v4.19.13 snapshot.
diff --git a/drivers/virt/vboxguest/vboxguest_linux.c b/drivers/virt/vboxguest/vboxguest_linux.c
new file mode 100644
index 0000000..6e2a961
--- /dev/null
+++ b/drivers/virt/vboxguest/vboxguest_linux.c
@@ -0,0 +1,481 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * vboxguest linux pci driver, char-dev and input-device code,
+ *
+ * Copyright (C) 2006-2016 Oracle Corporation
+ */
+
+#include <linux/input.h>
+#include <linux/kernel.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/poll.h>
+#include <linux/vbox_utils.h>
+#include "vboxguest_core.h"
+
+/** The device name. */
+#define DEVICE_NAME "vboxguest"
+/** The device name for the device node open to everyone. */
+#define DEVICE_NAME_USER "vboxuser"
+/** VirtualBox PCI vendor ID. */
+#define VBOX_VENDORID 0x80ee
+/** VMMDev PCI card product ID. */
+#define VMMDEV_DEVICEID 0xcafe
+
+/** Mutex protecting the global vbg_gdev pointer used by vbg_get/put_gdev. */
+static DEFINE_MUTEX(vbg_gdev_mutex);
+/** Global vbg_gdev pointer used by vbg_get/put_gdev. */
+static struct vbg_dev *vbg_gdev;
+
+static int vbg_misc_device_open(struct inode *inode, struct file *filp)
+{
+ struct vbg_session *session;
+ struct vbg_dev *gdev;
+
+ /* misc_open sets filp->private_data to our misc device */
+ gdev = container_of(filp->private_data, struct vbg_dev, misc_device);
+
+ session = vbg_core_open_session(gdev, false);
+ if (IS_ERR(session))
+ return PTR_ERR(session);
+
+ filp->private_data = session;
+ return 0;
+}
+
+static int vbg_misc_device_user_open(struct inode *inode, struct file *filp)
+{
+ struct vbg_session *session;
+ struct vbg_dev *gdev;
+
+ /* misc_open sets filp->private_data to our misc device */
+ gdev = container_of(filp->private_data, struct vbg_dev,
+ misc_device_user);
+
+ session = vbg_core_open_session(gdev, false);
+ if (IS_ERR(session))
+ return PTR_ERR(session);
+
+ filp->private_data = session;
+ return 0;
+}
+
+/**
+ * Close device.
+ * Return: 0 on success, negated errno on failure.
+ * @inode: Pointer to inode info structure.
+ * @filp: Associated file pointer.
+ */
+static int vbg_misc_device_close(struct inode *inode, struct file *filp)
+{
+ vbg_core_close_session(filp->private_data);
+ filp->private_data = NULL;
+ return 0;
+}
+
+/**
+ * Device I/O Control entry point.
+ * Return: 0 on success, negated errno on failure.
+ * @filp: Associated file pointer.
+ * @req: The request specified to ioctl().
+ * @arg: The argument specified to ioctl().
+ */
+static long vbg_misc_device_ioctl(struct file *filp, unsigned int req,
+ unsigned long arg)
+{
+ struct vbg_session *session = filp->private_data;
+ size_t returned_size, size;
+ struct vbg_ioctl_hdr hdr;
+ bool is_vmmdev_req;
+ int ret = 0;
+ void *buf;
+
+ if (copy_from_user(&hdr, (void *)arg, sizeof(hdr)))
+ return -EFAULT;
+
+ if (hdr.version != VBG_IOCTL_HDR_VERSION)
+ return -EINVAL;
+
+ if (hdr.size_in < sizeof(hdr) ||
+ (hdr.size_out && hdr.size_out < sizeof(hdr)))
+ return -EINVAL;
+
+ size = max(hdr.size_in, hdr.size_out);
+ if (_IOC_SIZE(req) && _IOC_SIZE(req) != size)
+ return -EINVAL;
+ if (size > SZ_16M)
+ return -E2BIG;
+
+ /*
+ * IOCTL_VMMDEV_REQUEST needs the buffer to be below 4G to avoid
+ * the need for a bounce-buffer and another copy later on.
