[09/18] HID: bpf: add in-tree HID-BPF fix for the Raptor Mach 2

Message ID	20240410-bpf_sources-v1-9-a8bf16033ef8@kernel.org (mailing list archive)
State	Mainlined
Commit	0cd1465cac52d7d5b4584a29f97bddc5e8bb421f
Delegated to:	Jiri Kosina
Headers	show Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 79792181B92; Wed, 10 Apr 2024 17:20:10 +0000 (UTC) From: Benjamin Tissoires <bentiss@kernel.org> Date: Wed, 10 Apr 2024 19:19:29 +0200 Subject: [PATCH 09/18] HID: bpf: add in-tree HID-BPF fix for the Raptor Mach 2 Precedence: bulk MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20240410-bpf_sources-v1-9-a8bf16033ef8@kernel.org> References: <20240410-bpf_sources-v1-0-a8bf16033ef8@kernel.org> In-Reply-To: <20240410-bpf_sources-v1-0-a8bf16033ef8@kernel.org> To: Jiri Kosina <jikos@kernel.org>, Benjamin Tissoires <bentiss@kernel.org>, Shuah Khan <shuah@kernel.org>, Peter Hutterer <peter.hutterer@who-t.net> Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org
Series	HID: Include current HID-BPF fixes in tree \| expand [00/18] HID: Include current HID-BPF fixes in tree [01/18] HID: do not assume HAT Switch logical max < 8 [02/18] HID: bpf: add first in-tree HID-BPF fix for the XPPen Artist 24 [03/18] HID: bpf: add in-tree HID-BPF fix for the XPPen Artist 16 [04/18] HID: bpf: add in-tree HID-BPF fix for the HP Elite Presenter Mouse [05/18] HID: bpf: add in-tree HID-BPF fix for the IOGear Kaliber Gaming MMOmentum mouse [06/18] HID: bpf: add in-tree HID-BPF fix for the Wacom ArtPen [07/18] HID: bpf: add in-tree HID-BPF fix for the XBox Elite 2 over Bluetooth [08/18] HID: bpf: add in-tree HID-BPF fix for the Huion Kamvas Pro 19 [09/18] HID: bpf: add in-tree HID-BPF fix for the Raptor Mach 2 [10/18] selftests/hid: import base_device.py from hid-tools [11/18] selftests/hid: add support for HID-BPF pre-loading before starting a test [12/18] selftests/hid: tablets: reduce the number of pen state [13/18] selftests/hid: tablets: add a couple of XP-PEN tablets [14/18] selftests/hid: tablets: also check for XP-Pen offset correction [15/18] selftests/hid: add Huion Kamvas Pro 19 tests [16/18] selftests/hid: import base_gamepad.py from hid-tools [17/18] selftests/hid: move the gamepads definitions in the test file [18/18] selftests/hid: add tests for the Raptor Mach 2 joystick [19/18] selftests/hid: skip tests with HID-BPF if udev-hid-bpf is not installed

diff --git a/drivers/hid/bpf/progs/FR-TEC__Raptor-Mach-2.bpf.c b/drivers/hid/bpf/progs/FR-TEC__Raptor-Mach-2.bpf.c new file mode 100644 index 000000000000..dc26a7677d36 --- /dev/null +++ b/drivers/hid/bpf/progs/FR-TEC__Raptor-Mach-2.bpf.c @@ -0,0 +1,185 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Copyright (c) 2024 Benjamin Tissoires + */ + +#include "vmlinux.h" +#include "hid_bpf.h" +#include "hid_bpf_helpers.h" +#include <bpf/bpf_tracing.h> + +#define VID_BETOP_2185PC 0x11C0 +#define PID_RAPTOR_MACH_2 0x5606 + +HID_BPF_CONFIG( + HID_DEVICE(BUS_USB, HID_GROUP_GENERIC, VID_BETOP_2185PC, PID_RAPTOR_MACH_2), +); + +/* + * For reference, this is the fixed report descriptor + * + * static const __u8 fixed_rdesc[] = { + * 