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-rw-r--r--drivers/virt/vboxguest/vboxguest_core.h174
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
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