A driver for programming the AGP hardware. This is only very lightly

tested on Intel BX chipsets only. The other agp minidrivers are totally
untested.

The programming api is a subset of the Linux api and is only intended to
be enough for the X server to use. There is also an in-kernel api for the
use of other kernel modules such as the 3D DRI.

1 files changed, 103 insertions, 0 deletions

diff --git a/sys/pci/agppriv.h b/sys/pci/agppriv.h
new file mode 100644
index 0000000..427e68b
--- /dev/null
+++ b/sys/pci/agppriv.h
@@ -0,0 +1,103 @@
+/*-
+ * Copyright (c) 2000 Doug Rabson
+ * 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 _PCI_AGPPRIV_H_
+#define _PCI_AGPPRIV_H_
+
+/*
+ * This file *must not* be included by code outside the agp driver itself.
+ */
+
+#include <sys/agpio.h>
+#include <pci/agpvar.h>
+
+#define AGP_DEBUGxx
+
+#ifdef AGP_DEBUG
+#define AGP_DPF(x...) do {			\
+    printf("agp: ");				\
+    printf(##x);				\
+} while (0)
+#else
+#define AGP_DPF(x...) do {} while (0)
+#endif
+
+#include "agp_if.h"
+
+/*
+ * Data structure to describe an AGP memory allocation.
+ */
+TAILQ_HEAD(agp_memory_list, agp_memory);
+struct agp_memory {
+	TAILQ_ENTRY(agp_memory) am_link;	/* wiring for the tailq */
+	int		am_id;			/* unique id for block */
+	vm_size_t	am_size;		/* number of bytes allocated */
+	struct vm_object *am_obj;		/* VM object owning pages */
+	vm_offset_t	am_physical;		/* bogus hack for i810 */
+	vm_offset_t	am_offset;		/* page offset if bound */
+	int		am_is_bound;		/* non-zero if bound */
+};
+
+/*
+ * All chipset drivers must have this at the start of their softc.
+ */
+struct agp_softc {
+	struct resource	        *as_aperture;	/* location of aperture */
+	u_int32_t		as_maxmem;	/* allocation upper bound */
+	u_int32_t		as_allocated;	/* amount allocated */
+	enum agp_acquire_state	as_state;
+	struct agp_memory_list	as_memory;	/* list of allocated memory */
+	int			as_nextid;	/* next memory block id */
+	int			as_isopen;	/* user device is open */
+	dev_t			as_devnode;	/* from make_dev */
+	struct lock		as_lock;	/* lock for access to GATT */
+};
+
+struct agp_gatt {
+	u_int32_t	ag_entries;
+	u_int32_t      *ag_virtual;
+	vm_offset_t	ag_physical;
+};
+
+u_int8_t		agp_find_caps(device_t dev);
+struct agp_gatt	       *agp_alloc_gatt(device_t dev);
+void		        agp_free_gatt(struct agp_gatt *gatt);
+int			agp_generic_attach(device_t dev);
+int			agp_generic_detach(device_t dev);
+int			agp_generic_enable(device_t dev, u_int32_t mode);
+struct agp_memory      *agp_generic_alloc_memory(device_t dev, int type,
+						 vm_size_t size);
+int			agp_generic_free_memory(device_t dev,
+						struct agp_memory *mem);
+int			agp_generic_bind_memory(device_t dev,
+						struct agp_memory *mem,
+						vm_offset_t offset);
+int			agp_generic_unbind_memory(device_t dev,
+						  struct agp_memory *mem);
+
+#endif /* !_PCI_AGPPRIV_H_ */