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/* Copyright (c) 2016-2020, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef HABMM_H
#define HABMM_H
#include "linux/habmmid.h"
#define HAB_API_VER_DEF(_MAJOR_, _MINOR_) \
((_MAJOR_&0xFF)<<16 | (_MINOR_&0xFFF))
#define HAB_API_VER HAB_API_VER_DEF(1, 0)
#include <linux/types.h>
/* habmm_socket_open
*
* Description:
*
* Establish a communication channel between Virtual Machines. Blocks
* until the connection is established between sender and receiver.
* Client can call this APImultiple times with the same name to connect
* to the same communication channel, the function returns a different context
* for every open for proper resource allocation and client identification.
*
* Params:
* out handle - An opaque handle associated with a successful virtual channel
* creation in MM_ID - multimedia ID used to allocate the physical channels to
* service all the virtual channels created through this open
* in timeout - timeout value specified by the client to avoid forever block
* in flags - future extension
*
* Return:
* status (success/failure/timeout)
*
*/
/* single FE-BE connection multi-to-multi point to point matching (default) */
#define HABMM_SOCKET_OPEN_FLAGS_SINGLE_BE_SINGLE_FE 0x00000000
/* one BE for one domU */
#define HABMM_SOCKET_OPEN_FLAGS_SINGLE_BE_SINGLE_DOMU 0x00000001
/* one BE for all the domUs */
#define HABMM_SOCKET_OPEN_FLAGS_SINGLE_BE_MULTI_DOMUS 0x00000002
int32_t habmm_socket_open(int32_t *handle, uint32_t mm_ip_id,
uint32_t timeout, uint32_t flags);
/* habmm_socket_close
*
* Description:
*
* Tear down the virtual channel that was established through habmm_socket_open
* and release all resources associated with it.
*
* Params:
*
* in handle - handle to the virtual channel created by habmm_socket_open
*
* Return:
* status - (success/failure)
*
*
*/
int32_t habmm_socket_close(int32_t handle);
/* habmm_socket_send
*
* Description:
*
* Send data over the virtual channel
*
* Params:
*
* in handle - handle created by habmm_socket_open
* in src_buff - data to be send across the virtual channel
* inout size_bytes - size of the data to be send. Either the whole packet is
* sent or not
* in flags - future extension
*
* Return:
* status (success/fail/disconnected)
*
*/
/* Non-blocking mode: function will return immediately with HAB_AGAIN
* if the send operation cannot be completed without blocking.
*/
#define HABMM_SOCKET_SEND_FLAGS_NON_BLOCKING 0x00000001
/* Collect cross-VM stats: client provides stat-buffer large enough to allow 2
* sets of a 2-uint64_t pair to collect seconds and nano-seconds at the
* beginning of the stat-buffer. Stats are collected when the stat-buffer leaves
* VM1, then enters VM2
*/
#define HABMM_SOCKET_SEND_FLAGS_XING_VM_STAT 0x00000002
/* start to measure cross-vm schedule latency: VM1 send msg with this flag
* to VM2 to kick off the measurement. In the hab driver level, the VM1 hab
* driver shall record the time of schdule out with mpm_timer, and buffer
* it for later usage. The VM2 hab driver shall record the time of schedule
* in with mpm_timer and pass it to "habtest" application.
*/
#define HABMM_SOCKET_XVM_SCHE_TEST 0x00000004
/* VM2 responds this message to VM1 for HABMM_SOCKET_XVM_SCHE_TEST.
* In the hab driver level, the VM2 hab driver shall record the time of schedule
* out with mpm_timer, and buffer it for later usage; the VM1 hab driver
* shall record the time of schedule in with mpm_timer and pass it to "habtest"
* application.
