Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / net / vmw_vsock / vmci_transport.h

diff --git a/kernel/net/vmw_vsock/vmci_transport.h b/kernel/net/vmw_vsock/vmci_transport.h
new file mode 100644 (file)
index 0000000..ce6c962
--- /dev/null
+++ b/kernel/net/vmw_vsock/vmci_transport.h
@@ -0,0 +1,142 @@
+/*
+ * VMware vSockets Driver
+ *
+ * Copyright (C) 2013 VMware, Inc. 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 as published by the Free
+ * Software Foundation version 2 and no later version.
+ *
+ * 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 _VMCI_TRANSPORT_H_
+#define _VMCI_TRANSPORT_H_
+
+#include <linux/vmw_vmci_defs.h>
+#include <linux/vmw_vmci_api.h>
+
+#include <net/vsock_addr.h>
+#include <net/af_vsock.h>
+
+/* If the packet format changes in a release then this should change too. */
+#define VMCI_TRANSPORT_PACKET_VERSION 1
+
+/* The resource ID on which control packets are sent. */
+#define VMCI_TRANSPORT_PACKET_RID 1
+
+/* The resource ID on which control packets are sent to the hypervisor. */
+#define VMCI_TRANSPORT_HYPERVISOR_PACKET_RID 15
+
+#define VSOCK_PROTO_INVALID        0
+#define VSOCK_PROTO_PKT_ON_NOTIFY (1 << 0)
+#define VSOCK_PROTO_ALL_SUPPORTED (VSOCK_PROTO_PKT_ON_NOTIFY)
+
+#define vmci_trans(_vsk) ((struct vmci_transport *)((_vsk)->trans))
+
+enum vmci_transport_packet_type {
+       VMCI_TRANSPORT_PACKET_TYPE_INVALID = 0,
+       VMCI_TRANSPORT_PACKET_TYPE_REQUEST,
+       VMCI_TRANSPORT_PACKET_TYPE_NEGOTIATE,
+       VMCI_TRANSPORT_PACKET_TYPE_OFFER,
+       VMCI_TRANSPORT_PACKET_TYPE_ATTACH,
+       VMCI_TRANSPORT_PACKET_TYPE_WROTE,
+       VMCI_TRANSPORT_PACKET_TYPE_READ,
+       VMCI_TRANSPORT_PACKET_TYPE_RST,
+       VMCI_TRANSPORT_PACKET_TYPE_SHUTDOWN,
+       VMCI_TRANSPORT_PACKET_TYPE_WAITING_WRITE,
+       VMCI_TRANSPORT_PACKET_TYPE_WAITING_READ,
+       VMCI_TRANSPORT_PACKET_TYPE_REQUEST2,
+       VMCI_TRANSPORT_PACKET_TYPE_NEGOTIATE2,
+       VMCI_TRANSPORT_PACKET_TYPE_MAX
+};
+
+struct vmci_transport_waiting_info {
+       u64 generation;
+       u64 offset;
+};
+
+/* Control packet type for STREAM sockets.  DGRAMs have no control packets nor
+ * special packet header for data packets, they are just raw VMCI DGRAM
+ * messages.  For STREAMs, control packets are sent over the control channel
+ * while data is written and read directly from queue pairs with no packet
+ * format.
+ */
+struct vmci_transport_packet {
+       struct vmci_datagram dg;
+       u8 version;
+       u8 type;
+       u16 proto;
+       u32 src_port;
+       u32 dst_port;
+       u32 _reserved2;
+       union {
+               u64 size;
+               u64 mode;
+               struct vmci_handle handle;
+               struct vmci_transport_waiting_info wait;
+       } u;
+};
+
+struct vmci_transport_notify_pkt {
+       u64 write_notify_window;
+       u64 write_notify_min_window;
+       bool peer_waiting_read;
+       bool peer_waiting_write;
+       bool peer_waiting_write_detected;
+       bool sent_waiting_read;
+       bool sent_waiting_write;
+       struct vmci_transport_waiting_info peer_waiting_read_info;
+       struct vmci_transport_waiting_info peer_waiting_write_info;
+       u64 produce_q_generation;
+       u64 consume_q_generation;
+};
+
+struct vmci_transport_notify_pkt_q_state {
+       u64 write_notify_window;
+       u64 write_notify_min_window;
+       bool peer_waiting_write;
+       bool peer_waiting_write_detected;
+};
+
+union vmci_transport_notify {
+       struct vmci_transport_notify_pkt pkt;
+       struct vmci_transport_notify_pkt_q_state pkt_q_state;
+};
+
+/* Our transport-specific data. */
+struct vmci_transport {
+       /* For DGRAMs. */
+       struct vmci_handle dg_handle;
+       /* For STREAMs. */
+       struct vmci_handle qp_handle;
+       struct vmci_qp *qpair;
+       u64 produce_size;
+       u64 consume_size;
+       u64 queue_pair_size;
+       u64 queue_pair_min_size;
+       u64 queue_pair_max_size;
+       u32 attach_sub_id;
+       u32 detach_sub_id;
+       union vmci_transport_notify notify;
+       struct vmci_transport_notify_ops *notify_ops;
+};
+
+int vmci_transport_register(void);
+void vmci_transport_unregister(void);
+
+int vmci_transport_send_wrote_bh(struct sockaddr_vm *dst,
+                                struct sockaddr_vm *src);
+int vmci_transport_send_read_bh(struct sockaddr_vm *dst,
+                               struct sockaddr_vm *src);
+int vmci_transport_send_wrote(struct sock *sk);
+int vmci_transport_send_read(struct sock *sk);
+int vmci_transport_send_waiting_write(struct sock *sk,
+                                     struct vmci_transport_waiting_info *wait);
+int vmci_transport_send_waiting_read(struct sock *sk,
+                                    struct vmci_transport_waiting_info *wait);
+
+#endif