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@@ -59,5 +59,46 @@ struct hv_multipage_buffer {
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#pragma pack(pop)
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+struct hv_ring_buffer {
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+ /* Offset in bytes from the start of ring data below */
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+ u32 write_index;
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+
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+ /* Offset in bytes from the start of ring data below */
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+ u32 read_index;
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+
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+ u32 interrupt_mask;
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+
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+ /* Pad it to PAGE_SIZE so that data starts on page boundary */
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+ u8 reserved[4084];
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+
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+ /* NOTE:
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+ * The interrupt_mask field is used only for channels but since our
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+ * vmbus connection also uses this data structure and its data starts
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+ * here, we commented out this field.
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+ */
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+
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+ /*
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+ * Ring data starts here + RingDataStartOffset
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+ * !!! DO NOT place any fields below this !!!
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+ */
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+ u8 buffer[0];
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+} __packed;
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+
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+struct hv_ring_buffer_info {
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+ struct hv_ring_buffer *ring_buffer;
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+ u32 ring_size; /* Include the shared header */
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+ spinlock_t ring_lock;
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+
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+ u32 ring_datasize; /* < ring_size */
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+ u32 ring_data_startoffset;
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+};
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+
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+struct hv_ring_buffer_debug_info {
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+ u32 current_interrupt_mask;
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+ u32 current_read_index;
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+ u32 current_write_index;
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+ u32 bytes_avail_toread;
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+ u32 bytes_avail_towrite;
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+};
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#endif /* _HYPERV_H */
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