*/
#define HABMM_SOCKET_XVM_SCHE_TEST_ACK 0x00000008
/* VM1 sends this message to VM2 asking for collect all the mpm_timer values
* to calculate the latency of schduling between VM1 and VM2. In the hab driver
* level, the VM1 hab driver shall save the previous restored schduling out
* time to the message buffer
*/
#define HABMM_SOCKET_XVM_SCHE_RESULT_REQ 0x00000010
/* VM2 responds this message to VM2 for HABMM_SOCKET_XVM_SCHE_RESULT_REQ.
* In the habtest application level, VM2 shall save the previous restored
* scheduling in time into message buffer, in the hab driver level, VM2
* shall save the previous restored scheduling out time to the message
* buffer.
*/
#define HABMM_SOCKET_XVM_SCHE_RESULT_RSP 0x00000020
struct habmm_xing_vm_stat {
uint64_t tx_sec;
uint64_t tx_usec;
uint64_t rx_sec;
uint64_t rx_usec;
};
int32_t habmm_socket_send(int32_t handle, void *src_buff, uint32_t size_bytes,
uint32_t flags);
/* habmm_socket_recv
*
* Description:
*
* Receive data over the virtual channel created by habmm_socket_open.
* Blocking until actual data is received or timeout value expires
*
* Params:
*
* in handle - communication channel created by habmm_socket_open
* inout dst_buff - buffer pointer to store received data
* inout size_bytes - size of the dst_buff. returned value shows the actual
* bytes received.
* in timeout - timeout value specified by the client to avoid forever block
* in flags - future extension
*
*
* Return:
* status (success/failure/timeout/disconnected)
*
*/
/* Non-blocking mode: function will return immediately if there is no data
* available. Supported only for kernel clients.
*/
#define HABMM_SOCKET_RECV_FLAGS_NON_BLOCKING 0x00000001
/* In the blocking mode, this flag is used to indicate it is an
* uninterruptbile blocking call.
*/
#define HABMM_SOCKET_RECV_FLAGS_UNINTERRUPTIBLE 0x00000002
int32_t habmm_socket_recv(int32_t handle, void *dst_buff, uint32_t *size_bytes,
uint32_t timeout, uint32_t flags);
/* habmm_socket_sendto
*
* Description:
*
* This is for backend only. Send data over the virtual channel to remote
* frontend virtual channel for multi-FEs-to-single-BE model when
* the BE virtual channel is created using
* HABMM_SOCKET_OPEN_FLAGS_SINGLE_BE_SINGLE_DOMU or
* HABMM_SOCKET_OPEN_FLAGS_SINGLE_BE_MULTI_DOMUS
*
* Params:
*
* in handle - handle created by habmm_socket_open
* in src_buff - data to be send across the virtual channel
* inout size_bytes - size of the data to be send. The packet is fully sent on
* success,or not sent at all upon any failure
* in remote_handle - the destination of this send using remote FE's virtual
* channel handle
* in flags - future extension
*
* Return:
* status (success/fail/disconnected)
*/
int32_t habmm_socket_sendto(int32_t handle, void *src_buff, uint32_t size_bytes,
int32_t remote_handle, uint32_t flags);
/* habmm_socket_recvfrom
*
* Description:
*
* Receive data over the virtual channel created by habmm_socket_open.
* Returned is the remote FE's virtual channel handle to be used for sendto.
* Blocking until actual data is received or timeout value expires. This is for
* BE running in multi-FEs-to-single-BE model when the BE virtual channel is
* created using HABMM_SOCKET_OPEN_FLAGS_SINGLE_BE_SINGLE_DOMU or
* HABMM_SOCKET_OPEN_FLAGS_SINGLE_BE_MULTI_DOMUS.
*
* Params:
*
* in handle - communication channel created by habmm_socket_open
* inout dst_buff - buffer pointer to store received data
* inout size_bytes - size of the dst_buff. returned value shows the actual
* bytes received.
* in timeout - timeout value specified by the client to avoid forever block
* in remote_handle - the FE who sent this message through the
* connected virtual channel to BE.
