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authorK. Y. Srinivasan <kys@microsoft.com>2012-12-01 18:46:32 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-01-17 22:46:39 +0400
commit6fdf3b21433e901dcba0ac186f00d604ce944f56 (patch)
tree57ba241493d522388a1d8eda8663f43c96b57f32 /drivers/hv/hyperv_vmbus.h
parent0bffd25ce919f88ea6473150b66d26e7fa5712af (diff)
downloadlinux-6fdf3b21433e901dcba0ac186f00d604ce944f56.tar.xz
Drivers: hv: Implement routines for read side signaling optimization
Implement functions that will support read-side signaling optimization. By having the reader indicate the start of the "read" operation and the "end" of the read operation we can more efficiently handle the signaling protocol: while the read is in progress, there is no need for the "writer" to signal the "reader" as new items are put on the read queue. 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>
Diffstat (limited to 'drivers/hv/hyperv_vmbus.h')
-rw-r--r--drivers/hv/hyperv_vmbus.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h
index d8d1fadb398a..3184f6ff4e74 100644
--- a/drivers/hv/hyperv_vmbus.h
+++ b/drivers/hv/hyperv_vmbus.h
@@ -570,6 +570,10 @@ u32 hv_get_ringbuffer_interrupt_mask(struct hv_ring_buffer_info *ring_info);
void hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info,
struct hv_ring_buffer_debug_info *debug_info);
+void hv_begin_read(struct hv_ring_buffer_info *rbi);
+
+u32 hv_end_read(struct hv_ring_buffer_info *rbi);
+
/*
* Maximum channels is determined by the size of the interrupt page
* which is PAGE_SIZE. 1/2 of PAGE_SIZE is for send endpoint interrupt