| /* |
| * Copyright (c) 2009, Citrix Systems, Inc. |
| * Copyright (c) 2010, Microsoft Corporation. |
| * Copyright (c) 2011, Novell Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms and conditions of the GNU General Public License, |
| * version 2, as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| */ |
| #include <linux/init.h> |
| #include <linux/module.h> |
| #include <linux/delay.h> |
| #include <linux/device.h> |
| #include <linux/workqueue.h> |
| #include <linux/sched.h> |
| #include <linux/wait.h> |
| #include <linux/input.h> |
| #include <linux/hid.h> |
| #include <linux/hiddev.h> |
| |
| #include "hyperv.h" |
| |
| |
| /* |
| * Data types |
| */ |
| struct hv_input_dev_info { |
| unsigned short vendor; |
| unsigned short product; |
| unsigned short version; |
| char name[128]; |
| }; |
| |
| /* The maximum size of a synthetic input message. */ |
| #define SYNTHHID_MAX_INPUT_REPORT_SIZE 16 |
| |
| /* |
| * Current version |
| * |
| * History: |
| * Beta, RC < 2008/1/22 1,0 |
| * RC > 2008/1/22 2,0 |
| */ |
| #define SYNTHHID_INPUT_VERSION_MAJOR 2 |
| #define SYNTHHID_INPUT_VERSION_MINOR 0 |
| #define SYNTHHID_INPUT_VERSION (SYNTHHID_INPUT_VERSION_MINOR | \ |
| (SYNTHHID_INPUT_VERSION_MAJOR << 16)) |
| |
| |
| #pragma pack(push, 1) |
| /* |
| * Message types in the synthetic input protocol |
| */ |
| enum synthhid_msg_type { |
| SynthHidProtocolRequest, |
| SynthHidProtocolResponse, |
| SynthHidInitialDeviceInfo, |
| SynthHidInitialDeviceInfoAck, |
| SynthHidInputReport, |
| SynthHidMax |
| }; |
| |
| /* |
| * Basic message structures. |
| */ |
| struct synthhid_msg_hdr { |
| enum synthhid_msg_type type; |
| u32 size; |
| }; |
| |
| struct synthhid_msg { |
| struct synthhid_msg_hdr header; |
| char data[1]; /* Enclosed message */ |
| }; |
| |
| union synthhid_version { |
| struct { |
| u16 minor_version; |
| u16 major_version; |
| }; |
| u32 version; |
| }; |
| |
| /* |
| * Protocol messages |
| */ |
| struct synthhid_protocol_request { |
| struct synthhid_msg_hdr header; |
| union synthhid_version version_requested; |
| }; |
| |
| struct synthhid_protocol_response { |
| struct synthhid_msg_hdr header; |
| union synthhid_version version_requested; |
| unsigned char approved; |
| }; |
| |
| struct synthhid_device_info { |
| struct synthhid_msg_hdr header; |
| struct hv_input_dev_info hid_dev_info; |
| struct hid_descriptor hid_descriptor; |
| }; |
| |
| struct synthhid_device_info_ack { |
| struct synthhid_msg_hdr header; |
| unsigned char reserved; |
| }; |
| |
| struct synthhid_input_report { |
| struct synthhid_msg_hdr header; |
| char buffer[1]; |
| }; |
| |
| #pragma pack(pop) |
| |
| #define INPUTVSC_SEND_RING_BUFFER_SIZE (10*PAGE_SIZE) |
| #define INPUTVSC_RECV_RING_BUFFER_SIZE (10*PAGE_SIZE) |
| |
| #define NBITS(x) (((x)/BITS_PER_LONG)+1) |
| |
| enum pipe_prot_msg_type { |
| PipeMessageInvalid = 0, |
| PipeMessageData, |
| PipeMessageMaximum |
| }; |
| |
| |
| struct pipe_prt_msg { |
| enum pipe_prot_msg_type type; |
| u32 size; |
| char data[1]; |
| }; |
| |
| /* |
| * Data types |
| */ |
| struct mousevsc_prt_msg { |
| enum pipe_prot_msg_type type; |
| u32 size; |
| union { |
| struct synthhid_protocol_request request; |
| struct synthhid_protocol_response response; |
| struct synthhid_device_info_ack ack; |
