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