460f6..eb004757038b 100644 --- a/drivers/media/rc/rc-core-priv.h +++ b/drivers/media/rc/rc-core-priv.h @@ -13,6 +13,7 @@ #define MAX_IR_EVENT_SIZE 512 #include <linux/slab.h> +#include <uapi/linux/bpf.h> #include <media/rc-core.h> /** @@ -57,6 +58,11 @@ struct ir_raw_event_ctrl { /* raw decoder state follows */ struct ir_raw_event prev_ev; struct ir_raw_event this_ev; + +#ifdef CONFIG_BPF_LIRC_MODE2 + u32 bpf_sample; + struct bpf_prog_array __rcu *progs; +#endif struct nec_dec { int state; unsigned count; @@ -126,6 +132,9 @@ struct ir_raw_event_ctrl { } imon; }; +/* Mutex for locking raw IR processing and handler change */ +extern struct mutex ir_raw_handler_lock; + /* macros for IR decoders */ static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin) { @@ -288,6 +297,7 @@ void ir_lirc_raw_event(struct rc_dev *dev, struct ir_raw_event ev); void ir_lirc_scancode_event(struct rc_dev *dev, struct lirc_scancode *lsc); int ir_lirc_register(struct rc_dev *dev); void ir_lirc_unregister(struct rc_dev *dev); +struct rc_dev *rc_dev_get_from_fd(int fd); #else static inline int lirc_dev_init(void) { return 0; } static inline void lirc_dev_exit(void) {} @@ -299,4 +309,15 @@ static inline int ir_lirc_register(struct rc_dev *dev) { return 0; } static inline void ir_lirc_unregister(struct rc_dev *dev) { } #endif +/* + * bpf interface + */ +#ifdef CONFIG_BPF_LIRC_MODE2 +void lirc_bpf_free(struct rc_dev *dev); +void lirc_bpf_run(struct rc_dev *dev, u32 sample); +#else +static inline void lirc_bpf_free(struct rc_dev *dev) { } +static inline void lirc_bpf_run(struct rc_dev *dev, u32 sample) { } +#endif + #endif /* _RC_CORE_PRIV */ |