| }; |
| }; |
| |
| /* |
| * Represents an mousevsc device |
| */ |
| struct mousevsc_dev { |
| struct hv_device *device; |
| /* 0 indicates the device is being destroyed */ |
| atomic_t ref_count; |
| int num_outstanding_req; |
| unsigned char init_complete; |
| struct mousevsc_prt_msg protocol_req; |
| struct mousevsc_prt_msg protocol_resp; |
| /* Synchronize the request/response if needed */ |
| wait_queue_head_t protocol_wait_event; |
| wait_queue_head_t dev_info_wait_event; |
| int protocol_wait_condition; |
| int device_wait_condition; |
| int dev_info_status; |
| |
| struct hid_descriptor *hid_desc; |
| unsigned char *report_desc; |
| u32 report_desc_size; |
| struct hv_input_dev_info hid_dev_info; |
| }; |
| |
| struct input_device_context { |
| struct hv_device *device_ctx; |
| struct hid_device *hid_device; |
| struct hv_input_dev_info device_info; |
| int connected; |
| }; |
| |
| static struct mousevsc_dev *alloc_input_device(struct hv_device *device) |
| { |
| struct mousevsc_dev *input_dev; |
| |
| input_dev = kzalloc(sizeof(struct mousevsc_dev), GFP_KERNEL); |
| |
| if (!input_dev) |
| return NULL; |
| |
| /* |
| * Set to 2 to allow both inbound and outbound traffics |
| * (ie get_input_device() and must_get_input_device()) to proceed. |
| */ |
| atomic_cmpxchg(&input_dev->ref_count, 0, 2); |
| |
| input_dev->device = device; |
| device->ext = input_dev; |
| |
| return input_dev; |
| } |
| |
| static void free_input_device(struct mousevsc_dev *device) |
| { |
| WARN_ON(atomic_read(&device->ref_count) == 0); |
| kfree(device); |
| } |
| |
| /* |
| * Get the inputdevice object if exists and its refcount > 1 |
| */ |
| static struct mousevsc_dev *get_input_device(struct hv_device *device) |
| { |
| struct mousevsc_dev *input_dev; |
| |
| input_dev = (struct mousevsc_dev *)device->ext; |
| |
| /* |
| * FIXME |
| * This sure isn't a valid thing to print for debugging, no matter |
| * what the intention is... |
| * |
| * printk(KERN_ERR "-------------------------> REFCOUNT = %d", |
| * input_dev->ref_count); |
| */ |
| |
| if (input_dev && atomic_read(&input_dev->ref_count) > 1) |
| atomic_inc(&input_dev->ref_count); |
| else |
| input_dev = NULL; |
| |
| return input_dev; |
| } |
| |
| /* |
| * Get the inputdevice object iff exists and its refcount > 0 |
| */ |
| static struct mousevsc_dev *must_get_input_device(struct hv_device *device) |
| { |
| struct mousevsc_dev *input_dev; |
| |
| input_dev = (struct mousevsc_dev *)device->ext; |
| |
| if (input_dev && atomic_read(&input_dev->ref_count)) |
| atomic_inc(&input_dev->ref_count); |
| else |
| input_dev = NULL; |
| |
| return input_dev; |
| } |
| |
| static void put_input_device(struct hv_device *device) |
| { |
| struct mousevsc_dev *input_dev; |
| |
| input_dev = (struct mousevsc_dev *)device->ext; |
| |
| atomic_dec(&input_dev->ref_count); |
| } |
| |
| /* |
| * Drop ref count to 1 to effectively disable get_input_device() |
| */ |
| static struct mousevsc_dev *release_input_device(struct hv_device *device) |
| { |
| struct mousevsc_dev *input_dev; |
| |
| input_dev = (struct mousevsc_dev *)device->ext; |
| |
| /* Busy wait until the ref drop to 2, then set it to 1 */ |
| while (atomic_cmpxchg(&input_dev->ref_count, 2, 1) != 2) |
| udelay(100); |
| |
