1685a6bf8SThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-only */ 2d021c344SAndy King /* 3d021c344SAndy King * VMware vSockets Driver 4d021c344SAndy King * 5d021c344SAndy King * Copyright (C) 2013 VMware, Inc. All rights reserved. 6d021c344SAndy King */ 7d021c344SAndy King 8d021c344SAndy King #ifndef _VMCI_TRANSPORT_H_ 9d021c344SAndy King #define _VMCI_TRANSPORT_H_ 10d021c344SAndy King 11d021c344SAndy King #include <linux/vmw_vmci_defs.h> 12d021c344SAndy King #include <linux/vmw_vmci_api.h> 13d021c344SAndy King 1482a54d0eSAsias He #include <net/vsock_addr.h> 1582a54d0eSAsias He #include <net/af_vsock.h> 16d021c344SAndy King 17d021c344SAndy King /* If the packet format changes in a release then this should change too. */ 18d021c344SAndy King #define VMCI_TRANSPORT_PACKET_VERSION 1 19d021c344SAndy King 20d021c344SAndy King /* The resource ID on which control packets are sent. */ 21d021c344SAndy King #define VMCI_TRANSPORT_PACKET_RID 1 22d021c344SAndy King 232a89f924SReilly Grant /* The resource ID on which control packets are sent to the hypervisor. */ 242a89f924SReilly Grant #define VMCI_TRANSPORT_HYPERVISOR_PACKET_RID 15 252a89f924SReilly Grant 26d021c344SAndy King #define VSOCK_PROTO_INVALID 0 27d021c344SAndy King #define VSOCK_PROTO_PKT_ON_NOTIFY (1 << 0) 28d021c344SAndy King #define VSOCK_PROTO_ALL_SUPPORTED (VSOCK_PROTO_PKT_ON_NOTIFY) 29d021c344SAndy King 30d021c344SAndy King #define vmci_trans(_vsk) ((struct vmci_transport *)((_vsk)->trans)) 31d021c344SAndy King 32d021c344SAndy King enum vmci_transport_packet_type { 33d021c344SAndy King VMCI_TRANSPORT_PACKET_TYPE_INVALID = 0, 34d021c344SAndy King VMCI_TRANSPORT_PACKET_TYPE_REQUEST, 35d021c344SAndy King VMCI_TRANSPORT_PACKET_TYPE_NEGOTIATE, 36d021c344SAndy King VMCI_TRANSPORT_PACKET_TYPE_OFFER, 37d021c344SAndy King VMCI_TRANSPORT_PACKET_TYPE_ATTACH, 38d021c344SAndy King VMCI_TRANSPORT_PACKET_TYPE_WROTE, 39d021c344SAndy King VMCI_TRANSPORT_PACKET_TYPE_READ, 40d021c344SAndy King VMCI_TRANSPORT_PACKET_TYPE_RST, 41d021c344SAndy King VMCI_TRANSPORT_PACKET_TYPE_SHUTDOWN, 42d021c344SAndy King VMCI_TRANSPORT_PACKET_TYPE_WAITING_WRITE, 43d021c344SAndy King VMCI_TRANSPORT_PACKET_TYPE_WAITING_READ, 44d021c344SAndy King VMCI_TRANSPORT_PACKET_TYPE_REQUEST2, 45d021c344SAndy King VMCI_TRANSPORT_PACKET_TYPE_NEGOTIATE2, 46d021c344SAndy King VMCI_TRANSPORT_PACKET_TYPE_MAX 47d021c344SAndy King }; 48d021c344SAndy King 49d021c344SAndy King struct vmci_transport_waiting_info { 50d021c344SAndy King u64 generation; 51d021c344SAndy King u64 offset; 52d021c344SAndy King }; 53d021c344SAndy King 54d021c344SAndy King /* Control packet type for STREAM sockets. DGRAMs have no control packets nor 55d021c344SAndy King * special packet header for data packets, they are just raw VMCI DGRAM 56d021c344SAndy King * messages. For STREAMs, control packets are sent over the control channel 57d021c344SAndy King * while data is written and read directly from queue pairs with no packet 58d021c344SAndy King * format. 