^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (c) 2009, Citrix Systems, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (c) 2010, Microsoft Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2011, Novell Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/completion.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/hid.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/hiddev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/hyperv.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct hv_input_dev_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) unsigned int size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) unsigned short vendor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) unsigned short product;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) unsigned short version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) unsigned short reserved[11];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) /* The maximum size of a synthetic input message. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define SYNTHHID_MAX_INPUT_REPORT_SIZE 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * Current version
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * History:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * Beta, RC < 2008/1/22 1,0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * RC > 2008/1/22 2,0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define SYNTHHID_INPUT_VERSION_MAJOR 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define SYNTHHID_INPUT_VERSION_MINOR 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define SYNTHHID_INPUT_VERSION (SYNTHHID_INPUT_VERSION_MINOR | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) (SYNTHHID_INPUT_VERSION_MAJOR << 16))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #pragma pack(push, 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * Message types in the synthetic input protocol
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) enum synthhid_msg_type {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) SYNTH_HID_PROTOCOL_REQUEST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) SYNTH_HID_PROTOCOL_RESPONSE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) SYNTH_HID_INITIAL_DEVICE_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) SYNTH_HID_INITIAL_DEVICE_INFO_ACK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) SYNTH_HID_INPUT_REPORT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) SYNTH_HID_MAX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) * Basic message structures.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct synthhid_msg_hdr {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) enum synthhid_msg_type type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) u32 size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct synthhid_msg {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) struct synthhid_msg_hdr header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) char data[1]; /* Enclosed message */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) union synthhid_version {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) u16 minor_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) u16 major_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) u32 version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * Protocol messages
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) struct synthhid_protocol_request {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) struct synthhid_msg_hdr header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) union synthhid_version version_requested;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) struct synthhid_protocol_response {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) struct synthhid_msg_hdr header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) union synthhid_version version_requested;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) unsigned char approved;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) struct synthhid_device_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) struct synthhid_msg_hdr header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) struct hv_input_dev_info hid_dev_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) struct hid_descriptor hid_descriptor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) struct synthhid_device_info_ack {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) struct synthhid_msg_hdr header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) unsigned char reserved;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) struct synthhid_input_report {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct synthhid_msg_hdr header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) char buffer[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) #pragma pack(pop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #define INPUTVSC_SEND_RING_BUFFER_SIZE VMBUS_RING_SIZE(36 * 1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) #define INPUTVSC_RECV_RING_BUFFER_SIZE VMBUS_RING_SIZE(36 * 1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) enum pipe_prot_msg_type {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) PIPE_MESSAGE_INVALID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) PIPE_MESSAGE_DATA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) PIPE_MESSAGE_MAXIMUM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct pipe_prt_msg {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) enum pipe_prot_msg_type type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) u32 size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) char data[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) struct mousevsc_prt_msg {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) enum pipe_prot_msg_type type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) u32 size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) struct synthhid_protocol_request request;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) struct synthhid_protocol_response response;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) struct synthhid_device_info_ack ack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) * Represents an mousevsc device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) struct mousevsc_dev {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) struct hv_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) bool init_complete;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) bool connected;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) struct mousevsc_prt_msg protocol_req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) struct mousevsc_prt_msg protocol_resp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) /* Synchronize the request/response if needed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) struct completion wait_event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) int dev_info_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) struct hid_descriptor *hid_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) unsigned char *report_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) u32 report_desc_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) struct hv_input_dev_info hid_dev_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) struct hid_device *hid_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) u8 input_buf[HID_MAX_BUFFER_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) static struct mousevsc_dev *mousevsc_alloc_device(struct hv_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) struct mousevsc_dev *input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) input_dev = kzalloc(sizeof(struct mousevsc_dev), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) if (!input_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) input_dev->device = device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) hv_set_drvdata(device, input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) init_completion(&input_dev->wait_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) input_dev->init_complete = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) return input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) static void mousevsc_free_device(struct mousevsc_dev *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) kfree(device->hid_desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) kfree(device->report_desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) hv_set_drvdata(device->device, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) kfree(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) static void mousevsc_on_receive_device_info(struct mousevsc_dev *input_device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) struct synthhid_device_info *device_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) struct hid_descriptor *desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) struct mousevsc_prt_msg ack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) input_device->dev_info_status = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) input_device->hid_dev_info = device_info->hid_dev_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) desc = &device_info->hid_descriptor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) if (desc->bLength == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) /* The pointer is not NULL when we resume from hibernation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) kfree(input_device->hid_desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) input_device->hid_desc = kmemdup(desc, desc->bLength, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) if (!input_device->hid_desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) input_device->report_desc_size = desc->desc[0].wDescriptorLength;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) if (input_device->report_desc_size == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) input_device->dev_info_status = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) /* The pointer is not NULL when we resume from hibernation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) kfree(input_device->report_desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) input_device->report_desc = kzalloc(input_device->report_desc_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) if (!input_device->report_desc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) input_device->dev_info_status = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) memcpy(input_device->report_desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) ((unsigned char *)desc) + desc->bLength,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) desc->desc[0].wDescriptorLength);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) /* Send the ack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) memset(&ack, 0, sizeof(struct mousevsc_prt_msg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) ack.type = PIPE_MESSAGE_DATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) ack.size = sizeof(struct synthhid_device_info_ack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) ack.ack.header.type = SYNTH_HID_INITIAL_DEVICE_INFO_ACK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) ack.ack.header.size = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) ack.ack.reserved = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) ret = vmbus_sendpacket(input_device->device->channel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) &ack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) sizeof(struct pipe_prt_msg) - sizeof(unsigned char) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) sizeof(struct synthhid_device_info_ack),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) (unsigned long)&ack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) VM_PKT_DATA_INBAND,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) input_device->dev_info_status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) cleanup:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) complete(&input_device->wait_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) static void mousevsc_on_receive(struct hv_device *device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) struct vmpacket_descriptor *packet)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) struct pipe_prt_msg *pipe_msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) struct synthhid_msg *hid_msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) struct mousevsc_dev *input_dev = hv_get_drvdata(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) struct synthhid_input_report *input_report;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) size_t len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) pipe_msg = (struct pipe_prt_msg *)((unsigned long)packet +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) (packet->offset8 << 3));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) if (pipe_msg->type != PIPE_MESSAGE_DATA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) hid_msg = (struct synthhid_msg *)pipe_msg->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) switch (hid_msg->header.type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) case SYNTH_HID_PROTOCOL_RESPONSE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) * While it will be impossible for us to protect against
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) * malicious/buggy hypervisor/host, add a check here to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) * ensure we don't corrupt memory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) if ((pipe_msg->size + sizeof(struct pipe_prt_msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) - sizeof(unsigned char))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) > sizeof(struct mousevsc_prt_msg)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) WARN_ON(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) memcpy(&input_dev->protocol_resp, pipe_msg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) pipe_msg->size + sizeof(struct pipe_prt_msg) -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) sizeof(unsigned char));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) complete(&input_dev->wait_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) case SYNTH_HID_INITIAL_DEVICE_INFO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) WARN_ON(pipe_msg->size < sizeof(struct hv_input_dev_info));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) * Parse out the device info into device attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) * hid desc and report desc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) mousevsc_on_receive_device_info(input_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) (struct synthhid_device_info *)pipe_msg->data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) case SYNTH_HID_INPUT_REPORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) input_report =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) (struct synthhid_input_report *)pipe_msg->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) if (!input_dev->init_complete)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) len = min(input_report->header.size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) (u32)sizeof(input_dev->input_buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) memcpy(input_dev->input_buf, input_report->buffer, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) hid_input_report(input_dev->hid_device, HID_INPUT_REPORT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) input_dev->input_buf, len, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) pm_wakeup_hard_event(&input_dev->device->device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) pr_err("unsupported hid msg type - type %d len %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) hid_msg->header.type, hid_msg->header.size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) static void mousevsc_on_channel_callback(void *context)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) struct hv_device *device = context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) struct vmpacket_descriptor *desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) foreach_vmbus_pkt(desc, device->channel) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) switch (desc->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) case VM_PKT_COMP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) case VM_PKT_DATA_INBAND:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) mousevsc_on_receive(device, desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) pr_err("Unhandled packet type %d, tid %llx len %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) desc->type, desc->trans_id, desc->len8 * 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) static int mousevsc_connect_to_vsp(struct hv_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) unsigned long t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) struct mousevsc_dev *input_dev = hv_get_drvdata(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) struct mousevsc_prt_msg *request;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) struct mousevsc_prt_msg *response;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) reinit_completion(&input_dev->wait_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) request = &input_dev->protocol_req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) memset(request, 0, sizeof(struct mousevsc_prt_msg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) request->type = PIPE_MESSAGE_DATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) request->size = sizeof(struct synthhid_protocol_request);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) request->request.header.type = SYNTH_HID_PROTOCOL_REQUEST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) request->request.header.size = sizeof(unsigned int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) request->request.version_requested.version = SYNTHHID_INPUT_VERSION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) ret = vmbus_sendpacket(device->channel, request,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) sizeof(struct pipe_prt_msg) -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) sizeof(unsigned char) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) sizeof(struct synthhid_protocol_request),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) (unsigned long)request,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) VM_PKT_DATA_INBAND,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) t = wait_for_completion_timeout(&input_dev->wait_event, 5*HZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) if (!t) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) ret = -ETIMEDOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) response = &input_dev->protocol_resp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) if (!response->response.approved) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) pr_err("synthhid protocol request failed (version %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) SYNTHHID_INPUT_VERSION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) ret = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) t = wait_for_completion_timeout(&input_dev->wait_event, 5*HZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) if (!t) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) ret = -ETIMEDOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) * We should have gotten the device attr, hid desc and report