| return input_dev; |
| } |
| |
| /* |
| * Drop ref count to 0. No one can use input_device object. |
| */ |
| static struct mousevsc_dev *final_release_input_device(struct hv_device *device) |
| { |
| struct mousevsc_dev *input_dev; |
| |
| input_dev = (struct mousevsc_dev *)device->ext; |
| |
| /* Busy wait until the ref drop to 1, then set it to 0 */ |
| while (atomic_cmpxchg(&input_dev->ref_count, 1, 0) != 1) |
| udelay(100); |
| |
| device->ext = NULL; |
| return input_dev; |
| } |
| |
| static void mousevsc_on_send_completion(struct hv_device *device, |
| struct vmpacket_descriptor *packet) |
| { |
| struct mousevsc_dev *input_dev; |
| void *request; |
| |
| input_dev = must_get_input_device(device); |
| if (!input_dev) { |
| pr_err("unable to get input device...device being destroyed?"); |
| return; |
| } |
| |
| request = (void *)(unsigned long)packet->trans_id; |
| |
| if (request == &input_dev->protocol_req) { |
| /* FIXME */ |
| /* Shouldn't we be doing something here? */ |
| } |
| |
| put_input_device(device); |
| } |
| |
| static void mousevsc_on_receive_device_info(struct mousevsc_dev *input_device, |
| struct synthhid_device_info *device_info) |
| { |
| int ret = 0; |
| struct hid_descriptor *desc; |
| struct mousevsc_prt_msg ack; |
| |
| /* Assume success for now */ |
| input_device->dev_info_status = 0; |
| |
| /* Save the device attr */ |
| memcpy(&input_device->hid_dev_info, &device_info->hid_dev_info, |
| sizeof(struct hv_input_dev_info)); |
| |
| /* Save the hid desc */ |
| desc = &device_info->hid_descriptor; |
| WARN_ON(desc->bLength > 0); |
| |
| input_device->hid_desc = kzalloc(desc->bLength, GFP_KERNEL); |
| |
| if (!input_device->hid_desc) { |
| pr_err("unable to allocate hid descriptor - size %d", |
| desc->bLength); |
| goto cleanup; |
| } |
| |
| memcpy(input_device->hid_desc, desc, desc->bLength); |
| |
| /* Save the report desc */ |
| input_device->report_desc_size = desc->desc[0].wDescriptorLength; |
| input_device->report_desc = kzalloc(input_device->report_desc_size, |
| GFP_KERNEL); |
| |
| if (!input_device->report_desc) { |
| pr_err("unable to allocate report descriptor - size %d", |
| input_device->report_desc_size); |
| goto cleanup; |
| } |
| |
| memcpy(input_device->report_desc, |
| ((unsigned char *)desc) + desc->bLength, |
| desc->desc[0].wDescriptorLength); |
| |
| /* Send the ack */ |
| memset(&ack, 0, sizeof(struct mousevsc_prt_msg)); |
| |
| ack.type = PipeMessageData; |
| ack.size = sizeof(struct synthhid_device_info_ack); |
| |
| ack.ack.header.type = SynthHidInitialDeviceInfoAck; |
| ack.ack.header.size = 1; |
| ack.ack.reserved = 0; |
| |
| ret = vmbus_sendpacket(input_device->device->channel, |
| &ack, |
| sizeof(struct pipe_prt_msg) - sizeof(unsigned char) + |
| sizeof(struct synthhid_device_info_ack), |
| (unsigned long)&ack, |
| VM_PKT_DATA_INBAND, |
| VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
| if (ret != 0) { |
| pr_err("unable to send synthhid device info ack - ret %d", |
| ret); |
| goto cleanup; |
| } |
| |
| input_device->device_wait_condition = 1; |
| wake_up(&input_device->dev_info_wait_event); |
| |
| return; |
| |
| cleanup: |
| kfree(input_device->hid_desc); |
| input_device->hid_desc = NULL; |
| |
| kfree(input_device->report_desc); |
