Drivers: hv: Extend/modify vmbus_channel_offer_channel for win7 and beyond
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>
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@ -440,9 +440,13 @@ hv_get_ringbuffer_availbytes(struct hv_ring_buffer_info *rbi,
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struct vmbus_channel_offer {
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uuid_le if_type;
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uuid_le if_instance;
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u64 int_latency; /* in 100ns units */
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u32 if_revision;
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u32 server_ctx_size; /* in bytes */
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/*
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* These two fields are not currently used.
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*/
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u64 reserved1;
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u64 reserved2;
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u16 chn_flags;
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u16 mmio_megabytes; /* in bytes * 1024 * 1024 */
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@ -464,7 +468,11 @@ struct vmbus_channel_offer {
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unsigned char user_def[MAX_PIPE_USER_DEFINED_BYTES];
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} pipe;
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} u;
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u32 padding;
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/*
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* The sub_channel_index is defined in win8.
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*/
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u16 sub_channel_index;
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u16 reserved3;
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} __packed;
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/* Server Flags */
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@ -660,7 +668,25 @@ struct vmbus_channel_offer_channel {
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struct vmbus_channel_offer offer;
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u32 child_relid;
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u8 monitorid;
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u8 monitor_allocated;
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/*
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* win7 and beyond splits this field into a bit field.
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*/
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u8 monitor_allocated:1;
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u8 reserved:7;
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/*
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* These are new fields added in win7 and later.
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* Do not access these fields without checking the
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* negotiated protocol.
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*
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* If "is_dedicated_interrupt" is set, we must not set the
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* associated bit in the channel bitmap while sending the
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* interrupt to the host.
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*
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* connection_id is to be used in signaling the host.
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*/
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u16 is_dedicated_interrupt:1;
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u16 reserved1:15;
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u32 connection_id;
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} __packed;
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/* Rescind Offer parameters */
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