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) * desc at this point
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) ret = input_dev->dev_info_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) cleanup:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) static int mousevsc_hid_parse(struct hid_device *hid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) struct hv_device *dev = hid_get_drvdata(hid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) struct mousevsc_dev *input_dev = hv_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) return hid_parse_report(hid, input_dev->report_desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) input_dev->report_desc_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) static int mousevsc_hid_open(struct hid_device *hid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) static int mousevsc_hid_start(struct hid_device *hid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) static void mousevsc_hid_close(struct hid_device *hid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) static void mousevsc_hid_stop(struct hid_device *hid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) static int mousevsc_hid_raw_request(struct hid_device *hid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) unsigned char report_num,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) __u8 *buf, size_t len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) unsigned char rtype,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) int reqtype)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) static struct hid_ll_driver mousevsc_ll_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) .parse = mousevsc_hid_parse,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) .open = mousevsc_hid_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) .close = mousevsc_hid_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) .start = mousevsc_hid_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) .stop = mousevsc_hid_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) .raw_request = mousevsc_hid_raw_request,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) static struct hid_driver mousevsc_hid_driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) static int mousevsc_probe(struct hv_device *device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) const struct hv_vmbus_device_id *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) struct mousevsc_dev *input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) struct hid_device *hid_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) input_dev = mousevsc_alloc_device(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) if (!input_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) ret = vmbus_open(device->channel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) INPUTVSC_SEND_RING_BUFFER_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) INPUTVSC_RECV_RING_BUFFER_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) mousevsc_on_channel_callback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) goto probe_err0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) ret = mousevsc_connect_to_vsp(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) goto probe_err1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) /* workaround SA-167 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) if (input_dev->report_desc[14] == 0x25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) input_dev->report_desc[14] = 0x29;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) hid_dev = hid_allocate_device();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) if (IS_ERR(hid_dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) ret = PTR_ERR(hid_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) goto probe_err1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) hid_dev->ll_driver = &mousevsc_ll_driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) hid_dev->driver = &mousevsc_hid_driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) hid_dev->bus = BUS_VIRTUAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) hid_dev->vendor = input_dev->hid_dev_info.vendor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) hid_dev->product = input_dev->hid_dev_info.product;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) hid_dev->version = input_dev->hid_dev_info.version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) input_dev->hid_device = hid_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) sprintf(hid_dev->name, "%s", "Microsoft Vmbus HID-compliant Mouse");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) hid_set_drvdata(hid_dev, device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) ret = hid_add_device(hid_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) goto probe_err1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) ret = hid_parse(hid_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) hid_err(hid_dev, "parse failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) goto probe_err2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) ret = hid_hw_start(hid_dev, HID_CONNECT_HIDINPUT | HID_CONNECT_HIDDEV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) hid_err(hid_dev, "hw start failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) goto probe_err2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) device_init_wakeup(&device->device, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) input_dev->connected = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) input_dev->init_complete = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) probe_err2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) hid_destroy_device(hid_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) probe_err1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) vmbus_close(device->channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) probe_err0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) mousevsc_free_device(input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) static int mousevsc_remove(struct hv_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) struct mousevsc_dev *input_dev = hv_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) device_init_wakeup(&dev->device, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) vmbus_close(dev->channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) hid_hw_stop(input_dev->hid_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) hid_destroy_device(input_dev->hid_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) mousevsc_free_device(input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) static int mousevsc_suspend(struct hv_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) vmbus_close(dev->channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) static int mousevsc_resume(struct hv_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) ret = vmbus_open(dev->channel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) INPUTVSC_SEND_RING_BUFFER_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) INPUTVSC_RECV_RING_BUFFER_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) NULL, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) mousevsc_on_channel_callback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) ret = mousevsc_connect_to_vsp(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) static const struct hv_vmbus_device_id id_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) /* Mouse guid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) { HV_MOUSE_GUID, },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) { },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) MODULE_DEVICE_TABLE(vmbus, id_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) static struct hv_driver mousevsc_drv = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) .name = KBUILD_MODNAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) .id_table = id_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) .probe = mousevsc_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) .remove = mousevsc_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) .suspend = mousevsc_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) .resume = mousevsc_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) .probe_type = PROBE_PREFER_ASYNCHRONOUS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) static int __init mousevsc_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) return vmbus_driver_register(&mousevsc_drv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) static void __exit mousevsc_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) vmbus_driver_unregister(&mousevsc_drv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) MODULE_DESCRIPTION("Microsoft Hyper-V Synthetic HID Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) module_init(mousevsc_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) module_exit(mousevsc_exit);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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