| input_device->report_desc = NULL; |
| |
| input_device->dev_info_status = -1; |
| input_device->device_wait_condition = 1; |
| wake_up(&input_device->dev_info_wait_event); |
| } |
| |
| static void mousevsc_on_receive_input_report(struct mousevsc_dev *input_device, |
| struct synthhid_input_report *input_report) |
| { |
| struct hv_driver *input_drv; |
| struct input_device_context *input_dev_ctx; |
| |
| if (!input_device->init_complete) { |
| pr_info("Initialization incomplete...ignoring input_report msg"); |
| return; |
| } |
| |
| input_drv = drv_to_hv_drv(input_device->device->device.driver); |
| |
| input_dev_ctx = dev_get_drvdata(&input_device->device->device); |
| |
| hid_input_report(input_dev_ctx->hid_device, |
| HID_INPUT_REPORT, input_report->buffer, input_report->header.size, 1); |
| |
| } |
| |
| static void mousevsc_on_receive(struct hv_device *device, |
| struct vmpacket_descriptor *packet) |
| { |
| struct pipe_prt_msg *pipe_msg; |
| struct synthhid_msg *hid_msg; |
| struct mousevsc_dev *input_dev; |
| |
| input_dev = must_get_input_device(device); |
| if (!input_dev) { |
| pr_err("unable to get input device...device being destroyed?"); |
| return; |
| } |
| |
| pipe_msg = (struct pipe_prt_msg *)((unsigned long)packet + |
| (packet->offset8 << 3)); |
| |
| if (pipe_msg->type != PipeMessageData) { |
| pr_err("unknown pipe msg type - type %d len %d", |
| pipe_msg->type, pipe_msg->size); |
| put_input_device(device); |
| return ; |
| } |
| |
| hid_msg = (struct synthhid_msg *)&pipe_msg->data[0]; |
| |
| switch (hid_msg->header.type) { |
| case SynthHidProtocolResponse: |
| memcpy(&input_dev->protocol_resp, pipe_msg, |
| pipe_msg->size + sizeof(struct pipe_prt_msg) - |
| sizeof(unsigned char)); |
| input_dev->protocol_wait_condition = 1; |
| wake_up(&input_dev->protocol_wait_event); |
| break; |
| |
| case SynthHidInitialDeviceInfo: |
| WARN_ON(pipe_msg->size >= sizeof(struct hv_input_dev_info)); |
| |
| /* |
| * Parse out the device info into device attr, |
| * hid desc and report desc |
| */ |
| mousevsc_on_receive_device_info(input_dev, |
| (struct synthhid_device_info *)&pipe_msg->data[0]); |
| break; |
| case SynthHidInputReport: |
| mousevsc_on_receive_input_report(input_dev, |
| (struct synthhid_input_report *)&pipe_msg->data[0]); |
| |
| break; |
| default: |
| pr_err("unsupported hid msg type - type %d len %d", |
| hid_msg->header.type, hid_msg->header.size); |
| break; |
| } |
| |
| put_input_device(device); |
| } |
| |
| static void mousevsc_on_channel_callback(void *context) |
| { |
| const int packetSize = 0x100; |
| int ret = 0; |
| struct hv_device *device = (struct hv_device *)context; |
| struct mousevsc_dev *input_dev; |
| |
| u32 bytes_recvd; |
| u64 req_id; |
| unsigned char packet[0x100]; |
| struct vmpacket_descriptor *desc; |
| unsigned char *buffer = packet; |
| int bufferlen = packetSize; |
| |
| input_dev = must_get_input_device(device); |
| |
| if (!input_dev) { |
| pr_err("unable to get input device...device being destroyed?"); |
| return; |
| } |
| |
| do { |
| ret = vmbus_recvpacket_raw(device->channel, buffer, |
| bufferlen, &bytes_recvd, &req_id); |
| |
| if (ret == 0) { |
| if (bytes_recvd > 0) { |
| desc = (struct vmpacket_descriptor *)buffer; |
| |
| switch (desc->type) { |
| case VM_PKT_COMP: |