+ */
+ is_vmmdev_req = (req & ~IOCSIZE_MASK) == VBG_IOCTL_VMMDEV_REQUEST(0) ||
+ req == VBG_IOCTL_VMMDEV_REQUEST_BIG;
+
+ if (is_vmmdev_req)
+ buf = vbg_req_alloc(size, VBG_IOCTL_HDR_TYPE_DEFAULT);
+ else
+ buf = kmalloc(size, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ *((struct vbg_ioctl_hdr *)buf) = hdr;
+ if (copy_from_user(buf + sizeof(hdr), (void *)arg + sizeof(hdr),
+ hdr.size_in - sizeof(hdr))) {
+ ret = -EFAULT;
+ goto out;
+ }
+ if (hdr.size_in < size)
+ memset(buf + hdr.size_in, 0, size - hdr.size_in);
+
+ ret = vbg_core_ioctl(session, req, buf);
+ if (ret)
+ goto out;
+
+ returned_size = ((struct vbg_ioctl_hdr *)buf)->size_out;
+ if (returned_size > size) {
+ vbg_debug("%s: too much output data %zu > %zu\n",
+ __func__, returned_size, size);
+ returned_size = size;
+ }
+ if (copy_to_user((void *)arg, buf, returned_size) != 0)
+ ret = -EFAULT;
+
+out:
+ if (is_vmmdev_req)
+ vbg_req_free(buf, size);
+ else
+ kfree(buf);
+
+ return ret;
+}
+
+/** The file_operations structures. */
+static const struct file_operations vbg_misc_device_fops = {
+ .owner = THIS_MODULE,
+ .open = vbg_misc_device_open,
+ .release = vbg_misc_device_close,
+ .unlocked_ioctl = vbg_misc_device_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = vbg_misc_device_ioctl,
+#endif
+};
+static const struct file_operations vbg_misc_device_user_fops = {
+ .owner = THIS_MODULE,
+ .open = vbg_misc_device_user_open,
+ .release = vbg_misc_device_close,
+ .unlocked_ioctl = vbg_misc_device_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = vbg_misc_device_ioctl,
+#endif
+};
+
+/**
+ * Called when the input device is first opened.
+ *
+ * Sets up absolute mouse reporting.
+ */
+static int vbg_input_open(struct input_dev *input)
+{
+ struct vbg_dev *gdev = input_get_drvdata(input);
+ u32 feat = VMMDEV_MOUSE_GUEST_CAN_ABSOLUTE | VMMDEV_MOUSE_NEW_PROTOCOL;
+ int ret;
+
+ ret = vbg_core_set_mouse_status(gdev, feat);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+/**
+ * Called if all open handles to the input device are closed.
+ *
+ * Disables absolute reporting.
+ */
+static void vbg_input_close(struct input_dev *input)
+{
+ struct vbg_dev *gdev = input_get_drvdata(input);
+
+ vbg_core_set_mouse_status(gdev, 0);
+}
+
+/**
+ * Creates the kernel input device.
+ *
+ * Return: 0 on success, negated errno on failure.
+ */
+static int vbg_create_input_device(struct vbg_dev *gdev)
+{
+ struct input_dev *input;
+
+ input = devm_input_allocate_device(gdev->dev);
+ if (!input)
+ return -ENOMEM;
+
+ input->id.bustype = BUS_PCI;
+ input->id.vendor = VBOX_VENDORID;
+ input->id.product = VMMDEV_DEVICEID;
+ input->open = vbg_input_open;
+ input->close = vbg_input_close;
+ input->dev.parent = gdev->dev;
+ input->name = "VirtualBox mouse integration";
+
+ input_set_abs_params(input, ABS_X, VMMDEV_MOUSE_RANGE_MIN,
+ VMMDEV_MOUSE_RANGE_MAX, 0, 0);
+ input_set_abs_params(input, ABS_Y, VMMDEV_MOUSE_RANGE_MIN,
+ VMMDEV_MOUSE_RANGE_MAX, 0, 0);
+ input_set_capability(input, EV_KEY, BTN_MOUSE);
+ input_set_drvdata(input, gdev);
+
+ gdev->input = input;
+
+ return input_register_device(gdev->input);
+}
+
+static ssize_t host_version_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct vbg_dev *gdev = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%s\n", gdev->host_version);
+}
+
+static ssize_t host_features_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct vbg_dev *gdev = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%#x\n", gdev->host_features);
+}
+
+static DEVICE_ATTR_RO(host_version);
+static DEVICE_ATTR_RO(host_features);
+
+/**
+ * Does the PCI detection and init of the device.
+ *
+ * Return: 0 on success, negated errno on failure.
