From 7a9b291ab55dd9dcfeb35217f6105ad57c94f433 Mon Sep 17 00:00:00 2001
From: Kevin E Martin <kem@kem.org>
Date: Tue, 22 Feb 2000 15:43:59 +0000
Subject: Import of XFree86 3.9.18

---
 linux/mga_dma.h | 112 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 linux/mga_dma.h

(limited to 'linux/mga_dma.h')

diff --git a/linux/mga_dma.h b/linux/mga_dma.h
new file mode 100644
index 00000000..7f1c5795
--- /dev/null
+++ b/linux/mga_dma.h
@@ -0,0 +1,112 @@
+#ifndef MGA_DMA_H
+#define MGA_DMA_H
+
+#include "mga_drm_public.h"
+
+
+/* Isn't this fun.  This has to be fixed asap by emitting primary
+ * dma commands in the 'do_dma' ioctl.
+ */
+typedef struct {
+	int dma_type;
+
+   	unsigned int ContextState[MGA_CTX_SETUP_SIZE];
+   	unsigned int ServerState[MGA_2D_SETUP_SIZE];
+   	unsigned int TexState[2][MGA_TEX_SETUP_SIZE];
+   	unsigned int WarpPipe;
+   	unsigned int dirty;
+
+   	unsigned int nbox;
+   	xf86drmClipRectRec boxes[MGA_NR_SAREA_CLIPRECTS];
+} drm_mga_buf_priv_t;
+
+
+#define MGA_DMA_GENERAL 0
+#define MGA_DMA_VERTEX  1
+#define MGA_DMA_SETUP   2
+#define MGA_DMA_ILOAD   3
+
+
+#define DWGREG0 	0x1c00
+#define DWGREG0_END 	0x1dff
+#define DWGREG1		0x2c00
+#define DWGREG1_END	0x2dff
+
+#define ISREG0(r)	(r >= DWGREG0 && r <= DWGREG0_END)
+#define ADRINDEX0(r)	(u8)((r - DWGREG0) >> 2)
+#define ADRINDEX1(r)	(u8)(((r - DWGREG1) >> 2) | 0x80)
+#define ADRINDEX(r)	(ISREG0(r) ? ADRINDEX0(r) : ADRINDEX1(r)) 
+
+
+/* Macros for inserting commands into a secondary dma buffer.
+ */
+
+#define DMALOCALS	u8 tempIndex[4]; u32 *dma_ptr; \
+			int outcount, num_dwords;
+
+#define	DMAGETPTR(buf) do {			\
+  dma_ptr = (u32 *)((u8 *)buf->address + buf->used);	\
+  outcount = 0;					\
+  num_dwords = buf->used / 4;			\
+} while(0)
+
+#define DMAADVANCE(buf)	do {			\
+  buf->used = num_dwords * 4;			\
+} while(0)
+
+#define DMAOUTREG(reg, val) do {		\
+  tempIndex[outcount]=ADRINDEX(reg);		\
+  dma_ptr[++outcount] = val;			\
+  if (outcount == 4) {				\
+     outcount = 0;				\
+     dma_ptr[0] = *(u32 *)tempIndex;		\
+     dma_ptr+=5;				\
+     num_dwords += 5;				\
+  }						\
+}while (0)
+
+
+
+#define VERBO 0
+
+
+/* Primary buffer versions of above -- pretty similar really.
+ */
+#define PRIMLOCALS	u8 tempIndex[4]; u32 *dma_ptr; u32 phys_head; \
+			int outcount, num_dwords
+
+#define PRIMRESET(dev_priv) do {				\
+	dev_priv->prim_num_dwords = 0;				\
+   	dev_priv->current_dma_ptr = dev_priv->prim_head;	\
+} while (0)
+	
+#define	PRIMGETPTR(dev_priv) do {		\
+	dma_ptr = dev_priv->current_dma_ptr;	\
+	phys_head = dev_priv->prim_phys_head;	\
+	num_dwords = dev_priv->prim_num_dwords;	\
+	outcount = 0;				\
+} while (0)
+
+#define PRIMADVANCE(dev_priv)	do {		\
+	dev_priv->prim_num_dwords = num_dwords;	\
+	dev_priv->current_dma_ptr = dma_ptr;	\
+} while (0)
+
+#define PRIMOUTREG(reg, val) do {					\
+	tempIndex[outcount]=ADRINDEX(reg);				\
+	dma_ptr[1+outcount] = val;					\
+	if( ++outcount == 4) {						\
+		outcount = 0;						\
+		dma_ptr[0] = *(u32 *)tempIndex;				\
+		dma_ptr+=5;						\
+		num_dwords += 5;					\
+	}								\
+	if (VERBO) 							\
+		printk(KERN_INFO 					\
+		       "OUT %x val %x dma_ptr %p nr_dwords %d\n",	\
+		       outcount, ADRINDEX(reg), dma_ptr, 		\
+		       num_dwords);   					\
+}while (0)
+
+
+#endif
-- 
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