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Open Source and information security mailing list archives
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Date: Fri, 14 Oct 2011 23:08:27 -0700
From: "K. Y. Srinivasan" <kys@...rosoft.com>
To: gregkh@...e.de, linux-kernel@...r.kernel.org,
devel@...uxdriverproject.org, virtualization@...ts.osdl.org,
dmitry.torokhov@...il.com, linux-input@...r.kernel.org
Cc: "K. Y. Srinivasan" <kys@...rosoft.com>,
Haiyang Zhang <haiyangz@...rosoft.com>
Subject: [PATCH 1/1] Staging: hv: mousevsc: Move the mouse driver out of staging
In preparation for moving the mouse driver out of staging, seek community
review of the mouse driver code.
Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@...rosoft.com>
---
drivers/hid/Kconfig | 6 +
drivers/hid/Makefile | 1 +
drivers/hid/hv_mouse.c | 599 +++++++++++++++++++++++++++++++++++++++++
drivers/staging/hv/Kconfig | 6 -
drivers/staging/hv/Makefile | 1 -
drivers/staging/hv/hv_mouse.c | 599 -----------------------------------------
6 files changed, 606 insertions(+), 606 deletions(-)
create mode 100644 drivers/hid/hv_mouse.c
delete mode 100644 drivers/staging/hv/hv_mouse.c
diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 1130a89..f8b98b8 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -613,6 +613,12 @@ config HID_ZYDACRON
---help---
Support for Zydacron remote control.
+config HYPERV_MOUSE
+ tristate "Microsoft Hyper-V mouse driver"
+ depends on HYPERV
+ help
+ Select this option to enable the Hyper-V mouse driver.
+
endmenu
endif # HID_SUPPORT
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index 0a0a38e..436ac2e 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -76,6 +76,7 @@ obj-$(CONFIG_HID_ZYDACRON) += hid-zydacron.o
obj-$(CONFIG_HID_WACOM) += hid-wacom.o
obj-$(CONFIG_HID_WALTOP) += hid-waltop.o
obj-$(CONFIG_HID_WIIMOTE) += hid-wiimote.o
+obj-$(CONFIG_HYPERV_MOUSE) += hv_mouse.o
obj-$(CONFIG_USB_HID) += usbhid/
obj-$(CONFIG_USB_MOUSE) += usbhid/
diff --git a/drivers/hid/hv_mouse.c b/drivers/hid/hv_mouse.c
new file mode 100644
index 0000000..ccd39c7
--- /dev/null
+++ b/drivers/hid/hv_mouse.c
@@ -0,0 +1,599 @@
+/*
+ * 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 <linux/hyperv.h>
+
+
+struct hv_input_dev_info {
+ unsigned int size;
+ unsigned short vendor;
+ unsigned short product;
+ unsigned short version;
+ unsigned short reserved[11];
+};
+
+/* 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 {
+ SYNTH_HID_PROTOCOL_REQUEST,
+ SYNTH_HID_PROTOCOL_RESPONSE,
+ SYNTH_HID_INITIAL_DEVICE_INFO,
+ SYNTH_HID_INITIAL_DEVICE_INFO_ACK,
+ SYNTH_HID_INPUT_REPORT,
+ SYNTH_HID_MAX
+};
+
+/*
+ * 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 {
+ PIPE_MESSAGE_INVALID,
+ PIPE_MESSAGE_DATA,
+ PIPE_MESSAGE_MAXIMUM
+};
+
+
+struct pipe_prt_msg {
+ enum pipe_prot_msg_type type;
+ u32 size;
+ char data[1];
+};
+
+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;
+ unsigned char init_complete;
+ struct mousevsc_prt_msg protocol_req;
+ struct mousevsc_prt_msg protocol_resp;
+ /* Synchronize the request/response if needed */
+ struct completion wait_event;
+ 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;
+ int connected;
+ struct hid_device *hid_device;
+};
+
+
+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;
+
+ input_dev->device = device;
+ hv_set_drvdata(device, input_dev);
+ init_completion(&input_dev->wait_event);
