1 files changed, 63 insertions, 0 deletions

diff --git a/sys/sys/_bus_dma.h b/sys/sys/_bus_dma.h
new file mode 100644
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--- /dev/null
+++ b/sys/sys/_bus_dma.h
@@ -0,0 +1,63 @@
+/*-
+ * Copyright 2006 John-Mark Gurney.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ *
+ */
+
+#ifndef _SYS__BUS_DMA_H_
+#define _SYS__BUS_DMA_H_
+
+typedef int bus_dmasync_op_t;
+
+/*
+ *	bus_dma_tag_t
+ *
+ *	A machine-dependent opaque type describing the characteristics
+ *	of how to perform DMA mappings.  This structure encapsultes
+ *	information concerning address and alignment restrictions, number
+ *	of S/G segments, amount of data per S/G segment, etc.
+ */
+typedef struct bus_dma_tag	*bus_dma_tag_t;
+
+/*
+ *	bus_dmamap_t
+ *
+ *	DMA mapping instance information.
+ */
+typedef struct bus_dmamap	*bus_dmamap_t;
+
+/*
+ * A function that performs driver-specific synchronization on behalf of
+ * busdma.
+ */
+typedef enum {
+	BUS_DMA_LOCK	= 0x01,
+	BUS_DMA_UNLOCK	= 0x02,
+} bus_dma_lock_op_t;
+
+typedef void bus_dma_lock_t(void *, bus_dma_lock_op_t);
+
+#endif /* !_SYS__BUS_DMA_H_ */