59d021c344SAndy King */ 60d021c344SAndy King struct vmci_transport_packet { 61d021c344SAndy King struct vmci_datagram dg; 62d021c344SAndy King u8 version; 63d021c344SAndy King u8 type; 64d021c344SAndy King u16 proto; 65d021c344SAndy King u32 src_port; 66d021c344SAndy King u32 dst_port; 67d021c344SAndy King u32 _reserved2; 68d021c344SAndy King union { 69d021c344SAndy King u64 size; 70d021c344SAndy King u64 mode; 71d021c344SAndy King struct vmci_handle handle; 72d021c344SAndy King struct vmci_transport_waiting_info wait; 73d021c344SAndy King } u; 74d021c344SAndy King }; 75d021c344SAndy King 76d021c344SAndy King struct vmci_transport_notify_pkt { 77d021c344SAndy King u64 write_notify_window; 78d021c344SAndy King u64 write_notify_min_window; 79d021c344SAndy King bool peer_waiting_read; 80d021c344SAndy King bool peer_waiting_write; 81d021c344SAndy King bool peer_waiting_write_detected; 82d021c344SAndy King bool sent_waiting_read; 83d021c344SAndy King bool sent_waiting_write; 84d021c344SAndy King struct vmci_transport_waiting_info peer_waiting_read_info; 85d021c344SAndy King struct vmci_transport_waiting_info peer_waiting_write_info; 86d021c344SAndy King u64 produce_q_generation; 87d021c344SAndy King u64 consume_q_generation; 88d021c344SAndy King }; 89d021c344SAndy King 90d021c344SAndy King struct vmci_transport_notify_pkt_q_state { 91d021c344SAndy King u64 write_notify_window; 92d021c344SAndy King u64 write_notify_min_window; 93d021c344SAndy King bool peer_waiting_write; 94d021c344SAndy King bool peer_waiting_write_detected; 95d021c344SAndy King }; 96d021c344SAndy King 97d021c344SAndy King union vmci_transport_notify { 98d021c344SAndy King struct vmci_transport_notify_pkt pkt; 99d021c344SAndy King struct vmci_transport_notify_pkt_q_state pkt_q_state; 100d021c344SAndy King }; 101d021c344SAndy King 102d021c344SAndy King /* Our transport-specific data. */ 103d021c344SAndy King struct vmci_transport { 104d021c344SAndy King /* For DGRAMs. */ 105d021c344SAndy King struct vmci_handle dg_handle; 106d021c344SAndy King /* For STREAMs. */ 107d021c344SAndy King struct vmci_handle qp_handle; 108d021c344SAndy King struct vmci_qp *qpair; 109d021c344SAndy King u64 produce_size; 110d021c344SAndy King u64 consume_size; 111d021c344SAndy King u32 detach_sub_id; 112d021c344SAndy King union vmci_transport_notify notify; 1133b22dae3SJulia Lawall const struct vmci_transport_notify_ops *notify_ops; 1144ef7ea91SJorgen Hansen struct list_head elem; 1154ef7ea91SJorgen Hansen struct sock *sk; 1164ef7ea91SJorgen Hansen spinlock_t lock; /* protects sk. */ 117d021c344SAndy King }; 118d021c344SAndy King 119d021c344SAndy King int vmci_transport_send_wrote_bh(struct sockaddr_vm *dst, 120d021c344SAndy King struct sockaddr_vm *src); 121d021c344SAndy King int vmci_transport_send_read_bh(struct sockaddr_vm *dst, 122d021c344SAndy King struct sockaddr_vm *src); 123d021c344SAndy King int vmci_transport_send_wrote(struct sock *sk); 124d021c344SAndy King int vmci_transport_send_read(struct sock *sk); 125d021c344SAndy King int vmci_transport_send_waiting_write(struct sock *sk, 126d021c344SAndy King struct vmci_transport_waiting_info *wait); 127d021c344SAndy King int vmci_transport_send_waiting_read(struct sock *sk, 128d021c344SAndy King struct vmci_transport_waiting_info *wait); 129d021c344SAndy King 130d021c344SAndy King #endif 131