+
+ return input_dev;
+}
+
+static void free_input_device(struct mousevsc_dev *device)
+{
+ kfree(device->hid_desc);
+ kfree(device->report_desc);
+ hv_set_drvdata(device->device, NULL);
+ kfree(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;
+
+ memcpy(&input_device->hid_dev_info, &device_info->hid_dev_info,
+ sizeof(struct hv_input_dev_info));
+
+ desc = &device_info->hid_descriptor;
+ WARN_ON(desc->bLength == 0);
+
+ input_device->hid_desc = kzalloc(desc->bLength, GFP_ATOMIC);
+
+ if (!input_device->hid_desc)
+ goto cleanup;
+
+ memcpy(input_device->hid_desc, desc, desc->bLength);
+
+ input_device->report_desc_size = desc->desc[0].wDescriptorLength;
+ if (input_device->report_desc_size == 0)
+ goto cleanup;
+ input_device->report_desc = kzalloc(input_device->report_desc_size,
+ GFP_ATOMIC);
+
+ if (!input_device->report_desc)
+ 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 = PIPE_MESSAGE_DATA;
+ ack.size = sizeof(struct synthhid_device_info_ack);
+
+ ack.ack.header.type = SYNTH_HID_INITIAL_DEVICE_INFO_ACK;
+ 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)
+ goto cleanup;
+
+ complete(&input_device->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;
+ complete(&input_device->wait_event);
+}
+
+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 = hv_get_drvdata(device);
+ struct synthhid_input_report *input_report;
+
+ pipe_msg = (struct pipe_prt_msg *)((unsigned long)packet +
+ (packet->offset8 << 3));
+
+ if (pipe_msg->type != PIPE_MESSAGE_DATA)
+ return;
+
+ hid_msg = (struct synthhid_msg *)&pipe_msg->data[0];
+
+ switch (hid_msg->header.type) {
+ case SYNTH_HID_PROTOCOL_RESPONSE:
+ memcpy(&input_dev->protocol_resp, pipe_msg,
+ pipe_msg->size + sizeof(struct pipe_prt_msg) -
+ sizeof(unsigned char));
+ complete(&input_dev->wait_event);
+ break;
+
+ case SYNTH_HID_INITIAL_DEVICE_INFO:
+ 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 SYNTH_HID_INPUT_REPORT:
+ input_report =
+ (struct synthhid_input_report *)&pipe_msg->data[0];
+ if (!input_dev->init_complete)
+ break;
+ hid_input_report(input_dev->hid_device,
+ HID_INPUT_REPORT, input_report->buffer,
+ input_report->header.size, 1);
+ break;
+ default:
+ pr_err("unsupported hid msg type - type %d len %d",
+ hid_msg->header.type, hid_msg->header.size);
+ break;
+ }
+
+}
+
+static void mousevsc_on_channel_callback(void *context)
+{
+ const int packetSize = 0x100;
+ int ret = 0;
+ struct hv_device *device = (struct hv_device *)context;
+
+ u32 bytes_recvd;
+ u64 req_id;
+ unsigned char packet[0x100];
+ struct vmpacket_descriptor *desc;
+ unsigned char *buffer = packet;
+ int bufferlen = packetSize;
+
+
+ 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:
+ 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 {
+ 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_ATOMIC);
+
+ if (buffer == NULL) {
+ buffer = packet;
+ bufferlen = packetSize;
+ break;
+ }
+ }
+ } while (1);
+
+ return;
+}
+
+static int mousevsc_connect_to_vsp(struct hv_device *device)
+{
+ int ret = 0;
+ int t;
+ struct mousevsc_dev *input_dev = hv_get_drvdata(device);
+ struct mousevsc_prt_msg *request;
+ struct mousevsc_prt_msg *response;
+
+
+ request = &input_dev->protocol_req;
+
+ memset(request, 0, sizeof(struct mousevsc_prt_msg));
+
+ request->type = PIPE_MESSAGE_DATA;
+ request->size = sizeof(struct synthhid_protocol_request);
+