+ */
+static int vbg_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
+{
+ struct device *dev = &pci->dev;
+ resource_size_t io, io_len, mmio, mmio_len;
+ struct vmmdev_memory *vmmdev;
+ struct vbg_dev *gdev;
+ int ret;
+
+ gdev = devm_kzalloc(dev, sizeof(*gdev), GFP_KERNEL);
+ if (!gdev)
+ return -ENOMEM;
+
+ ret = pci_enable_device(pci);
+ if (ret != 0) {
+ vbg_err("vboxguest: Error enabling device: %d\n", ret);
+ return ret;
+ }
+
+ ret = -ENODEV;
+
+ io = pci_resource_start(pci, 0);
+ io_len = pci_resource_len(pci, 0);
+ if (!io || !io_len) {
+ vbg_err("vboxguest: Error IO-port resource (0) is missing\n");
+ goto err_disable_pcidev;
+ }
+ if (devm_request_region(dev, io, io_len, DEVICE_NAME) == NULL) {
+ vbg_err("vboxguest: Error could not claim IO resource\n");
+ ret = -EBUSY;
+ goto err_disable_pcidev;
+ }
+
+ mmio = pci_resource_start(pci, 1);
+ mmio_len = pci_resource_len(pci, 1);
+ if (!mmio || !mmio_len) {
+ vbg_err("vboxguest: Error MMIO resource (1) is missing\n");
+ goto err_disable_pcidev;
+ }
+
+ if (devm_request_mem_region(dev, mmio, mmio_len, DEVICE_NAME) == NULL) {
+ vbg_err("vboxguest: Error could not claim MMIO resource\n");
+ ret = -EBUSY;
+ goto err_disable_pcidev;
+ }
+
+ vmmdev = devm_ioremap(dev, mmio, mmio_len);
+ if (!vmmdev) {
+ vbg_err("vboxguest: Error ioremap failed; MMIO addr=%pap size=%pap\n",
+ &mmio, &mmio_len);
+ goto err_disable_pcidev;
+ }
+
+ /* Validate MMIO region version and size. */
+ if (vmmdev->version != VMMDEV_MEMORY_VERSION ||
+ vmmdev->size < 32 || vmmdev->size > mmio_len) {
+ vbg_err("vboxguest: Bogus VMMDev memory; version=%08x (expected %08x) size=%d (expected <= %d)\n",
+ vmmdev->version, VMMDEV_MEMORY_VERSION,
+ vmmdev->size, (int)mmio_len);
+ goto err_disable_pcidev;
+ }
+
+ gdev->io_port = io;
+ gdev->mmio = vmmdev;
+ gdev->dev = dev;
+ gdev->misc_device.minor = MISC_DYNAMIC_MINOR;
+ gdev->misc_device.name = DEVICE_NAME;
+ gdev->misc_device.fops = &vbg_misc_device_fops;
+ gdev->misc_device_user.minor = MISC_DYNAMIC_MINOR;
+ gdev->misc_device_user.name = DEVICE_NAME_USER;
+ gdev->misc_device_user.fops = &vbg_misc_device_user_fops;
+
+ ret = vbg_core_init(gdev, VMMDEV_EVENT_MOUSE_POSITION_CHANGED);
+ if (ret)
+ goto err_disable_pcidev;
+
+ ret = vbg_create_input_device(gdev);
+ if (ret) {
+ vbg_err("vboxguest: Error creating input device: %d\n", ret);
+ goto err_vbg_core_exit;
+ }
+
+ ret = devm_request_irq(dev, pci->irq, vbg_core_isr, IRQF_SHARED,
+ DEVICE_NAME, gdev);
+ if (ret) {
+ vbg_err("vboxguest: Error requesting irq: %d\n", ret);
+ goto err_vbg_core_exit;
+ }
+
+ ret = misc_register(&gdev->misc_device);
+ if (ret) {
+ vbg_err("vboxguest: Error misc_register %s failed: %d\n",
+ DEVICE_NAME, ret);
+ goto err_vbg_core_exit;
+ }
+
+ ret = misc_register(&gdev->misc_device_user);
+ if (ret) {
+ vbg_err("vboxguest: Error misc_register %s failed: %d\n",
+ DEVICE_NAME_USER, ret);
+ goto err_unregister_misc_device;
+ }
+
+ mutex_lock(&vbg_gdev_mutex);
+ if (!vbg_gdev)
+ vbg_gdev = gdev;