0x05, 0x01, // Usage Page (Generic Desktop) 0 + * 0x09, 0x04, // Usage (Joystick) 2 + * 0xa1, 0x01, // Collection (Application) 4 + * 0x05, 0x01, // Usage Page (Generic Desktop) 6 + * 0x85, 0x01, // Report ID (1) 8 + * 0x05, 0x01, // Usage Page (Generic Desktop) 10 + * 0x09, 0x30, // Usage (X) 12 + * 0x75, 0x10, // Report Size (16) 14 + * 0x95, 0x01, // Report Count (1) 16 + * 0x15, 0x00, // Logical Minimum (0) 18 + * 0x26, 0xff, 0x07, // Logical Maximum (2047) 20 + * 0x46, 0xff, 0x07, // Physical Maximum (2047) 23 + * 0x81, 0x02, // Input (Data,Var,Abs) 26 + * 0x05, 0x01, // Usage Page (Generic Desktop) 28 + * 0x09, 0x31, // Usage (Y) 30 + * 0x75, 0x10, // Report Size (16) 32 + * 0x95, 0x01, // Report Count (1) 34 + * 0x15, 0x00, // Logical Minimum (0) 36 + * 0x26, 0xff, 0x07, // Logical Maximum (2047) 38 + * 0x46, 0xff, 0x07, // Physical Maximum (2047) 41 + * 0x81, 0x02, // Input (Data,Var,Abs) 44 + * 0x05, 0x01, // Usage Page (Generic Desktop) 46 + * 0x09, 0x33, // Usage (Rx) 48 + * 0x75, 0x10, // Report Size (16) 50 + * 0x95, 0x01, // Report Count (1) 52 + * 0x15, 0x00, // Logical Minimum (0) 54 + * 0x26, 0xff, 0x03, // Logical Maximum (1023) 56 + * 0x46, 0xff, 0x03, // Physical Maximum (1023) 59 + * 0x81, 0x02, // Input (Data,Var,Abs) 62 + * 0x05, 0x00, // Usage Page (Undefined) 64 + * 0x09, 0x00, // Usage (Undefined) 66 + * 0x75, 0x10, // Report Size (16) 68 + * 0x95, 0x01, // Report Count (1) 70 + * 0x15, 0x00, // Logical Minimum (0) 72 + * 0x26, 0xff, 0x03, // Logical Maximum (1023) 74 + * 0x46, 0xff, 0x03, // Physical Maximum (1023) 77 + * 0x81, 0x02, // Input (Data,Var,Abs) 80 + * 0x05, 0x01, // Usage Page (Generic Desktop) 82 + * 0x09, 0x32, // Usage (Z) 84 + * 0x75, 0x10, // Report Size (16) 86 + * 0x95, 0x01, // Report Count (1) 88 + * 0x15, 0x00, // Logical Minimum (0) 90 + * 0x26, 0xff, 0x03, // Logical Maximum (1023) 92 + * 0x46, 0xff, 0x03, // Physical Maximum (1023) 95 + * 0x81, 0x02, // Input (Data,Var,Abs) 98 + * 0x05, 0x01, // Usage Page (Generic Desktop) 100 + * 0x09, 0x35, // Usage (Rz) 102 + * 0x75, 0x10, // Report Size (16) 104 + * 0x95, 0x01, // Report Count (1) 106 + * 0x15, 0x00, // Logical Minimum (0) 108 + * 0x26, 0xff, 0x03, // Logical Maximum (1023) 110 + * 0x46, 0xff, 0x03, // Physical Maximum (1023) 113 + * 0x81, 0x02, // Input (Data,Var,Abs) 116 + * 0x05, 0x01, // Usage Page (Generic Desktop) 118 + * 0x09, 0x34, // Usage (Ry) 120 + * 0x75, 0x10, // Report Size (16) 122 + * 0x95, 0x01, // Report Count (1) 124 + * 0x15, 0x00, // Logical Minimum (0) 126 + * 0x26, 0xff, 0x07, // Logical Maximum (2047) 128 + * 0x46, 0xff, 0x07, // Physical Maximum (2047) 131 + * 0x81, 0x02, // Input (Data,Var,Abs) 134 + * 0x05, 0x01, // Usage Page (Generic Desktop) 136 + * 0x09, 0x36, // Usage (Slider) 138 + * 0x75, 0x10, // Report Size (16) 140 + * 0x95, 0x01, // Report Count (1) 142 + * 0x15, 0x00, // Logical Minimum (0) 144 + * 0x26, 0xff, 0x03, // Logical Maximum (1023) 146 + * 0x46, 0xff, 0x03, // Physical Maximum (1023) 149 + * 0x81, 0x02, // Input (Data,Var,Abs) 152 + * 0x05, 0x09, // Usage Page (Button) 154 + * 0x19, 0x01, // Usage