+ request->request.header.type = SYNTH_HID_PROTOCOL_REQUEST;
+ request->request.header.size = sizeof(unsigned int);
+ request->request.version_requested.version = SYNTHHID_INPUT_VERSION;
+
+
+ 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)
+ goto cleanup;
+
+ t = wait_for_completion_timeout(&input_dev->wait_event, 5*HZ);
+ if (t == 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 = -ENODEV;
+ goto cleanup;
+ }
+
+ t = wait_for_completion_timeout(&input_dev->wait_event, 5*HZ);
+ if (t == 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)
+ ret = -ENOMEM;
+
+cleanup:
+
+ return ret;
+}
+
+static int mousevsc_hid_open(struct hid_device *hid)
+{
+ return 0;
+}
+
+static void mousevsc_hid_close(struct hid_device *hid)
+{
+}
+
+static struct hid_ll_driver mousevsc_ll_driver = {
+ .open = mousevsc_hid_open,
+ .close = mousevsc_hid_close,
+};
+
+static struct hid_driver mousevsc_hid_driver;
+
+static void reportdesc_callback(struct hv_device *dev, void *packet, u32 len)
+{
+ struct hid_device *hid_dev;
+ struct mousevsc_dev *input_device = hv_get_drvdata(dev);
+
+ hid_dev = hid_allocate_device();
+ if (IS_ERR(hid_dev))
+ return;
+
+ hid_dev->ll_driver = &mousevsc_ll_driver;
+ hid_dev->driver = &mousevsc_hid_driver;
+
+ if (hid_parse_report(hid_dev, packet, len))
+ return;
+
+ hid_dev->bus = BUS_VIRTUAL;
+ hid_dev->vendor = input_device->hid_dev_info.vendor;
+ hid_dev->product = input_device->hid_dev_info.product;
+ hid_dev->version = input_device->hid_dev_info.version;
+
+ sprintf(hid_dev->name, "%s", "Microsoft Vmbus HID-compliant Mouse");
+
+ if (!hidinput_connect(hid_dev, 0)) {
+ hid_dev->claimed |= HID_CLAIMED_INPUT;
+
+ input_device->connected = 1;
+
+ }
+
+ input_device->hid_device = hid_dev;
+}
+
+static int mousevsc_on_device_add(struct hv_device *device)
+{
+ int ret = 0;
+ struct mousevsc_dev *input_dev;
+
+ input_dev = alloc_input_device(device);
+
+ if (!input_dev)
+ return -ENOMEM;
+
+ input_dev->init_complete = false;
+
+ 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) {
+ free_input_device(input_dev);
+ return ret;
+ }
+
+
+ ret = mousevsc_connect_to_vsp(device);
+
+ if (ret != 0) {
+ vmbus_close(device->channel);
+ free_input_device(input_dev);
+ return ret;
+ }
+
+
+ /* 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;
+
+ return ret;
+}
+
+static int mousevsc_probe(struct hv_device *dev,
+ const struct hv_vmbus_device_id *dev_id)
+{
+
+ return mousevsc_on_device_add(dev);
+
+}
+
+static int mousevsc_remove(struct hv_device *dev)
+{
+ struct mousevsc_dev *input_dev = hv_get_drvdata(dev);
+
+ vmbus_close(dev->channel);
+
+ if (input_dev->connected) {
+ hidinput_disconnect(input_dev->hid_device);
+ input_dev->connected = 0;
+ hid_destroy_device(input_dev->hid_device);
+ }
+
+ free_input_device(input_dev);
+
+ return 0;
+}
+
+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) },
+ { },
+};
+
+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);
diff --git a/drivers/staging/hv/Kconfig b/drivers/staging/hv/Kconfig
index 072185e..6c0dc30 100644
--- a/drivers/staging/hv/Kconfig
+++ b/drivers/staging/hv/Kconfig
@@ -9,9 +9,3 @@ config HYPERV_NET
depends on HYPERV && NET
help
Select this option to enable the Hyper-V virtual network driver.
-
-config HYPERV_MOUSE
- tristate "Microsoft Hyper-V mouse driver"
- depends on HYPERV && HID
- help
- Select this option to enable the Hyper-V mouse driver.