| mousevsc_on_send_completion( |
| device, desc); |
| break; |
| |
| case VM_PKT_DATA_INBAND: |
| mousevsc_on_receive( |
| device, desc); |
| break; |
| |
| default: |
| pr_err("unhandled packet type %d, tid %llx len %d\n", |
| desc->type, |
| req_id, |
| bytes_recvd); |
| break; |
| } |
| |
| /* reset */ |
| if (bufferlen > packetSize) { |
| kfree(buffer); |
| |
| buffer = packet; |
| bufferlen = packetSize; |
| } |
| } else { |
| /* |
| * pr_debug("nothing else to read..."); |
| * reset |
| */ |
| if (bufferlen > packetSize) { |
| kfree(buffer); |
| |
| buffer = packet; |
| bufferlen = packetSize; |
| } |
| break; |
| } |
| } else if (ret == -ENOBUFS) { |
| /* Handle large packet */ |
| bufferlen = bytes_recvd; |
| buffer = kzalloc(bytes_recvd, GFP_KERNEL); |
| |
| if (buffer == NULL) { |
| buffer = packet; |
| bufferlen = packetSize; |
| |
| /* Try again next time around */ |
| pr_err("unable to allocate buffer of size %d!", |
| bytes_recvd); |
| break; |
| } |
| } |
| } while (1); |
| |
| put_input_device(device); |
| |
| return; |
| } |
| |
| static int mousevsc_connect_to_vsp(struct hv_device *device) |
| { |
| int ret = 0; |
| struct mousevsc_dev *input_dev; |
| struct mousevsc_prt_msg *request; |
| struct mousevsc_prt_msg *response; |
| |
| input_dev = get_input_device(device); |
| |
| if (!input_dev) { |
| pr_err("unable to get input device...device being destroyed?"); |
| return -1; |
| } |
| |
| init_waitqueue_head(&input_dev->protocol_wait_event); |
| init_waitqueue_head(&input_dev->dev_info_wait_event); |
| |
| request = &input_dev->protocol_req; |
| |
| /* |
| * Now, initiate the vsc/vsp initialization protocol on the open channel |
| */ |
| memset(request, 0, sizeof(struct mousevsc_prt_msg)); |
| |
| request->type = PipeMessageData; |
| request->size = sizeof(struct synthhid_protocol_request); |
| |
| request->request.header.type = SynthHidProtocolRequest; |
| request->request.header.size = sizeof(unsigned long); |
| request->request.version_requested.version = SYNTHHID_INPUT_VERSION; |
| |
| pr_info("synthhid protocol request..."); |
| |
| ret = vmbus_sendpacket(device->channel, request, |
| sizeof(struct pipe_prt_msg) - |
| sizeof(unsigned char) + |
| sizeof(struct synthhid_protocol_request), |
| (unsigned long)request, |
| VM_PKT_DATA_INBAND, |
| VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
| if (ret != 0) { |
| pr_err("unable to send synthhid protocol request."); |
| goto cleanup; |
| } |
| |
| input_dev->protocol_wait_condition = 0; |
| wait_event_timeout(input_dev->protocol_wait_event, |
| input_dev->protocol_wait_condition, msecs_to_jiffies(1000)); |
| if (input_dev->protocol_wait_condition == 0) { |
| ret = -ETIMEDOUT; |
| goto cleanup; |
| } |
| |
| response = &input_dev->protocol_resp; |
| |
| if (!response->response.approved) { |
| pr_err("synthhid protocol request failed (version %d)", |
| SYNTHHID_INPUT_VERSION); |
| ret = -1; |
| goto cleanup; |
| } |
| |
| input_dev->device_wait_condition = 0; |
| wait_event_timeout(input_dev->dev_info_wait_event, |
| input_dev->device_wait_condition, msecs_to_jiffies(1000)); |
| if (input_dev->device_wait_condition == 0) { |
| ret = -ETIMEDOUT; |
| goto cleanup; |
| } |
| |
| /* |
| * We should have gotten the device attr, hid desc and report |
