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Drivers: hv: Extend/modify vmbus_channel_offer_channel for win7 and beyond

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The "offfer" message sent by the host has been extended in win7 (ws2008 R2).
Add/modify state to reflect this extension. All these changes are backward
compatible.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
K. Y. Srinivasan 2012-12-01 06:46:40 -08:00 committed by Greg Kroah-Hartman
parent 2416603ef1
commit 29423b7e51
1 changed files with 31 additions and 5 deletions
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36
include/linux/hyperv.h
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@ -440,9 +440,13 @@ hv_get_ringbuffer_availbytes(struct hv_ring_buffer_info *rbi,
struct vmbus_channel_offer {
uuid_le if_type;
uuid_le if_instance;
u64 int_latency; /* in 100ns units */
u32 if_revision;
u32 server_ctx_size; /* in bytes */
/*
* These two fields are not currently used.
*/
u64 reserved1;
u64 reserved2;
u16 chn_flags;
u16 mmio_megabytes; /* in bytes * 1024 * 1024 */
@ -464,7 +468,11 @@ struct vmbus_channel_offer {
unsigned char user_def[MAX_PIPE_USER_DEFINED_BYTES];
} pipe;
} u;
u32 padding;
/*
* The sub_channel_index is defined in win8.
*/
u16 sub_channel_index;
u16 reserved3;
} __packed;
/* Server Flags */
@ -660,7 +668,25 @@ struct vmbus_channel_offer_channel {
struct vmbus_channel_offer offer;
u32 child_relid;
u8 monitorid;
u8 monitor_allocated;
/*
* win7 and beyond splits this field into a bit field.
*/
u8 monitor_allocated:1;
u8 reserved:7;
/*
* These are new fields added in win7 and later.
* Do not access these fields without checking the
* negotiated protocol.
*
* If "is_dedicated_interrupt" is set, we must not set the
* associated bit in the channel bitmap while sending the
* interrupt to the host.
*
* connection_id is to be used in signaling the host.
*/
u16 is_dedicated_interrupt:1;
u16 reserved1:15;
u32 connection_id;
} __packed;
/* Rescind Offer parameters */