Minimum (1) 156 + * 0x2a, 0x1d, 0x00, // Usage Maximum (29) 158 + * 0x15, 0x00, // Logical Minimum (0) 161 + * 0x25, 0x01, // Logical Maximum (1) 163 + * 0x75, 0x01, // Report Size (1) 165 + * 0x96, 0x80, 0x00, // Report Count (128) 167 + * 0x81, 0x02, // Input (Data,Var,Abs) 170 + * 0x05, 0x01, // Usage Page (Generic Desktop) 172 + * 0x09, 0x39, // Usage (Hat switch) 174 + * 0x26, 0x07, 0x00, // Logical Maximum (7) 176 // changed (was 239) + * 0x46, 0x68, 0x01, // Physical Maximum (360) 179 + * 0x65, 0x14, // Unit (EnglishRotation: deg) 182 + * 0x75, 0x10, // Report Size (16) 184 + * 0x95, 0x01, // Report Count (1) 186 + * 0x81, 0x42, // Input (Data,Var,Abs,Null) 188 + * 0x05, 0x01, // Usage Page (Generic Desktop) 190 + * 0x09, 0x00, // Usage (Undefined) 192 + * 0x75, 0x08, // Report Size (8) 194 + * 0x95, 0x1d, // Report Count (29) 196 + * 0x81, 0x01, // Input (Cnst,Arr,Abs) 198 + * 0x15, 0x00, // Logical Minimum (0) 200 + * 0x26, 0xef, 0x00, // Logical Maximum (239) 202 + * 0x85, 0x58, // Report ID (88) 205 + * 0x26, 0xff, 0x00, // Logical Maximum (255) 207 + * 0x46, 0xff, 0x00, // Physical Maximum (255) 210 + * 0x75, 0x08, // Report Size (8) 213 + * 0x95, 0x3f, // Report Count (63) 215 + * 0x09, 0x00, // Usage (Undefined) 217 + * 0x91, 0x02, // Output (Data,Var,Abs) 219 + * 0x85, 0x59, // Report ID (89) 221 + * 0x75, 0x08, // Report Size (8) 223 + * 0x95, 0x80, // Report Count (128) 225 + * 0x09, 0x00, // Usage (Undefined) 227 + * 0xb1, 0x02, // Feature (Data,Var,Abs) 229 + * 0xc0, // End Collection 231 + * }; + */ + +/* + * We need to amend the report descriptor for the following: + * - the joystick sends its hat_switch data between 0 and 239 but + * the kernel expects the logical max to stick into a signed 8 bits + * integer. We thus divide it by 30 to match what other joysticks are + * doing + */ +SEC("fmod_ret/hid_bpf_rdesc_fixup") +int BPF_PROG(hid_fix_rdesc_raptor_mach_2, struct hid_bpf_ctx *hctx) +{ + __u8 *data = hid_bpf_get_data(hctx, 0 /* offset */, HID_MAX_DESCRIPTOR_SIZE /* size */); + + if (!data) + return 0; /* EPERM check */ + + data[177] = 0x07; + + return 0; +} + +/* + * The hat_switch value at offsets 33 and 34 (16 bits) needs + * to be reduced to a single 8 bit signed integer. So we + * divide it by 30. + * Byte 34 is always null, so it is ignored. + */ +SEC("fmod_ret/hid_bpf_device_event") +int BPF_PROG(raptor_mach_2_fix_hat_switch, struct hid_bpf_ctx *hctx) +{ + __u8 *data = hid_bpf_get_data(hctx, 0 /* offset */, 64 /* size */); + + if (!data) + return 0; /* EPERM check */ + + if (data[0] != 0x01) /* not the joystick report ID */ + return 0; + + data[33] /= 30; + + return 0; +} + +SEC("syscall") +int probe(struct hid_bpf_probe_args *ctx) +{ + ctx->retval = ctx->rdesc_size != 232; + if (ctx->retval) + ctx->retval = -EINVAL; + + /* ensure the kernel isn't fixed already */ + if (ctx->rdesc[177] != 0xef) /* Logical Max of 239 */ + ctx->retval = -EINVAL; + + return 0; +} + +char _license[] SEC("license") = "GPL";

[09/18] HID: bpf: add in-tree HID-BPF fix for the Raptor Mach 2

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