11590Srgrimes/* SPDX-License-Identifier: GPL-2.0-only */ 21590Srgrimes/* 31590Srgrimes * VMware VMCI Driver 41590Srgrimes * 51590Srgrimes * Copyright (C) 2012 VMware, Inc. All rights reserved. 61590Srgrimes */ 71590Srgrimes 81590Srgrimes#ifndef _VMCI_DATAGRAM_H_ 91590Srgrimes#define _VMCI_DATAGRAM_H_ 101590Srgrimes 111590Srgrimes#include <linux/types.h> 121590Srgrimes#include <linux/list.h> 131590Srgrimes 141590Srgrimes#include "vmci_context.h" 151590Srgrimes 161590Srgrimes#define VMCI_MAX_DELAYED_DG_HOST_QUEUE_SIZE 256 171590Srgrimes 181590Srgrimes/* 191590Srgrimes * The struct vmci_datagram_queue_entry is a queue header for the in-kernel VMCI 201590Srgrimes * datagram queues. It is allocated in non-paged memory, as the 211590Srgrimes * content is accessed while holding a spinlock. The pending datagram 221590Srgrimes * itself may be allocated from paged memory. We shadow the size of 231590Srgrimes * the datagram in the non-paged queue entry as this size is used 241590Srgrimes * while holding the same spinlock as above. 251590Srgrimes */ 261590Srgrimesstruct vmci_datagram_queue_entry { 271590Srgrimes struct list_head list_item; /* For queuing. */ 281590Srgrimes size_t dg_size; /* Size of datagram. */ 291590Srgrimes struct vmci_datagram *dg; /* Pending datagram. */ 3087710Smarkm}; 3187710Smarkm 3287710Smarkm/* VMCIDatagramSendRecvInfo */ 3387710Smarkmstruct vmci_datagram_snd_rcv_info { 341590Srgrimes u64 addr; 3587710Smarkm u32 len; 3632503Scharnier s32 result; 371590Srgrimes}; 3832503Scharnier 3932503Scharnier/* Datagram API for non-public use. */ 4014443Sjoergint vmci_datagram_dispatch(u32 context_id, struct vmci_datagram *dg, 41200418Sdelphij bool from_guest); 4287710Smarkmint vmci_datagram_invoke_guest_handler(struct vmci_datagram *dg); 4314443Sjoerg 441590Srgrimes#endif /* _VMCI_DATAGRAM_H_ */ 451590Srgrimes