Initial import of the DRM (direct rendering manager).

This is the kernel part necessary for DRI support in X. Disabled for now
because it still has a few bugs, but now I can work on it in tree. Also
requires the requisite bits in X, which are currently under discussion
on how to deal with them with privsep. ported from a combination of the
free and netbsd implementations.

Known bugs:
1) only the first occurence of X in any session will have dri, after
that something prevents it working.
2) if the machine does not have a dri capable card, the kernel panics.
Something's up in one of the probe functions. I haven't been able to
find it though.
3) radeon cards need to be forced to use PCI mode otherwise they get
into an infinite loop.

This is known to at least kinda work with SiS, radeons in pci mode and
intel cards.

ok deraadt, kinda ok art, a few other people had a quick look.

1 files changed, 146 insertions, 0 deletions

diff --git a/sys/dev/pci/drm/sis_ds.h b/sys/dev/pci/drm/sis_ds.h
new file mode 100644
index 00000000000..0a3e3c7b0ad
--- /dev/null
+++ b/sys/dev/pci/drm/sis_ds.h
@@ -0,0 +1,146 @@
+/* sis_ds.h -- Private header for Direct Rendering Manager -*- linux-c -*-
+ * Created: Mon Jan  4 10:05:05 1999 by sclin@sis.com.tw
+ */
+/*
+ * Copyright 2000 Silicon Integrated Systems Corp, Inc., HsinChu, Taiwan.
+ * All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Sung-Ching Lin <sclin@sis.com.tw>
+ *
+ */
+
+#ifndef __SIS_DS_H__
+#define __SIS_DS_H__
+
+/* Set Data Structure */
+
+#define SET_SIZE 5000
+
+typedef unsigned long ITEM_TYPE;
+
+typedef struct {
+	ITEM_TYPE val;
+	int alloc_next, free_next;
+} list_item_t;
+
+typedef struct {
+	int alloc;
+	int free;
+	int trace;
+	list_item_t list[SET_SIZE];
+} set_t;
+
+set_t *setInit(void);
+int setAdd(set_t * set, ITEM_TYPE item);
+int setDel(set_t * set, ITEM_TYPE item);
+int setFirst(set_t * set, ITEM_TYPE * item);
+int setNext(set_t * set, ITEM_TYPE * item);
+int setDestroy(set_t * set);
+
+/*
+ * GLX Hardware Device Driver common code
+ * Copyright (C) 1999 Wittawat Yamwong
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * WITTAWAT YAMWONG, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
+ * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+struct mem_block_t {
+	struct mem_block_t *next;
+	struct mem_block_t *heap;
+	int ofs, size;
+	int align;
+	unsigned int free:1;
+	unsigned int reserved:1;
+};
+typedef struct mem_block_t TMemBlock;
+typedef struct mem_block_t *PMemBlock;
+
+/* a heap is just the first block in a chain */
+typedef struct mem_block_t memHeap_t;
+
+static __inline__ int mmBlockSize(PMemBlock b)
+{
+	return b->size;
+}
+
+static __inline__ int mmOffset(PMemBlock b)
+{
+	return b->ofs;
+}
+
+static __inline__ void mmMarkReserved(PMemBlock b)
+{
+	b->reserved = 1;
+}
+
+/*
+ * input: total size in bytes
+ * return: a heap pointer if OK, NULL if error
+ */
+memHeap_t *mmInit(int ofs, int size);
+
+/*
+ * Allocate 'size' bytes with 2^align2 bytes alignment,
+ * restrict the search to free memory after 'startSearch'
+ * depth and back buffers should be in different 4mb banks
+ * to get better page hits if possible
+ * input:	size = size of block
+ *       	align2 = 2^align2 bytes alignment
+ *		startSearch = linear offset from start of heap to begin search
+ * return: pointer to the allocated block, 0 if error
+ */
+PMemBlock mmAllocMem(memHeap_t * heap, int size, int align2, int startSearch);
+
+/*
+ * Returns 1 if the block 'b' is part of the heap 'heap'
+ */
+int mmBlockInHeap(PMemBlock heap, PMemBlock b);
+
+/*
+ * Free block starts at offset
+ * input: pointer to a block
+ * return: 0 if OK, -1 if error
+ */
+int mmFreeMem(PMemBlock b);
+
+/* For debuging purpose. */
+void mmDumpMemInfo(memHeap_t * mmInit);
+
+#endif				/* __SIS_DS_H__ */