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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* VMware VMCI Driver
*
* Copyright (C) 2012 VMware, Inc. All rights reserved.
*/
#ifndef _VMCI_DATAGRAM_H_
#define _VMCI_DATAGRAM_H_
#include <linux/types.h>
#include <linux/list.h>
#include "vmci_context.h"
#define VMCI_MAX_DELAYED_DG_HOST_QUEUE_SIZE 256
/*
* The struct vmci_datagram_queue_entry is a queue header for the in-kernel VMCI
* datagram queues. It is allocated in non-paged memory, as the
* content is accessed while holding a spinlock. The pending datagram
* itself may be allocated from paged memory. We shadow the size of
* the datagram in the non-paged queue entry as this size is used
* while holding the same spinlock as above.
*/
struct vmci_datagram_queue_entry {
struct list_head list_item; /* For queuing. */
size_t dg_size; /* Size of datagram. */
struct vmci_datagram *dg; /* Pending datagram. */
};
/* VMCIDatagramSendRecvInfo */
struct vmci_datagram_snd_rcv_info {
u64 addr;
u32 len;
s32 result;
};
/* Datagram API for non-public use. */
int vmci_datagram_dispatch(u32 context_id, struct vmci_datagram *dg,
bool from_guest);
int vmci_datagram_invoke_guest_handler(struct vmci_datagram *dg);
#endif /* _VMCI_DATAGRAM_H_ */
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