| * desc at this point |
| */ |
| if (!input_dev->dev_info_status) |
| pr_info("**** input channel up and running!! ****"); |
| else |
| ret = -1; |
| |
| cleanup: |
| put_input_device(device); |
| |
| return ret; |
| } |
| |
| static int mousevsc_hid_open(struct hid_device *hid) |
| { |
| return 0; |
| } |
| |
| static void mousevsc_hid_close(struct hid_device *hid) |
| { |
| } |
| |
| static void reportdesc_callback(struct hv_device *dev, void *packet, u32 len) |
| { |
| struct input_device_context *input_device_ctx = |
| dev_get_drvdata(&dev->device); |
| struct hid_device *hid_dev; |
| |
| /* hid_debug = -1; */ |
| hid_dev = kmalloc(sizeof(struct hid_device), GFP_KERNEL); |
| |
| if (hid_parse_report(hid_dev, packet, len)) { |
| DPRINT_INFO(INPUTVSC_DRV, "Unable to call hd_parse_report"); |
| return; |
| } |
| |
| if (hid_dev) { |
| DPRINT_INFO(INPUTVSC_DRV, "hid_device created"); |
| |
| hid_dev->ll_driver->open = mousevsc_hid_open; |
| hid_dev->ll_driver->close = mousevsc_hid_close; |
| |
| hid_dev->bus = BUS_VIRTUAL; |
| hid_dev->vendor = input_device_ctx->device_info.vendor; |
| hid_dev->product = input_device_ctx->device_info.product; |
| hid_dev->version = input_device_ctx->device_info.version; |
| hid_dev->dev = dev->device; |
| |
| sprintf(hid_dev->name, "%s", |
| input_device_ctx->device_info.name); |
| |
| /* |
| * HJ Do we want to call it with a 0 |
| */ |
| if (!hidinput_connect(hid_dev, 0)) { |
| hid_dev->claimed |= HID_CLAIMED_INPUT; |
| |
| input_device_ctx->connected = 1; |
| |
| DPRINT_INFO(INPUTVSC_DRV, |
| "HID device claimed by input\n"); |
| } |
| |
| if (!hid_dev->claimed) { |
| DPRINT_ERR(INPUTVSC_DRV, |
| "HID device not claimed by " |
| "input or hiddev\n"); |
| } |
| |
| input_device_ctx->hid_device = hid_dev; |
| } |
| |
| kfree(hid_dev); |
| } |
| |
| static int mousevsc_on_device_add(struct hv_device *device, |
| void *additional_info) |
| { |
| int ret = 0; |
| struct mousevsc_dev *input_dev; |
| struct hv_driver *input_drv; |
| struct hv_input_dev_info dev_info; |
| struct input_device_context *input_device_ctx; |
| |
| input_dev = alloc_input_device(device); |
| |
| if (!input_dev) { |
| ret = -1; |
| goto cleanup; |
| } |
| |
| input_dev->init_complete = false; |
| |
| /* Open the channel */ |
| ret = vmbus_open(device->channel, |
| INPUTVSC_SEND_RING_BUFFER_SIZE, |
| INPUTVSC_RECV_RING_BUFFER_SIZE, |
| NULL, |
| 0, |
| mousevsc_on_channel_callback, |
| device |
| ); |
| |
| if (ret != 0) { |
| pr_err("unable to open channel: %d", ret); |
| free_input_device(input_dev); |
| return -1; |
| } |
| |
| pr_info("InputVsc channel open: %d", ret); |
| |
| ret = mousevsc_connect_to_vsp(device); |
| |
| if (ret != 0) { |
| pr_err("unable to connect channel: %d", ret); |
| |
| vmbus_close(device->channel); |
| free_input_device(input_dev); |
| return ret; |
| } |
| |
| input_drv = drv_to_hv_drv(input_dev->device->device.driver); |
| |
| dev_info.vendor = input_dev->hid_dev_info.vendor; |
| dev_info.product = input_dev->hid_dev_info.product; |
| dev_info.version = input_dev->hid_dev_info.version; |
| strcpy(dev_info.name, "Microsoft Vmbus HID-compliant Mouse"); |
| |
| /* Send the device info back up */ |
| input_device_ctx = dev_get_drvdata(&device->device); |
| memcpy(&input_device_ctx->device_info, &dev_info, |
