Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 2416603e authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
Browse files

Drivers: hv: Update the ring buffer structure to match win8 functionality 



Update the ringbuffer structure to support win8 functionality.

Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 610071c3

include/linux/hyperv.h

+21 −7
Original line number Diff line number Diff line
@@ -325,14 +325,28 @@ struct hv_ring_buffer { 


	u32 interrupt_mask;



	/* Pad it to PAGE_SIZE so that data starts on page boundary */

	u8	reserved[4084];



	/* NOTE:

	 * The interrupt_mask field is used only for channels but since our

	 * vmbus connection also uses this data structure and its data starts

	 * here, we commented out this field.

	/*

	 * Win8 uses some of the reserved bits to implement

	 * interrupt driven flow management. On the send side

	 * we can request that the receiver interrupt the sender

	 * when the ring transitions from being full to being able

	 * to handle a message of size "pending_send_sz".

	 *

	 * Add necessary state for this enhancement.

	 */

	u32 pending_send_sz;



	u32 reserved1[12];



	union {

		struct {

			u32 feat_pending_send_sz:1;

		};

		u32 value;

	} feature_bits;



	/* Pad it to PAGE_SIZE so that data starts on page boundary */

	u8	reserved2[4028];



	/*

	 * Ring data starts here + RingDataStartOffset