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authorLinus Torvalds <torvalds@linux-foundation.org>2026-08-24 08:46:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2026-08-24 08:46:03 -0700
commitcf9610f9116d55c5a66ef9f1faecacabd93a9322 (patch)
tree757a3d280760c654767631cab5ad8af2d86d1848 /samples/hid/hid_mouse.bpf.c
downloadlinux-stable-cf9610f9116d55c5a66ef9f1faecacabd93a9322.tar.gz
linux-stable-cf9610f9116d55c5a66ef9f1faecacabd93a9322.zip
Merge tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrlgrafted
Pull pin control updates from Linus Walleij: "Core changes: - Use the non-blocking mux_state_try_select() in the generic MUX pin control back-end - Free pin maps on pinctrl_generic_to_map() failure in the core helpers New hardware pin control: - Qualcomm Maili TLMM SoC, PMG1110 PMIC, and Eliza LPASS LPI TLMM SoC (this is for the low power audio, LPASS = Low Power Audio SubSystem portions) - Upboard support on top of the Intel pin controller - Apple T6030 and T6031 support (just compatible strings) - Samsung Exynos 8855 SoC - Mediatek MT6858 SoC - Rockchip RK3308B and RV1106 SoCs - Airoha EN7523 and AN7563 SoCs Improvements: - Qualcomm TLMM GPIOs are unconditionally marked as wakeup capable - Qualcomm improvements on top of the Qualcomm PDC (power domain controller) irqchip improvements from tglx:s tree - Qualcomm IPQ806x and IPQ9650 non-urgent pin grop fixups - The NPCM8xx driver has been put into shape fixing many pin and group definitions - Some non-urgent Tegra 264 pin assignments are fixed up - Some non-urgent fixups to Airoha AN7581 and AN7583 registers and pin assignments, missing features etc" * tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (130 commits) dt-bindings: pinctrl: Convert TI DA850 pupd to DT schema pinctrl: meson: sync some modify from A4 pinctrl: meson: a4: Add input enable pin configuration pinctrl: realtek: rtd1625: remove unused group name spdif_sel pinctrl: realtek: rtd1625: fix base_bit for VE4 GPIO 13 dt-bindings: pinctrl: microchip,pic32mzda-pinctrl: Convert to DT schema Revert "Merge branch 'ib-rsk7204' into devel" pinctrl: rockchip: Add RV1106 pinctrl support dt-bindings: pinctrl: rockchip: Add RV1106 compatible pinctrl: rockchip: Decode drive strength in the get function pinctrl: fix PINCTRL_GENERIC_MUX not always being selectable pinctrl: airoha: add support of an7563 SoC dt-bindings: pinctrl: airoha: add support of an7563 pin controller pinctrl: airoha: try to find chip scu node by phandle first pinctrl: airoha: add support of en7523 SoC dt-bindings: pinctrl: airoha: add support of en7523 pin controller pinctrl: airoha: an7583: add support for olt pinmux pinctrl: airoha: an7583: add support for pon_alt pinmux pinctrl: airoha: an7583: add support for npu_uart pinmux dt-bindings: pinctrl: airoha: an7583: add missed features ...
Diffstat (limited to 'samples/hid/hid_mouse.bpf.c')
-rw-r--r--samples/hid/hid_mouse.bpf.c128
1 files changed, 128 insertions, 0 deletions
diff --git a/samples/hid/hid_mouse.bpf.c b/samples/hid/hid_mouse.bpf.c
new file mode 100644
index 000000000..f7f722dcf
--- /dev/null
+++ b/samples/hid/hid_mouse.bpf.c
@@ -0,0 +1,128 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include "vmlinux.h"
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+#include "hid_bpf_helpers.h"
+
+static int hid_y_event(struct hid_bpf_ctx *hctx)
+{
+ s16 y;
+ __u8 *data = hid_bpf_get_data(hctx, 0 /* offset */, 9 /* size */);
+
+ if (!data)
+ return 0; /* EPERM check */
+
+ bpf_printk("event: size: %d", hctx->size);
+ bpf_printk("incoming event: %02x %02x %02x",
+ data[0],
+ data[1],
+ data[2]);
+ bpf_printk(" %02x %02x %02x",
+ data[3],
+ data[4],
+ data[5]);
+ bpf_printk(" %02x %02x %02x",
+ data[6],
+ data[7],
+ data[8]);
+
+ y = data[3] | (data[4] << 8);
+
+ y = -y;
+
+ data[3] = y & 0xFF;
+ data[4] = (y >> 8) & 0xFF;
+
+ bpf_printk("modified event: %02x %02x %02x",
+ data[0],
+ data[1],
+ data[2]);
+ bpf_printk(" %02x %02x %02x",
+ data[3],
+ data[4],
+ data[5]);
+ bpf_printk(" %02x %02x %02x",
+ data[6],
+ data[7],
+ data[8]);
+
+ return 0;
+}
+
+static int hid_x_event(struct hid_bpf_ctx *hctx)
+{
+ s16 x;
+ __u8 *data = hid_bpf_get_data(hctx, 0 /* offset */, 9 /* size */);
+
+ if (!data)
+ return 0; /* EPERM check */
+
+ x = data[1] | (data[2] << 8);
+
+ x = -x;
+
+ data[1] = x & 0xFF;
+ data[2] = (x >> 8) & 0xFF;
+ return 0;
+}
+
+SEC("struct_ops/hid_device_event")
+int BPF_PROG(hid_event, struct hid_bpf_ctx *hctx, enum hid_report_type type)
+{
+ int ret = hid_y_event(hctx);
+
+ if (ret)
+ return ret;
+
+ return hid_x_event(hctx);
+}
+
+
+SEC("struct_ops/hid_rdesc_fixup")
+int BPF_PROG(hid_rdesc_fixup, struct hid_bpf_ctx *hctx)
+{
+ __u8 *data = hid_bpf_get_data(hctx, 0 /* offset */, 4096 /* size */);
+
+ if (!data)
+ return 0; /* EPERM check */
+
+ bpf_printk("rdesc: %02x %02x %02x",
+ data[0],
+ data[1],
+ data[2]);
+ bpf_printk(" %02x %02x %02x",
+ data[3],
+ data[4],
+ data[5]);
+ bpf_printk(" %02x %02x %02x ...",
+ data[6],
+ data[7],
+ data[8]);
+
+ /*
+ * The original report descriptor contains:
+ *
+ * 0x05, 0x01, // Usage Page (Generic Desktop) 30
+ * 0x16, 0x01, 0x80, // Logical Minimum (-32767) 32
+ * 0x26, 0xff, 0x7f, // Logical Maximum (32767) 35
+ * 0x09, 0x30, // Usage (X) 38
+ * 0x09, 0x31, // Usage (Y) 40
+ *
+ * So byte 39 contains Usage X and byte 41 Usage Y.
+ *
+ * We simply swap the axes here.
+ */
+ data[39] = 0x31;
+ data[41] = 0x30;
+
+ return 0;
+}
+
+SEC(".struct_ops.link")
+struct hid_bpf_ops mouse_invert = {
+ .hid_rdesc_fixup = (void *)hid_rdesc_fixup,
+ .hid_device_event = (void *)hid_event,
+};
+
+char _license[] SEC("license") = "GPL";