| sizeof(struct hv_input_dev_info)); |
| |
| /* Send the report desc back up */ |
| /* workaround SA-167 */ |
| if (input_dev->report_desc[14] == 0x25) |
| input_dev->report_desc[14] = 0x29; |
| |
| reportdesc_callback(device, input_dev->report_desc, |
| input_dev->report_desc_size); |
| |
| input_dev->init_complete = true; |
| |
| cleanup: |
| return ret; |
| } |
| |
| static int mousevsc_on_device_remove(struct hv_device *device) |
| { |
| struct mousevsc_dev *input_dev; |
| int ret = 0; |
| |
| pr_info("disabling input device (%p)...", |
| device->ext); |
| |
| input_dev = release_input_device(device); |
| |
| |
| /* |
| * At this point, all outbound traffic should be disable. We only |
| * allow inbound traffic (responses) to proceed |
| * |
| * so that outstanding requests can be completed. |
| */ |
| while (input_dev->num_outstanding_req) { |
| pr_info("waiting for %d requests to complete...", |
| input_dev->num_outstanding_req); |
| |
| udelay(100); |
| } |
| |
| pr_info("removing input device (%p)...", device->ext); |
| |
| input_dev = final_release_input_device(device); |
| |
| pr_info("input device (%p) safe to remove", input_dev); |
| |
| /* Close the channel */ |
| vmbus_close(device->channel); |
| |
| free_input_device(input_dev); |
| |
| return ret; |
| } |
| |
| |
| static int mousevsc_probe(struct hv_device *dev) |
| { |
| int ret = 0; |
| |
| struct input_device_context *input_dev_ctx; |
| |
| input_dev_ctx = kmalloc(sizeof(struct input_device_context), |
| GFP_KERNEL); |
| |
| dev_set_drvdata(&dev->device, input_dev_ctx); |
| |
| /* Call to the vsc driver to add the device */ |
| ret = mousevsc_on_device_add(dev, NULL); |
| |
| if (ret != 0) { |
| DPRINT_ERR(INPUTVSC_DRV, "unable to add input vsc device"); |
| |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| static int mousevsc_remove(struct hv_device *dev) |
| { |
| struct input_device_context *input_dev_ctx; |
| int ret; |
| |
| input_dev_ctx = dev_get_drvdata(&dev->device); |
| if (input_dev_ctx->connected) { |
| hidinput_disconnect(input_dev_ctx->hid_device); |
| input_dev_ctx->connected = 0; |
| } |
| |
| /* |
| * Call to the vsc driver to let it know that the device |
| * is being removed |
| */ |
| ret = mousevsc_on_device_remove(dev); |
| if (ret != 0) { |
| DPRINT_ERR(INPUTVSC_DRV, |
| "unable to remove vsc device (ret %d)", ret); |
| } |
| |
| kfree(input_dev_ctx); |
| |
| return ret; |
| } |
| |
| static const struct hv_vmbus_device_id id_table[] = { |
| /* Mouse guid */ |
| { VMBUS_DEVICE(0x9E, 0xB6, 0xA8, 0xCF, 0x4A, 0x5B, 0xc0, 0x4c, |
| 0xB9, 0x8B, 0x8B, 0xA1, 0xA1, 0xF3, 0xF9, 0x5A) }, |
| { }, |
| }; |
| |
| /* |
| * The mouse driver is not functional; do not auto-load it. |
| */ |
| /* MODULE_DEVICE_TABLE(vmbus, id_table); */ |
| |
| static struct hv_driver mousevsc_drv = { |
| .name = "mousevsc", |
| .id_table = id_table, |
| .probe = mousevsc_probe, |
| .remove = mousevsc_remove, |
| }; |
| |
| static int __init mousevsc_init(void) |
| { |
| return vmbus_driver_register(&mousevsc_drv); |
| } |
| |
| static void __exit mousevsc_exit(void) |
| { |
| vmbus_driver_unregister(&mousevsc_drv); |
| } |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(HV_DRV_VERSION); |
| module_init(mousevsc_init); |
| module_exit(mousevsc_exit); |
| |