diff --git a/drivers/staging/hv/Makefile b/drivers/staging/hv/Makefile
index e071c12..3a2751e 100644
--- a/drivers/staging/hv/Makefile
+++ b/drivers/staging/hv/Makefile
@@ -1,7 +1,6 @@
obj-$(CONFIG_HYPERV) += hv_timesource.o
obj-$(CONFIG_HYPERV_STORAGE) += hv_storvsc.o
obj-$(CONFIG_HYPERV_NET) += hv_netvsc.o
-obj-$(CONFIG_HYPERV_MOUSE) += hv_mouse.o
hv_storvsc-y := storvsc_drv.o
hv_netvsc-y := netvsc_drv.o netvsc.o rndis_filter.o
diff --git a/drivers/staging/hv/hv_mouse.c b/drivers/staging/hv/hv_mouse.c
deleted file mode 100644
index ccd39c7..0000000
--- a/drivers/staging/hv/hv_mouse.c
+++ /dev/null
@@ -1,599 +0,0 @@
-/*
- * 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 <linux/hyperv.h>
-
-
-struct hv_input_dev_info {
- unsigned int size;
- unsigned short vendor;
- unsigned short product;
- unsigned short version;
- unsigned short reserved[11];
-};
-
-/* 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 {
- SYNTH_HID_PROTOCOL_REQUEST,
- SYNTH_HID_PROTOCOL_RESPONSE,
- SYNTH_HID_INITIAL_DEVICE_INFO,
- SYNTH_HID_INITIAL_DEVICE_INFO_ACK,
- SYNTH_HID_INPUT_REPORT,
- SYNTH_HID_MAX
-};
-
-/*
- * 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 {
- PIPE_MESSAGE_INVALID,
- PIPE_MESSAGE_DATA,
- PIPE_MESSAGE_MAXIMUM
-};
-
-
-struct pipe_prt_msg {
- enum pipe_prot_msg_type type;
- u32 size;
- char data[1];
-};
-
-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;
- unsigned char init_complete;
- struct mousevsc_prt_msg protocol_req;
- struct mousevsc_prt_msg protocol_resp;
- /* Synchronize the request/response if needed */
- struct completion wait_event;
- 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;
- int connected;
- struct hid_device *hid_device;
-};
-
-
-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;
-
- input_dev->device = device;
- hv_set_drvdata(device, input_dev);
- init_completion(&input_dev->wait_event);
-
- return input_dev;
-}
-
-static void free_input_device(struct mousevsc_dev *device)
-{
- kfree(device->hid_desc);
- kfree(device->report_desc);
- hv_set_drvdata(device->device, NULL);
- kfree(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;
-
- memcpy(&input_device->hid_dev_info, &device_info->hid_dev_info,
- sizeof(struct hv_input_dev_info));
-
- desc = &device_info->hid_descriptor;
- WARN_ON(desc->bLength == 0);
-
- input_device->hid_desc = kzalloc(desc->bLength, GFP_ATOMIC);
-
- if (!input_device->hid_desc)
- goto cleanup;
-
- memcpy(input_device->hid_desc, desc, desc->bLength);
-
- input_device->report_desc_size = desc->desc[0].wDescriptorLength;
- if (input_device->report_desc_size == 0)
- goto cleanup;
- input_device->report_desc = kzalloc(input_device->report_desc_size,
- GFP_ATOMIC);
-
- if (!input_device->report_desc)
- 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 = PIPE_MESSAGE_DATA;
- ack.size = sizeof(struct synthhid_device_info_ack);
-
- ack.ack.header.type = SYNTH_HID_INITIAL_DEVICE_INFO_ACK;
- 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)
- goto cleanup;
-
- complete(&input_device->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;
- complete(&input_device->wait_event);
-}
-
-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 = hv_get_drvdata(device);
- struct synthhid_input_report *input_report;
-
- pipe_msg = (struct pipe_prt_msg *)((unsigned long)packet +
- (packet->offset8 << 3));
-
- if (pipe_msg->type != PIPE_MESSAGE_DATA)
- return;
-
- hid_msg = (struct synthhid_msg *)&pipe_msg->data[0];
-
- switch (hid_msg->header.type) {
- case SYNTH_HID_PROTOCOL_RESPONSE:
- memcpy(&input_dev->protocol_resp, pipe_msg,
- pipe_msg->size + sizeof(struct pipe_prt_msg) -
- sizeof(unsigned char));
- complete(&input_dev->wait_event);
- break;
-
- case SYNTH_HID_INITIAL_DEVICE_INFO:
- 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 SYNTH_HID_INPUT_REPORT:
- input_report =
- (struct synthhid_input_report *)&pipe_msg->data[0];
- if (!input_dev->init_complete)
- break;
- hid_input_report(input_dev->hid_device,
- HID_INPUT_REPORT, input_report->buffer,
- input_report->header.size, 1);
- break;
- default:
- pr_err("unsupported hid msg type - type %d len %d",
