agpgart: Split agpgart code into separate files.

The majority of this work was done by Dave Jones, I merely converted the
driver to the "new" pci api.

drivers/char/agp/Config.help

+CONFIG_AGP
+  AGP (Accelerated Graphics Port) is a bus system mainly used to
+  connect graphics cards to the rest of the system.
+
+  If you have an AGP system and you say Y here, it will be possible to
+  use the AGP features of your 3D rendering video card. This code acts
+  as a sort of "AGP driver" for the motherboard's chipset.
+
+  If you need more texture memory than you can get with the AGP GART
+  (theoretically up to 256 MB, but in practice usually 64 or 128 MB
+  due to kernel allocation issues), you could use PCI accesses
+  and have up to a couple gigs of texture space.
+
+  Note that this is the only means to have XFree4/GLX use
+  write-combining with MTRR support on the AGP bus. Without it, OpenGL
+  direct rendering will be a lot slower but still faster than PIO.
+
+  You should say Y here if you use XFree86 3.3.6 or 4.x and want to
+  use GLX or DRI.  If unsure, say N.
+
+  This driver is available as a module.  If you want to compile it as
+  a module, say M here and read <file:Documentation/modules.txt>.  The
+  module will be called agpgart.o.
+
+CONFIG_AGP_INTEL
+  This option gives you AGP support for the GLX component of the
+  XFree86 4.x on Intel 440LX/BX/GX, 815, 820, 830, 840, 845, 850 and 860 chipsets.
+
+  You should say Y here if you use XFree86 3.3.6 or 4.x and want to
+  use GLX or DRI.  If unsure, say N.
+
+CONFIG_AGP_I810
+  This option gives you AGP support for the Xserver on the Intel 810
+  815 and 830m chipset boards for their on-board integrated graphics. This
+  is required to do any useful video modes with these boards.
+
+CONFIG_AGP_I460
+  This option gives you AGP GART support for the Intel 460GX chipset
+  for IA64 processors.
+
+CONFIG_AGP_VIA
+  This option gives you AGP support for the GLX component of the
+  XFree86 4.x on VIA MPV3/Apollo Pro chipsets.
+
+  You should say Y here if you use XFree86 3.3.6 or 4.x and want to
+  use GLX or DRI.  If unsure, say N.
+
+CONFIG_AGP_AMD
+  This option gives you AGP support for the GLX component of the
+  XFree86 4.x on AMD Irongate, 761, and 762 chipsets.
+
+  You should say Y here if you use XFree86 3.3.6 or 4.x and want to
+  use GLX or DRI.  If unsure, say N.
+
+CONFIG_AGP_SIS
+  This option gives you AGP support for the GLX component of the "soon
+  to be released" XFree86 4.x on Silicon Integrated Systems [SiS]
+  chipsets.
+
+  Note that 5591/5592 AGP chipsets are NOT supported.
+
+  You should say Y here if you use XFree86 3.3.6 or 4.x and want to
+  use GLX or DRI.  If unsure, say N.
+
+CONFIG_AGP_SWORKS
+  Say Y here to support the Serverworks AGP card.  See 
+  <http://www.serverworks.com/> for product descriptions and images.
+
+CONFIG_AGP_ALI
+  This option gives you AGP support for the GLX component of the
+  XFree86 4.x on the following ALi chipsets.  The supported chipsets
+  include M1541, M1621, M1631, M1632, M1641,M1647,and M1651.
+  For the ALi-chipset question, ALi suggests you refer to
+  <http://www.ali.com.tw/eng/support/index.shtml>.
+
+  The M1541 chipset can do AGP 1x and 2x, but note that there is an
+  acknowledged incompatibility with Matrox G200 cards. Due to
+  timing issues, this chipset cannot do AGP 2x with the G200.
+  This is a hardware limitation. AGP 1x seems to be fine, though.
+
+  You should say Y here if you use XFree86 3.3.6 or 4.x and want to
+  use GLX or DRI.  If unsure, say N.
+
+CONFIG_AGP_HP_ZX1
+  This option gives you AGP GART support for the HP ZX1 chipset
+  for IA64 processors.
+
+

drivers/char/agp/Config.in

+dep_tristate '/dev/agpgart (AGP Support)' CONFIG_AGP $CONFIG_DRM_AGP
+if [ "$CONFIG_AGP" != "n" ]; then
+   bool '  Intel 440LX/BX/GX and I815/I820/I830M/I830MP/I840/I845/I850/I860 support' CONFIG_AGP_INTEL
+   bool '  Intel I810/I815/I830M (on-board) support' CONFIG_AGP_I810
+   bool '  VIA chipset support' CONFIG_AGP_VIA
+   bool '  AMD Irongate, 761, and 762 support' CONFIG_AGP_AMD
+   bool '  Generic SiS support' CONFIG_AGP_SIS
+   bool '  ALI chipset support' CONFIG_AGP_ALI
+   bool '  Serverworks LE/HE support' CONFIG_AGP_SWORKS
+   if [ "$CONFIG_IA64" = "y" ]; then
+     bool '  Intel 460GX support' CONFIG_AGP_I460
+     bool '  HP ZX1 AGP support' CONFIG_AGP_HP_ZX1
+   fi
+fi