+ else
+ ret = -EBUSY;
+ mutex_unlock(&vbg_gdev_mutex);
+
+ if (ret) {
+ vbg_err("vboxguest: Error more then 1 vbox guest pci device\n");
+ goto err_unregister_misc_device_user;
+ }
+
+ pci_set_drvdata(pci, gdev);
+ device_create_file(dev, &dev_attr_host_version);
+ device_create_file(dev, &dev_attr_host_features);
+
+ vbg_info("vboxguest: misc device minor %d, IRQ %d, I/O port %x, MMIO at %pap (size %pap)\n",
+ gdev->misc_device.minor, pci->irq, gdev->io_port,
+ &mmio, &mmio_len);
+
+ return 0;
+
+err_unregister_misc_device_user:
+ misc_deregister(&gdev->misc_device_user);
+err_unregister_misc_device:
+ misc_deregister(&gdev->misc_device);
+err_vbg_core_exit:
+ vbg_core_exit(gdev);
+err_disable_pcidev:
+ pci_disable_device(pci);
+
+ return ret;
+}
+
+static void vbg_pci_remove(struct pci_dev *pci)
+{
+ struct vbg_dev *gdev = pci_get_drvdata(pci);
+
+ mutex_lock(&vbg_gdev_mutex);
+ vbg_gdev = NULL;
+ mutex_unlock(&vbg_gdev_mutex);
+
+ device_remove_file(gdev->dev, &dev_attr_host_features);
+ device_remove_file(gdev->dev, &dev_attr_host_version);
+ misc_deregister(&gdev->misc_device_user);
+ misc_deregister(&gdev->misc_device);
+ vbg_core_exit(gdev);
+ pci_disable_device(pci);
+}
+
+struct vbg_dev *vbg_get_gdev(void)
+{
+ mutex_lock(&vbg_gdev_mutex);
+
+ /*
+ * Note on success we keep the mutex locked until vbg_put_gdev(),
+ * this stops vbg_pci_remove from removing the device from underneath
+ * vboxsf. vboxsf will only hold a reference for a short while.
+ */
+ if (vbg_gdev)
+ return vbg_gdev;
+
+ mutex_unlock(&vbg_gdev_mutex);
+ return ERR_PTR(-ENODEV);
+}
+EXPORT_SYMBOL(vbg_get_gdev);
+
+void vbg_put_gdev(struct vbg_dev *gdev)
+{
+ WARN_ON(gdev != vbg_gdev);
+ mutex_unlock(&vbg_gdev_mutex);
+}
+EXPORT_SYMBOL(vbg_put_gdev);
+
+/**
+ * Callback for mouse events.
+ *
+ * This is called at the end of the ISR, after leaving the event spinlock, if
+ * VMMDEV_EVENT_MOUSE_POSITION_CHANGED was raised by the host.
+ *
+ * @gdev: The device extension.
+ */
+void vbg_linux_mouse_event(struct vbg_dev *gdev)
+{
+ int rc;
+
+ /* Report events to the kernel input device */
+ gdev->mouse_status_req->mouse_features = 0;
+ gdev->mouse_status_req->pointer_pos_x = 0;
+ gdev->mouse_status_req->pointer_pos_y = 0;
+ rc = vbg_req_perform(gdev, gdev->mouse_status_req);
+ if (rc >= 0) {
+ input_report_abs(gdev->input, ABS_X,
+ gdev->mouse_status_req->pointer_pos_x);
+ input_report_abs(gdev->input, ABS_Y,
+ gdev->mouse_status_req->pointer_pos_y);
+ input_sync(gdev->input);
+ }
+}
+
+static const struct pci_device_id vbg_pci_ids[] = {
+ { .vendor = VBOX_VENDORID, .device = VMMDEV_DEVICEID },
+ {}
+};
+MODULE_DEVICE_TABLE(pci, vbg_pci_ids);
+
+static struct pci_driver vbg_pci_driver = {
+ .name = DEVICE_NAME,
+ .id_table = vbg_pci_ids,
+ .probe = vbg_pci_probe,
+ .remove = vbg_pci_remove,
+};
+
+module_pci_driver(vbg_pci_driver);
+
+MODULE_AUTHOR("Oracle Corporation");
+MODULE_DESCRIPTION("Oracle VM VirtualBox Guest Additions for Linux Module");
+MODULE_LICENSE("GPL");