vmbus: expose hv_begin/end_read (6e47dd3e) · Commits · 戴 / test

drivers/hv/hyperv_vmbus.h

+0 −4

Original line number	Diff line number	Diff line
		@@ -292,10 +292,6 @@ int hv_ringbuffer_read(struct vmbus_channel *channel,
		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

+0 −20

Original line number	Diff line number	Diff line
		@@ -32,26 +32,6 @@

		#include "hyperv_vmbus.h"

		void hv_begin_read(struct hv_ring_buffer_info *rbi)
		{
		rbi->ring_buffer->interrupt_mask = 1;
		virt_mb();
		}

		u32 hv_end_read(struct hv_ring_buffer_info *rbi)
		{

		rbi->ring_buffer->interrupt_mask = 0;
		virt_mb();

		/*
		* Now check to see if the ring buffer is still empty.
		* If it is not, we raced and we need to process new
		* incoming messages.
		*/
		return hv_get_bytes_to_read(rbi);
		}

		/*
		* When we write to the ring buffer, check if the host needs to
		* be signaled. Here is the details of this protocol:

+30 −0

Original line number	Diff line number	Diff line
		@@ -1512,6 +1512,36 @@ init_cached_read_index(struct vmbus_channel *channel)
		rbi->cached_read_index = rbi->ring_buffer->read_index;
		}

		/*
		* Mask off host interrupt callback notifications
		*/
		static inline void hv_begin_read(struct hv_ring_buffer_info *rbi)
		{
		rbi->ring_buffer->interrupt_mask = 1;

		/* make sure mask update is not reordered */
		virt_mb();
		}

		/*
		* Re-enable host callback and return number of outstanding bytes
		*/
		static inline u32 hv_end_read(struct hv_ring_buffer_info *rbi)
		{

		rbi->ring_buffer->interrupt_mask = 0;

		/* make sure mask update is not reordered */
		virt_mb();

		/*
		* Now check to see if the ring buffer is still empty.
		* If it is not, we raced and we need to process new
		* incoming messages.
		*/
		return hv_get_bytes_to_read(rbi);
		}

		/*
		* An API to support in-place processing of incoming VMBUS packets.
		*/