- hid_msg->header.type, hid_msg->header.size);
- break;
- }
-
-}
-
-static void mousevsc_on_channel_callback(void *context)
-{
- const int packetSize = 0x100;
- int ret = 0;
- struct hv_device *device = (struct hv_device *)context;
-
- u32 bytes_recvd;
- u64 req_id;
- unsigned char packet[0x100];
- struct vmpacket_descriptor *desc;
- unsigned char *buffer = packet;
- int bufferlen = packetSize;
-
-
- 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:
- 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 {
- 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_ATOMIC);
-
- if (buffer == NULL) {
- buffer = packet;
- bufferlen = packetSize;
- break;
- }
- }
- } while (1);
-
- return;
-}
-
-static int mousevsc_connect_to_vsp(struct hv_device *device)
-{
- int ret = 0;
- int t;
- struct mousevsc_dev *input_dev = hv_get_drvdata(device);
- struct mousevsc_prt_msg *request;
- struct mousevsc_prt_msg *response;
-
-
- request = &input_dev->protocol_req;
-
- memset(request, 0, sizeof(struct mousevsc_prt_msg));
-
- request->type = PIPE_MESSAGE_DATA;
- request->size = sizeof(struct synthhid_protocol_request);
-
- request->request.header.type = SYNTH_HID_PROTOCOL_REQUEST;
- request->request.header.size = sizeof(unsigned int);
- request->request.version_requested.version = SYNTHHID_INPUT_VERSION;
-
-
- 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)
- goto cleanup;
-
- t = wait_for_completion_timeout(&input_dev->wait_event, 5*HZ);
- if (t == 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 = -ENODEV;
- goto cleanup;
- }
-
- t = wait_for_completion_timeout(&input_dev->wait_event, 5*HZ);
- if (t == 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)
- ret = -ENOMEM;
-
-cleanup:
-
- return ret;
-}
-
-static int mousevsc_hid_open(struct hid_device *hid)
-{
- return 0;
-}
-
-static void mousevsc_hid_close(struct hid_device *hid)
-{
-}
-
-static struct hid_ll_driver mousevsc_ll_driver = {
- .open = mousevsc_hid_open,
- .close = mousevsc_hid_close,
-};
-
-static struct hid_driver mousevsc_hid_driver;
-
-static void reportdesc_callback(struct hv_device *dev, void *packet, u32 len)
-{
- struct hid_device *hid_dev;
- struct mousevsc_dev *input_device = hv_get_drvdata(dev);
-
- hid_dev = hid_allocate_device();
- if (IS_ERR(hid_dev))
- return;
-
- hid_dev->ll_driver = &mousevsc_ll_driver;
- hid_dev->driver = &mousevsc_hid_driver;
-
- if (hid_parse_report(hid_dev, packet, len))
- return;
-
- hid_dev->bus = BUS_VIRTUAL;
- hid_dev->vendor = input_device->hid_dev_info.vendor;
- hid_dev->product = input_device->hid_dev_info.product;
- hid_dev->version = input_device->hid_dev_info.version;
-
- sprintf(hid_dev->name, "%s", "Microsoft Vmbus HID-compliant Mouse");
-
- if (!hidinput_connect(hid_dev, 0)) {
- hid_dev->claimed |= HID_CLAIMED_INPUT;
-
- input_device->connected = 1;
-
- }
-
- input_device->hid_device = hid_dev;
-}
-
-static int mousevsc_on_device_add(struct hv_device *device)
-{
- int ret = 0;
- struct mousevsc_dev *input_dev;
-
- input_dev = alloc_input_device(device);
-
- if (!input_dev)
- return -ENOMEM;
-
- input_dev->init_complete = false;
-
- 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) {
- free_input_device(input_dev);
- return ret;
- }
-
-
- ret = mousevsc_connect_to_vsp(device);
-
- if (ret != 0) {
- vmbus_close(device->channel);
- free_input_device(input_dev);
- return ret;
- }
-
-
- /* 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;
-
- return ret;
-}
-
-static int mousevsc_probe(struct hv_device *dev,
- const struct hv_vmbus_device_id *dev_id)
-{
-
- return mousevsc_on_device_add(dev);
-
-}
-
-static int mousevsc_remove(struct hv_device *dev)
-{
- struct mousevsc_dev *input_dev = hv_get_drvdata(dev);
-
- vmbus_close(dev->channel);
-
- if (input_dev->connected) {
- hidinput_disconnect(input_dev->hid_device);
- input_dev->connected = 0;
- hid_destroy_device(input_dev->hid_device);
- }
-
- free_input_device(input_dev);
-
- return 0;
-}
-
-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) },
- { },
-};
-
-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);
--
1.7.4.1
--
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