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gerrit-public.fairphone.software / kernel / msm-4.19 / a0409c9ae17827b9e5a7ad5e4bc85eb437efab07 / . / net / vmw_vsock / vmci_transport.h
blob: 1bf991803ec0ddb0d7147f09f832effcd7670d75 [file] [log] [blame]
Andy Kingd021c342013-02-06 14:23:56 +0000[diff] [blame]1/*
2 * VMware vSockets Driver
3 *
4 * Copyright (C) 2013 VMware, Inc. All rights reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the Free
8 * Software Foundation version 2 and no later version.
9 *
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 */
15
16#ifndef _VMCI_TRANSPORT_H_
17#define _VMCI_TRANSPORT_H_
18
19#include <linux/vmw_vmci_defs.h>
20#include <linux/vmw_vmci_api.h>
21
22#include "vsock_addr.h"
23#include "af_vsock.h"
24
25/* If the packet format changes in a release then this should change too. */
26#define VMCI_TRANSPORT_PACKET_VERSION 1
27
28/* The resource ID on which control packets are sent. */
29#define VMCI_TRANSPORT_PACKET_RID 1
30
31#define VSOCK_PROTO_INVALID 0
32#define VSOCK_PROTO_PKT_ON_NOTIFY (1 << 0)
33#define VSOCK_PROTO_ALL_SUPPORTED (VSOCK_PROTO_PKT_ON_NOTIFY)
34
35#define vmci_trans(_vsk) ((struct vmci_transport *)((_vsk)->trans))
36
37enum vmci_transport_packet_type {
38 VMCI_TRANSPORT_PACKET_TYPE_INVALID = 0,
39 VMCI_TRANSPORT_PACKET_TYPE_REQUEST,
40 VMCI_TRANSPORT_PACKET_TYPE_NEGOTIATE,
41 VMCI_TRANSPORT_PACKET_TYPE_OFFER,
42 VMCI_TRANSPORT_PACKET_TYPE_ATTACH,
43 VMCI_TRANSPORT_PACKET_TYPE_WROTE,
44 VMCI_TRANSPORT_PACKET_TYPE_READ,
45 VMCI_TRANSPORT_PACKET_TYPE_RST,
46 VMCI_TRANSPORT_PACKET_TYPE_SHUTDOWN,
47 VMCI_TRANSPORT_PACKET_TYPE_WAITING_WRITE,
48 VMCI_TRANSPORT_PACKET_TYPE_WAITING_READ,
49 VMCI_TRANSPORT_PACKET_TYPE_REQUEST2,
50 VMCI_TRANSPORT_PACKET_TYPE_NEGOTIATE2,
51 VMCI_TRANSPORT_PACKET_TYPE_MAX
52};
53
54struct vmci_transport_waiting_info {
55 u64 generation;
56 u64 offset;
57};
58
59/* Control packet type for STREAM sockets. DGRAMs have no control packets nor
60 * special packet header for data packets, they are just raw VMCI DGRAM
61 * messages. For STREAMs, control packets are sent over the control channel
62 * while data is written and read directly from queue pairs with no packet
63 * format.
64 */
65struct vmci_transport_packet {
66 struct vmci_datagram dg;
67 u8 version;
68 u8 type;
69 u16 proto;
70 u32 src_port;
71 u32 dst_port;
72 u32 _reserved2;
73 union {
74 u64 size;
75 u64 mode;
76 struct vmci_handle handle;
77 struct vmci_transport_waiting_info wait;
78 } u;
79};
80
81struct vmci_transport_notify_pkt {
82 u64 write_notify_window;
83 u64 write_notify_min_window;
84 bool peer_waiting_read;
85 bool peer_waiting_write;
86 bool peer_waiting_write_detected;
87 bool sent_waiting_read;
88 bool sent_waiting_write;
89 struct vmci_transport_waiting_info peer_waiting_read_info;
90 struct vmci_transport_waiting_info peer_waiting_write_info;
91 u64 produce_q_generation;
92 u64 consume_q_generation;
93};
94
95struct vmci_transport_notify_pkt_q_state {
96 u64 write_notify_window;
97 u64 write_notify_min_window;
98 bool peer_waiting_write;
99 bool peer_waiting_write_detected;
100};
101
102union vmci_transport_notify {
103 struct vmci_transport_notify_pkt pkt;
104 struct vmci_transport_notify_pkt_q_state pkt_q_state;
105};
106
107/* Our transport-specific data. */
108struct vmci_transport {
109 /* For DGRAMs. */
110 struct vmci_handle dg_handle;
111 /* For STREAMs. */
112 struct vmci_handle qp_handle;
113 struct vmci_qp *qpair;
114 u64 produce_size;
115 u64 consume_size;
116 u64 queue_pair_size;
117 u64 queue_pair_min_size;
118 u64 queue_pair_max_size;
119 u32 attach_sub_id;
120 u32 detach_sub_id;
121 union vmci_transport_notify notify;
122 struct vmci_transport_notify_ops *notify_ops;
123};
124
125int vmci_transport_register(void);
126void vmci_transport_unregister(void);
127
128int vmci_transport_send_wrote_bh(struct sockaddr_vm *dst,
129 struct sockaddr_vm *src);
130int vmci_transport_send_read_bh(struct sockaddr_vm *dst,
131 struct sockaddr_vm *src);
132int vmci_transport_send_wrote(struct sock *sk);
133int vmci_transport_send_read(struct sock *sk);
134int vmci_transport_send_waiting_write(struct sock *sk,
135 struct vmci_transport_waiting_info *wait);
136int vmci_transport_send_waiting_read(struct sock *sk,
137 struct vmci_transport_waiting_info *wait);
138
139#endif