* in flags - future extension
*
* Return:
* status (success/failure/timeout/disconnected)
*
*/
int32_t habmm_socket_recvfrom(int32_t handle, void *dst_buff,
uint32_t *size_bytes, uint32_t timeout,
int32_t *remote_handle, uint32_t flags);
/* exporting memory type DMA : This is platform dependent for user mode. If it
* does exist, HAB needs to use DMA method to retrieve the memory for exporting.
* If it does not exist, this flag is ignored.
*/
#define HABMM_EXP_MEM_TYPE_DMA 0x00000001
/*
* this flag is used for export from dma_buf fd or import to dma_buf fd
*/
#define HABMM_EXPIMP_FLAGS_FD 0x00010000
#define HABMM_EXPIMP_FLAGS_DMABUF 0x00020000
#define HAB_MAX_EXPORT_SIZE 0x8000000
/*
* Description:
*
* Prepare the sharing of the buffer on the exporter side. The returned
* reference ID needs to be sent to importer separately.
* During sending the HAB will attach the actual exporting buffer information.
* The exporting is per process space.
*
* Params:
*
* in handle - communication channel created by habmm_socket_open
* in buff_to_share - buffer to be exported
* in size_bytes - size of the exporting buffer in bytes
* out export_id - to be returned by this call upon success
* in flags - future extension
*
* Return:
* status (success/failure)
*
*/
int32_t habmm_export(int32_t handle, void *buff_to_share, uint32_t size_bytes,
uint32_t *export_id, uint32_t flags);
/*
* Description:
*
* Free any allocated resource associated with this export IDin on local side.
* Params:
*
* in handle - communication channel created by habmm_socket_open
* in export_id - all resource allocated with export_id are to be freed
* in flags - future extension
*
* Return:
* status (success/failure)
*
*/
int32_t habmm_unexport(int32_t handle, uint32_t export_id, uint32_t flags);
/*
* Description:
*
* Import the exporter's shared reference ID.
* The importing is per process space.
*
* Params:
*
* in handle - communication channel created by habmm_socket_open
* out buff_shared - buffer to be imported. returned upon success
* in size_bytes - size of the imported buffer in bytes. It should match the
* original exported buffer size
* in export_id - received when exporter sent its exporting ID through
* habmm_socket_send() previously
* in flags - future extension
*
* Return:
* status (success/failure)
*
*/
/* Non-blocking mode: function will return immediately if there is no data
* available. Supported only for kernel clients.
*/
#define HABMM_IMPORT_FLAGS_CACHED 0x00000001
int32_t habmm_import(int32_t handle, void **buff_shared, uint32_t size_bytes,
uint32_t export_id, uint32_t flags);
/*
* Description:
*
* Release any resource associated with the export ID on the importer side.
*
* Params:
*
* in handle - communication channel created by habmm_socket_open
* in export_id - received when exporter sent its exporting ID through
* habmm_socket_send() previously
* in buff_shared - received from habmm_import() together with export_id
* in flags - future extension
*
* Return:
* status (success/failure)
*
*/
int32_t habmm_unimport(int32_t handle, uint32_t export_id, void *buff_shared,
uint32_t flags);
/*
* Description:
*
* Query various information of the opened hab socket.
*
* Params:
*
* in handle - communication channel created by habmm_socket_open
* in habmm_socket_info - retrieve socket information regarding local and remote
* VMs
* in flags - future extension
*
* Return:
* status (success/failure)
*
*/
#define VMNAME_SIZE 12
struct hab_socket_info {
int32_t vmid_remote; /* habmm's vmid */
int32_t vmid_local;
/* name from hypervisor framework if available */
char vmname_remote[VMNAME_SIZE];
char vmname_local[VMNAME_SIZE];
};
int32_t habmm_socket_query(int32_t handle, struct hab_socket_info *info,
uint32_t flags);
#endif /* HABMM_H */