Staging: hv: Move a subset of definitions from ring_buffer.h to hyperv.h

Move a subset of definitions from ring_buffer.h to hyperv.h.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Abhishek Kane <v-abkane@microsoft.com>
Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 41 insertions, 0 deletions

diff --git a/drivers/staging/hv/hyperv.h b/drivers/staging/hv/hyperv.h
index 22e434a55362..0baa868e4d32 100644
--- a/drivers/staging/hv/hyperv.h
+++ b/drivers/staging/hv/hyperv.h
@@ -59,5 +59,46 @@ struct hv_multipage_buffer {
 
 #pragma pack(pop)
 
+struct hv_ring_buffer {
+	/* Offset in bytes from the start of ring data below */
+	u32 write_index;
+
+	/* Offset in bytes from the start of ring data below */
+	u32 read_index;
+
+	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.
+	 */
+
+	/*
+	 * Ring data starts here + RingDataStartOffset
+	 * !!! DO NOT place any fields below this !!!
+	 */
+	u8 buffer[0];
+} __packed;
+
+struct hv_ring_buffer_info {
+	struct hv_ring_buffer *ring_buffer;
+	u32 ring_size;			/* Include the shared header */
+	spinlock_t ring_lock;
+
+	u32 ring_datasize;		/* < ring_size */
+	u32 ring_data_startoffset;
+};
+
+struct hv_ring_buffer_debug_info {
+	u32 current_interrupt_mask;
+	u32 current_read_index;
+	u32 current_write_index;
+	u32 bytes_avail_toread;
+	u32 bytes_avail_towrite;
+};
 
 #endif /* _HYPERV_H */