215 lines
7.1 KiB
C
215 lines
7.1 KiB
C
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/* SPDX-License-Identifier: (GPL-2.0 OR CDDL-1.0) */
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/* Copyright (C) 2010-2016 Oracle Corporation */
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#ifndef __VBOXGUEST_CORE_H__
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#define __VBOXGUEST_CORE_H__
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/miscdevice.h>
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#include <linux/spinlock.h>
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#include <linux/wait.h>
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#include <linux/workqueue.h>
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#include <linux/vboxguest.h>
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#include "vmmdev.h"
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/*
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* The mainline kernel version (this version) of the vboxguest module
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* contained a bug where it defined VBGL_IOCTL_VMMDEV_REQUEST_BIG and
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* VBGL_IOCTL_LOG using _IOC(_IOC_READ | _IOC_WRITE, 'V', ...) instead
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* of _IO(V, ...) as the out of tree VirtualBox upstream version does.
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*
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* These _ALT definitions keep compatibility with the wrong defines the
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* mainline kernel version used for a while.
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* Note the VirtualBox userspace bits have always been built against
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* VirtualBox upstream's headers, so this is likely not necessary. But
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* we must never break our ABI so we keep these around to be 100% sure.
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*/
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#define VBG_IOCTL_VMMDEV_REQUEST_BIG_ALT _IOC(_IOC_READ | _IOC_WRITE, 'V', 3, 0)
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#define VBG_IOCTL_LOG_ALT(s) _IOC(_IOC_READ | _IOC_WRITE, 'V', 9, s)
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struct vbg_session;
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/** VBox guest memory balloon. */
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struct vbg_mem_balloon {
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/** Work handling VMMDEV_EVENT_BALLOON_CHANGE_REQUEST events */
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struct work_struct work;
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/** Pre-allocated vmmdev_memballoon_info req for query */
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struct vmmdev_memballoon_info *get_req;
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/** Pre-allocated vmmdev_memballoon_change req for inflate / deflate */
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struct vmmdev_memballoon_change *change_req;
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/** The current number of chunks in the balloon. */
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u32 chunks;
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/** The maximum number of chunks in the balloon. */
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u32 max_chunks;
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/**
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* Array of pointers to page arrays. A page * array is allocated for
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* each chunk when inflating, and freed when the deflating.
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*/
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struct page ***pages;
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};
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/**
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* Per bit usage tracker for a u32 mask.
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*
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* Used for optimal handling of guest properties and event filter.
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*/
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struct vbg_bit_usage_tracker {
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/** Per bit usage counters. */
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u32 per_bit_usage[32];
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/** The current mask according to per_bit_usage. */
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u32 mask;
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};
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/** VBox guest device (data) extension. */
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struct vbg_dev {
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struct device *dev;
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/** The base of the adapter I/O ports. */
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u16 io_port;
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/** Pointer to the mapping of the VMMDev adapter memory. */
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struct vmmdev_memory *mmio;
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/** Host version */
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char host_version[64];
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/** Host features */
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unsigned int host_features;
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/**
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* Dummy page and vmap address for reserved kernel virtual-address
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* space for the guest mappings, only used on hosts lacking vtx.
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*/
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struct page *guest_mappings_dummy_page;
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void *guest_mappings;
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/** Spinlock protecting pending_events. */
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spinlock_t event_spinlock;
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/** Preallocated struct vmmdev_events for the IRQ handler. */
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struct vmmdev_events *ack_events_req;
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/** Wait-for-event list for threads waiting for multiple events. */
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wait_queue_head_t event_wq;
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/** Mask of pending events. */
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u32 pending_events;
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/** Wait-for-event list for threads waiting on HGCM async completion. */
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wait_queue_head_t hgcm_wq;
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/** Pre-allocated hgcm cancel2 req. for cancellation on timeout */
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struct vmmdev_hgcm_cancel2 *cancel_req;
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/** Mutex protecting cancel_req accesses */
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struct mutex cancel_req_mutex;
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/** Pre-allocated mouse-status request for the input-device handling. */
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struct vmmdev_mouse_status *mouse_status_req;
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/** Input device for reporting abs mouse coordinates to the guest. */
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struct input_dev *input;
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/** Memory balloon information. */
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struct vbg_mem_balloon mem_balloon;
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/** Lock for session related items in vbg_dev and vbg_session */
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struct mutex session_mutex;
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/** Events we won't permit anyone to filter out. */
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u32 fixed_events;
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/**
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* Usage counters for the host events (excludes fixed events),
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* Protected by session_mutex.
