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In a virtual machine, VMCI is exposed as a regular PCI device. The primary communication mechanisms supported are a point-to-point bidirectional transport based on a pair of memory-mapped queues, and asynchronous notifications in the form of datagrams and doorbells. These features are available to kernel level components such as vSockets through the VMCI kernel API. In addition to this, the VMCI kernel API provides support for receiving events related to the state of the VMCI communication channels, and the virtual machine itself. Submitted by: Vishnu Dasa <vdasa@vmware.com> Reviewed by: bcr, imp Obtained from: VMware Differential Revision: https://reviews.freebsd.org/D14289
94 lines
3 KiB
C
94 lines
3 KiB
C
/*-
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* Copyright (c) 2018 VMware, Inc. All Rights Reserved.
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*
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* SPDX-License-Identifier: (BSD-2-Clause AND GPL-2.0)
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*
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* $FreeBSD$
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*/
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/* This file defines helper functions */
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#ifndef _VMCI_KERNEL_IF_H_
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#define _VMCI_KERNEL_IF_H_
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#include <sys/param.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/queue.h>
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#include <sys/sema.h>
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#include "vmci_defs.h"
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#define VMCI_MEMORY_NORMAL 0x0
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#define VMCI_MEMORY_ATOMIC 0x1
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#define vmci_list(_l) LIST_HEAD(, _l)
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#define vmci_list_item(_l) LIST_ENTRY(_l)
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#define vmci_list_init(_l) LIST_INIT(_l)
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#define vmci_list_empty(_l) LIST_EMPTY(_l)
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#define vmci_list_first(_l) LIST_FIRST(_l)
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#define vmci_list_next(e, f) LIST_NEXT(e, f)
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#define vmci_list_insert(_l, _e, n) LIST_INSERT_HEAD(_l, _e, n)
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#define vmci_list_remove(_e, n) LIST_REMOVE(_e, n)
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#define vmci_list_scan(v, _l, n) LIST_FOREACH(v, _l, n)
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#define vmci_list_scan_safe(_e, _l, n, t) \
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LIST_FOREACH_SAFE(_e, _l, n, t)
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#define vmci_list_swap(_l1, _l2, t, f) LIST_SWAP(_l1, _l2, t, f)
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typedef unsigned short int vmci_io_port;
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typedef int vmci_io_handle;
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void vmci_read_port_bytes(vmci_io_handle handle, vmci_io_port port,
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uint8_t *buffer, size_t buffer_length);
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typedef struct mtx vmci_lock;
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int vmci_init_lock(vmci_lock *lock, char *name);
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void vmci_cleanup_lock(vmci_lock *lock);
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void vmci_grab_lock(vmci_lock *lock);
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void vmci_release_lock(vmci_lock *lock);
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void vmci_grab_lock_bh(vmci_lock *lock);
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void vmci_release_lock_bh(vmci_lock *lock);
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void *vmci_alloc_kernel_mem(size_t size, int flags);
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void vmci_free_kernel_mem(void *ptr, size_t size);
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typedef struct sema vmci_event;
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typedef int (*vmci_event_release_cb)(void *client_data);
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void vmci_create_event(vmci_event *event);
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void vmci_destroy_event(vmci_event *event);
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void vmci_signal_event(vmci_event *event);
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void vmci_wait_on_event(vmci_event *event, vmci_event_release_cb release_cb,
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void *client_data);
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bool vmci_wait_on_event_interruptible(vmci_event *event,
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vmci_event_release_cb release_cb, void *client_data);
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typedef void (vmci_work_fn)(void *data);
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bool vmci_can_schedule_delayed_work(void);
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int vmci_schedule_delayed_work(vmci_work_fn *work_fn, void *data);
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void vmci_delayed_work_cb(void *context, int data);
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typedef struct mtx vmci_mutex;
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int vmci_mutex_init(vmci_mutex *mutex, char *name);
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void vmci_mutex_destroy(vmci_mutex *mutex);
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void vmci_mutex_acquire(vmci_mutex *mutex);
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void vmci_mutex_release(vmci_mutex *mutex);
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void *vmci_alloc_queue(uint64_t size, uint32_t flags);
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void vmci_free_queue(void *q, uint64_t size);
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typedef PPN *vmci_ppn_list;
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struct ppn_set {
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uint64_t num_produce_pages;
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uint64_t num_consume_pages;
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vmci_ppn_list produce_ppns;
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vmci_ppn_list consume_ppns;
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bool initialized;
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};
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int vmci_alloc_ppn_set(void *produce_q, uint64_t num_produce_pages,
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void *consume_q, uint64_t num_consume_pages,
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struct ppn_set *ppn_set);
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void vmci_free_ppn_set(struct ppn_set *ppn_set);
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int vmci_populate_ppn_list(uint8_t *call_buf, const struct ppn_set *ppnset);
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#endif /* !_VMCI_KERNEL_IF_H_ */
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