projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| d021c344 AK |
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 | ||
| 2a89f924 RG |
31 | /* The resource ID on which control packets are sent to the hypervisor. */ |
| 32 | #define VMCI_TRANSPORT_HYPERVISOR_PACKET_RID 15 | |
| 33 | ||
| d021c344 AK |
34 | #define VSOCK_PROTO_INVALID 0 |
| 35 | #define VSOCK_PROTO_PKT_ON_NOTIFY (1 << 0) | |
| 36 | #define VSOCK_PROTO_ALL_SUPPORTED (VSOCK_PROTO_PKT_ON_NOTIFY) | |
| 37 | ||
| 38 | #define vmci_trans(_vsk) ((struct vmci_transport *)((_vsk)->trans)) | |
| 39 | ||
| 40 | enum vmci_transport_packet_type { | |
| 41 | VMCI_TRANSPORT_PACKET_TYPE_INVALID = 0, | |
| 42 | VMCI_TRANSPORT_PACKET_TYPE_REQUEST, | |
| 43 | VMCI_TRANSPORT_PACKET_TYPE_NEGOTIATE, | |
| 44 | VMCI_TRANSPORT_PACKET_TYPE_OFFER, | |
| 45 | VMCI_TRANSPORT_PACKET_TYPE_ATTACH, | |
| 46 | VMCI_TRANSPORT_PACKET_TYPE_WROTE, | |
| 47 | VMCI_TRANSPORT_PACKET_TYPE_READ, | |
| 48 | VMCI_TRANSPORT_PACKET_TYPE_RST, | |
| 49 | VMCI_TRANSPORT_PACKET_TYPE_SHUTDOWN, | |
| 50 | VMCI_TRANSPORT_PACKET_TYPE_WAITING_WRITE, | |
| 51 | VMCI_TRANSPORT_PACKET_TYPE_WAITING_READ, | |
| 52 | VMCI_TRANSPORT_PACKET_TYPE_REQUEST2, | |
| 53 | VMCI_TRANSPORT_PACKET_TYPE_NEGOTIATE2, | |
| 54 | VMCI_TRANSPORT_PACKET_TYPE_MAX | |
| 55 | }; | |
| 56 | ||
| 57 | struct vmci_transport_waiting_info { | |
| 58 | u64 generation; | |
| 59 | u64 offset; | |
| 60 | }; | |
| 61 | ||
| 62 | /* Control packet type for STREAM sockets. DGRAMs have no control packets nor | |
| 63 | * special packet header for data packets, they are just raw VMCI DGRAM | |
| 64 | * messages. For STREAMs, control packets are sent over the control channel | |
| 65 | * while data is written and read directly from queue pairs with no packet | |
| 66 | * format. | |
| 67 | */ | |
| 68 | struct vmci_transport_packet { | |
| 69 | struct vmci_datagram dg; | |
| 70 | u8 version; | |
| 71 | u8 type; | |
| 72 | u16 proto; | |
| 73 | u32 src_port; | |
| 74 | u32 dst_port; | |
| 75 | u32 _reserved2; | |
| 76 | union { | |
| 77 | u64 size; | |
| 78 | u64 mode; | |
| 79 | struct vmci_handle handle; | |
| 80 | struct vmci_transport_waiting_info wait; | |
| 81 | } u; | |
| 82 | }; | |
| 83 | ||
| 84 | struct vmci_transport_notify_pkt { | |
| 85 | u64 write_notify_window; | |
| 86 | u64 write_notify_min_window; | |
| 87 | bool peer_waiting_read; | |
| 88 | bool peer_waiting_write; | |
| 89 | bool peer_waiting_write_detected; | |
| 90 | bool sent_waiting_read; | |
| 91 | bool sent_waiting_write; | |
| 92 | struct vmci_transport_waiting_info peer_waiting_read_info; | |
| 93 | struct vmci_transport_waiting_info peer_waiting_write_info; | |
| 94 | u64 produce_q_generation; | |
| 95 | u64 consume_q_generation; | |
| 96 | }; | |
| 97 | ||
| 98 | struct vmci_transport_notify_pkt_q_state { | |
| 99 | u64 write_notify_window; | |
| 100 | u64 write_notify_min_window; | |
| 101 | bool peer_waiting_write; | |
| 102 | bool peer_waiting_write_detected; | |
| 103 | }; | |
| 104 | ||
| 105 | union vmci_transport_notify { | |
| 106 | struct vmci_transport_notify_pkt pkt; | |
| 107 | struct vmci_transport_notify_pkt_q_state pkt_q_state; | |
| 108 | }; | |
| 109 | ||
| 110 | /* Our transport-specific data. */ | |
| 111 | struct vmci_transport { | |
| 112 | /* For DGRAMs. */ | |
| 113 | struct vmci_handle dg_handle; | |
| 114 | /* For STREAMs. */ | |
| 115 | struct vmci_handle qp_handle; | |
| 116 | struct vmci_qp *qpair; | |
| 117 | u64 produce_size; | |
| 118 | u64 consume_size; | |
| 119 | u64 queue_pair_size; | |
| 120 | u64 queue_pair_min_size; | |
| 121 | u64 queue_pair_max_size; | |
| 122 | u32 attach_sub_id; | |
| 123 | u32 detach_sub_id; | |
| 124 | union vmci_transport_notify notify; | |
| 125 | struct vmci_transport_notify_ops *notify_ops; | |
| 126 | }; | |
| 127 | ||
| 128 | int vmci_transport_register(void); | |
| 129 | void vmci_transport_unregister(void); | |
| 130 | ||
| 131 | int vmci_transport_send_wrote_bh(struct sockaddr_vm *dst, | |
| 132 | struct sockaddr_vm *src); | |
| 133 | int vmci_transport_send_read_bh(struct sockaddr_vm *dst, | |
| 134 | struct sockaddr_vm *src); | |
| 135 | int vmci_transport_send_wrote(struct sock *sk); | |
| 136 | int vmci_transport_send_read(struct sock *sk); | |
| 137 | int vmci_transport_send_waiting_write(struct sock *sk, | |
| 138 | struct vmci_transport_waiting_info *wait); | |
| 139 | int vmci_transport_send_waiting_read(struct sock *sk, | |
| 140 | struct vmci_transport_waiting_info *wait); | |
| 141 | ||
| 142 | #endif |