diff options
| author | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2022-11-03 16:57:54 +0100 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2022-11-15 16:28:40 +0100 |
| commit | 6008105b4f4e470da0e9159a3a74ca7ff6e869ba (patch) | |
| tree | c92d7cc2eb6742894183b99c44f574eb8a844adf /samples/hid/hid_bpf_helpers.h | |
| parent | 80e189f2af37d383b4840f3f89896071392cb58f (diff) | |
samples/hid: add new hid BPF example
Everything should be available in the selftest part of the tree, but
providing an example without uhid and hidraw will be more easy to
follow for users.
This example will probably ever only work on the Etekcity Scroll 6E
because we need to adapt the various raw values to the actual device.
On that device, the X and Y axis will be swapped and inverted, and on
any other device, chances are high that the device will not work until
Ctrl-C is hit.
The Makefiles are taken from samples/bpf to not reinvent the wheel and
to force using in-kernel libbpf and bpftool.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'samples/hid/hid_bpf_helpers.h')
| -rw-r--r-- | samples/hid/hid_bpf_helpers.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/samples/hid/hid_bpf_helpers.h b/samples/hid/hid_bpf_helpers.h new file mode 100644 index 000000000000..c555aeef5e37 --- /dev/null +++ b/samples/hid/hid_bpf_helpers.h @@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* Copyright (c) 2022 Benjamin Tissoires + */ + +#ifndef __HID_BPF_HELPERS_H +#define __HID_BPF_HELPERS_H + +/* following are kfuncs exported by HID for HID-BPF */ +extern __u8 *hid_bpf_get_data(struct hid_bpf_ctx *ctx, + unsigned int offset, + const size_t __sz) __ksym; +extern int hid_bpf_attach_prog(unsigned int hid_id, int prog_fd, u32 flags) __ksym; +extern int hid_bpf_hw_request(struct hid_bpf_ctx *ctx, + __u8 *data, + size_t buf__sz, + enum hid_report_type type, + enum hid_class_request reqtype) __ksym; + +#endif /* __HID_BPF_HELPERS_H */ |