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*/
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struct vbg_bit_usage_tracker event_filter_tracker;
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/**
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* The event filter last reported to the host (or UINT32_MAX).
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* Protected by session_mutex.
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*/
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u32 event_filter_host;
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/**
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* Guest capabilities which have been switched to acquire_mode.
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*/
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u32 acquire_mode_guest_caps;
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/**
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* Guest capabilities acquired by vbg_acquire_session_capabilities().
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* Only one session can acquire a capability at a time.
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*/
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u32 acquired_guest_caps;
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/**
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* Usage counters for guest capabilities requested through
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* vbg_set_session_capabilities(). Indexed by capability bit
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* number, one count per session using a capability.
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* Protected by session_mutex.
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*/
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struct vbg_bit_usage_tracker set_guest_caps_tracker;
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/**
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* The guest capabilities last reported to the host (or UINT32_MAX).
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* Protected by session_mutex.
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*/
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u32 guest_caps_host;
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/**
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* Heartbeat timer which fires with interval
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* cNsHearbeatInterval and its handler sends
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* VMMDEVREQ_GUEST_HEARTBEAT to VMMDev.
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*/
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struct timer_list heartbeat_timer;
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/** Heartbeat timer interval in ms. */
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int heartbeat_interval_ms;
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/** Preallocated VMMDEVREQ_GUEST_HEARTBEAT request. */
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struct vmmdev_request_header *guest_heartbeat_req;
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/** "vboxguest" char-device */
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struct miscdevice misc_device;
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/** "vboxuser" char-device */
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struct miscdevice misc_device_user;
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};
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/** The VBoxGuest per session data. */
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struct vbg_session {
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/** Pointer to the device extension. */
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struct vbg_dev *gdev;
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/**
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* Array containing HGCM client IDs associated with this session.
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* These will be automatically disconnected when the session is closed.
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* Protected by vbg_gdev.session_mutex.
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*/
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u32 hgcm_client_ids[64];
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/**
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* Host events requested by the session.
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* An event type requested in any guest session will be added to the
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* host filter. Protected by vbg_gdev.session_mutex.
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*/
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u32 event_filter;
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/**
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* Guest capabilities acquired by vbg_acquire_session_capabilities().
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* Only one session can acquire a capability at a time.
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*/
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u32 acquired_guest_caps;
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/**
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* Guest capabilities set through vbg_set_session_capabilities().
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* A capability claimed by any guest session will be reported to the
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* host. Protected by vbg_gdev.session_mutex.
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*/
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u32 set_guest_caps;
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/** VMMDEV_REQUESTOR_* flags */
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u32 requestor;
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/** Set on CANCEL_ALL_WAITEVENTS, protected by vbg_devevent_spinlock. */
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bool cancel_waiters;
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};
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int vbg_core_init(struct vbg_dev *gdev, u32 fixed_events);
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void vbg_core_exit(struct vbg_dev *gdev);
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struct vbg_session *vbg_core_open_session(struct vbg_dev *gdev, u32 requestor);
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void vbg_core_close_session(struct vbg_session *session);
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int vbg_core_ioctl(struct vbg_session *session, unsigned int req, void *data);
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int vbg_core_set_mouse_status(struct vbg_dev *gdev, u32 features);
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irqreturn_t vbg_core_isr(int irq, void *dev_id);
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void vbg_linux_mouse_event(struct vbg_dev *gdev);
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/* Private (non exported) functions form vboxguest_utils.c */
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void *vbg_req_alloc(size_t len, enum vmmdev_request_type req_type,
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u32 requestor);
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void vbg_req_free(void *req, size_t len);
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int vbg_req_perform(struct vbg_dev *gdev, void *req);
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int vbg_hgcm_call32(
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struct vbg_dev *gdev, u32 requestor, u32 client_id, u32 function,
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u32 timeout_ms, struct vmmdev_hgcm_function_parameter32 *parm32,
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u32 parm_count, int *vbox_status);
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#endif
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