diff options
Diffstat (limited to 'drivers/virt/vboxguest/vboxguest_core.h')
| -rw-r--r-- | drivers/virt/vboxguest/vboxguest_core.h | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/drivers/virt/vboxguest/vboxguest_core.h b/drivers/virt/vboxguest/vboxguest_core.h new file mode 100644 index 000000000000..6c784bf4fa6d --- /dev/null +++ b/drivers/virt/vboxguest/vboxguest_core.h @@ -0,0 +1,174 @@ +/* SPDX-License-Identifier: (GPL-2.0 OR CDDL-1.0) */ +/* Copyright (C) 2010-2016 Oracle Corporation */ + +#ifndef __VBOXGUEST_CORE_H__ +#define __VBOXGUEST_CORE_H__ + +#include <linux/input.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/list.h> +#include <linux/miscdevice.h> +#include <linux/spinlock.h> +#include <linux/wait.h> +#include <linux/workqueue.h> +#include <linux/vboxguest.h> +#include "vmmdev.h" + +struct vbg_session; + +/** VBox guest memory balloon. */ +struct vbg_mem_balloon { + /** Work handling VMMDEV_EVENT_BALLOON_CHANGE_REQUEST events */ + struct work_struct work; + /** Pre-allocated vmmdev_memballoon_info req for query */ + struct vmmdev_memballoon_info *get_req; + /** Pre-allocated vmmdev_memballoon_change req for inflate / deflate */ + struct vmmdev_memballoon_change *change_req; + /** The current number of chunks in the balloon. */ + u32 chunks; + /** The maximum number of chunks in the balloon. */ + u32 max_chunks; + /** + * Array of pointers to page arrays. A page * array is allocated for + * each chunk when inflating, and freed when the deflating. + */ + struct page ***pages; +}; + +/** + * Per bit usage tracker for a u32 mask. + * + * Used for optimal handling of guest properties and event filter. + */ +struct vbg_bit_usage_tracker { + /** Per bit usage counters. */ + u32 per_bit_usage[32]; + /** The current mask according to per_bit_usage. */ + u32 mask; +}; + +/** VBox guest device (data) extension. */ +struct vbg_dev { + struct device *dev; + /** The base of the adapter I/O ports. */ + u16 io_port; + /** Pointer to the mapping of the VMMDev adapter memory. */ + struct vmmdev_memory *mmio; + /** Host version */ + char host_version[64]; + /** Host features */ + unsigned int host_features; + /** + * Dummy page and vmap address for reserved kernel virtual-address + * space for the guest mappings, only used on hosts lacking vtx. + */ + struct page *guest_mappings_dummy_page; + void *guest_mappings; + /** Spinlock protecting pending_events. */ + spinlock_t event_spinlock; + /** Preallocated struct vmmdev_events for the IRQ handler. */ + struct vmmdev_events *ack_events_req; + /** Wait-for-event list for threads waiting for multiple events. */ + wait_queue_head_t event_wq; + /** Mask of pending events. */ + u32 pending_events; + /** Wait-for-event list for threads waiting on HGCM async completion. */ + wait_queue_head_t hgcm_wq; + /** Pre-allocated hgcm cancel2 req. for cancellation on timeout */ + struct vmmdev_hgcm_cancel2 *cancel_req; + /** Mutex protecting cancel_req accesses */ + struct mutex cancel_req_mutex; + /** Pre-allocated mouse-status request for the input-device handling. */ + struct vmmdev_mouse_status *mouse_status_req; + /** Input device for reporting abs mouse coordinates to the guest. */ + struct input_dev *input; + + /** Memory balloon information. */ + struct vbg_mem_balloon mem_balloon; + + /** Lock for session related items in vbg_dev and vbg_session */ + struct mutex session_mutex; + /** Events we won't permit anyone to filter out. */ + u32 fixed_events; + /** + * Usage counters for the host events (excludes fixed events), + * Protected by session_mutex. + */ + struct vbg_bit_usage_tracker event_filter_tracker; + /** + * The event filter last reported to the host (or UINT32_MAX). + * Protected by session_mutex. + */ + u32 event_filter_host; + + /** + * Usage counters for guest capabilities. Indexed by capability bit + * number, one count per session using a capability. + * Protected by session_mutex. + */ + struct vbg_bit_usage_tracker guest_caps_tracker; + /** + * The guest capabilities last reported to the host (or UINT32_MAX). + * Protected by session_mutex. + */ + u32 guest_caps_host; + + /** + * Heartbeat timer which fires with interval + * cNsHearbeatInterval and its handler sends + * VMMDEVREQ_GUEST_HEARTBEAT to VMMDev. + */ + struct timer_list heartbeat_timer; + /** Heartbeat timer interval in ms. */ + int heartbeat_interval_ms; + /** Preallocated VMMDEVREQ_GUEST_HEARTBEAT request. */ + struct vmmdev_request_header *guest_heartbeat_req; + + /** "vboxguest" char-device */ + struct miscdevice misc_device; + /** "vboxuser" char-device */ + struct miscdevice misc_device_user; +}; + +/** The VBoxGuest per session data. */ +struct vbg_session { + /** Pointer to the device extension. */ + struct vbg_dev *gdev; + + /** + * Array containing HGCM client IDs associated with this session. + * These will be automatically disconnected when the session is closed. + * Protected by vbg_gdev.session_mutex. + */ + u32 hgcm_client_ids[64]; + /** + * Host events requested by the session. + * An event type requested in any guest session will be added to the + * host filter. Protected by vbg_gdev.session_mutex. + */ + u32 event_filter; + /** + * Guest capabilities for this session. + * A capability claimed by any guest session will be reported to the + * host. Protected by vbg_gdev.session_mutex. + */ + u32 guest_caps; + /** Does this session belong to a root process or a user one? */ + bool user_session; + /** Set on CANCEL_ALL_WAITEVENTS, protected by vbg_devevent_spinlock. */ + bool cancel_waiters; +}; + +int vbg_core_init(struct vbg_dev *gdev, u32 fixed_events); +void vbg_core_exit(struct vbg_dev *gdev); +struct vbg_session *vbg_core_open_session(struct vbg_dev *gdev, bool user); +void vbg_core_close_session(struct vbg_session *session); +int vbg_core_ioctl(struct vbg_session *session, unsigned int req, void *data); +int vbg_core_set_mouse_status(struct vbg_dev *gdev, u32 features); + +irqreturn_t vbg_core_isr(int irq, void *dev_id); + +void vbg_linux_mouse_event(struct vbg_dev *gdev); + +#endif |