diff options
Diffstat (limited to 'drivers/staging/hv/vmbus_channel_interface.h')
| -rw-r--r-- | drivers/staging/hv/vmbus_channel_interface.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/drivers/staging/hv/vmbus_channel_interface.h b/drivers/staging/hv/vmbus_channel_interface.h new file mode 100644 index 0000000..2674282 --- /dev/null +++ b/drivers/staging/hv/vmbus_channel_interface.h @@ -0,0 +1,89 @@ +/* + * + * Copyright (c) 2009, Microsoft Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., 59 Temple + * Place - Suite 330, Boston, MA 02111-1307 USA. + * + * Authors: + * Haiyang Zhang <haiyangz@microsoft.com> + * Hank Janssen <hjanssen@microsoft.com> + * + */ + +#ifndef __VMBUSCHANNELINTERFACE_H +#define __VMBUSCHANNELINTERFACE_H + +/* + * A revision number of vmbus that is used for ensuring both ends on a + * partition are using compatible versions. + */ +#define VMBUS_REVISION_NUMBER 13 + +/* Make maximum size of pipe payload of 16K */ +#define MAX_PIPE_DATA_PAYLOAD (sizeof(u8) * 16384) + +/* Define PipeMode values. */ +#define VMBUS_PIPE_TYPE_BYTE 0x00000000 +#define VMBUS_PIPE_TYPE_MESSAGE 0x00000004 + +/* The size of the user defined data buffer for non-pipe offers. */ +#define MAX_USER_DEFINED_BYTES 120 + +/* The size of the user defined data buffer for pipe offers. */ +#define MAX_PIPE_USER_DEFINED_BYTES 116 + +/* + * At the center of the Channel Management library is the Channel Offer. This + * struct contains the fundamental information about an offer. + */ +struct vmbus_channel_offer { + struct hv_guid InterfaceType; + struct hv_guid InterfaceInstance; + u64 InterruptLatencyIn100nsUnits; + u32 InterfaceRevision; + u32 ServerContextAreaSize; /* in bytes */ + u16 ChannelFlags; + u16 MmioMegabytes; /* in bytes * 1024 * 1024 */ + + union { + /* Non-pipes: The user has MAX_USER_DEFINED_BYTES bytes. */ + struct { + unsigned char UserDefined[MAX_USER_DEFINED_BYTES]; + } Standard; + + /* + * Pipes: + * The following sructure is an integrated pipe protocol, which + * is implemented on top of standard user-defined data. Pipe + * clients have MAX_PIPE_USER_DEFINED_BYTES left for their own + * use. + */ + struct { + u32 PipeMode; + unsigned char UserDefined[MAX_PIPE_USER_DEFINED_BYTES]; + } Pipe; + } u; + u32 Padding; +} __attribute__((packed)); + +/* Server Flags */ +#define VMBUS_CHANNEL_ENUMERATE_DEVICE_INTERFACE 1 +#define VMBUS_CHANNEL_SERVER_SUPPORTS_TRANSFER_PAGES 2 +#define VMBUS_CHANNEL_SERVER_SUPPORTS_GPADLS 4 +#define VMBUS_CHANNEL_NAMED_PIPE_MODE 0x10 +#define VMBUS_CHANNEL_LOOPBACK_OFFER 0x100 +#define VMBUS_CHANNEL_PARENT_OFFER 0x200 +#define VMBUS_CHANNEL_REQUEST_MONITORED_NOTIFICATION 0x400 + +#endif |