drivers/char/agp/Makefile

@@ -5,7 +5,18 @@
 
 export-objs := agpgart_be.o
 
-agpgart-objs := agpgart_fe.o agpgart_be.o
+agpgart-y := agpgart_fe.o agpgart_be.o
+
+agpgart-$(CONFIG_AGP_INTEL)	+=	agpgart_be-i8x0.o
+agpgart-$(CONFIG_AGP_I810)	+=	agpgart_be-i810.o
+agpgart-$(CONFIG_AGP_VIA)	+=	agpgart_be-via.o
+agpgart-$(CONFIG_AGP_AMD)	+=	agpgart_be-amd.o
+agpgart-$(CONFIG_AGP_SIS)	+=	agpgart_be-sis.o
+agpgart-$(CONFIG_AGP_ALI)	+=	agpgart_be-ali.o
+agpgart-$(CONFIG_AGP_SWORKS)	+=	agpgart_be-sworks.o
+agpgart-$(CONFIG_AGP_I460)	+=	agpgart_be-i460.o
+agpgart-$(CONFIG_AGP_HP_ZX1)	+=	agpgart_be-hp.o
+agpgart-objs := $(agpgart-y)
 
 obj-$(CONFIG_AGP) += agpgart.o
 

drivers/char/agp/agpgart_be-ali.c

+/*
+ * AGPGART module version 0.99
+ * Copyright (C) 1999 Jeff Hartmann
+ * Copyright (C) 1999 Precision Insight, Inc.
+ * Copyright (C) 1999 Xi Graphics, Inc.
+ *
+ * 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
+ * JEFF HARTMANN, 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.
+ *
+ * TODO: 
+ * - Allocate more than order 0 pages to avoid too much linear map splitting.
+ */
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/agp_backend.h>
+#include "agp.h"
+
+static int ali_fetch_size(void)
+{
+	int i;
+	u32 temp;
+	struct aper_size_info_32 *values;
+
+	pci_read_config_dword(agp_bridge.dev, ALI_ATTBASE, &temp);
+	temp &= ~(0xfffffff0);
+	values = A_SIZE_32(agp_bridge.aperture_sizes);
+
+	for (i = 0; i < agp_bridge.num_aperture_sizes; i++) {
+		if (temp == values[i].size_value) {
+			agp_bridge.previous_size =
+			    agp_bridge.current_size = (void *) (values + i);
+			agp_bridge.aperture_size_idx = i;
+			return values[i].size;
+		}
+	}
+
+	return 0;
+}
+
+static void ali_tlbflush(agp_memory * mem)
+{
+	u32 temp;
+
+	pci_read_config_dword(agp_bridge.dev, ALI_TLBCTRL, &temp);
+// clear tag
+	pci_write_config_dword(agp_bridge.dev, ALI_TAGCTRL,
+			((temp & 0xfffffff0) | 0x00000001|0x00000002));
+}
+
+static void ali_cleanup(void)
+{
+	struct aper_size_info_32 *previous_size;
+	u32 temp;
+
+	previous_size = A_SIZE_32(agp_bridge.previous_size);
+
+	pci_read_config_dword(agp_bridge.dev, ALI_TLBCTRL, &temp);
+// clear tag
+	pci_write_config_dword(agp_bridge.dev, ALI_TAGCTRL,
+			((temp & 0xffffff00) | 0x00000001|0x00000002));
+
+	pci_read_config_dword(agp_bridge.dev,  ALI_ATTBASE, &temp);
+	pci_write_config_dword(agp_bridge.dev, ALI_ATTBASE,
+			((temp & 0x00000ff0) | previous_size->size_value));
+}
+
+static int ali_configure(void)
+{
+	u32 temp;
+	struct aper_size_info_32 *current_size;
+
+	current_size = A_SIZE_32(agp_bridge.current_size);
+
+	/* aperture size and gatt addr */
+	pci_read_config_dword(agp_bridge.dev, ALI_ATTBASE, &temp);
+	temp = (((temp & 0x00000ff0) | (agp_bridge.gatt_bus_addr & 0xfffff000))
+			| (current_size->size_value & 0xf));
+	pci_write_config_dword(agp_bridge.dev, ALI_ATTBASE, temp);
+
+	/* tlb control */
+
+	/*
+	 *	Question: Jeff, ALi's patch deletes this:
+	 *
+	 *	pci_read_config_dword(agp_bridge.dev, ALI_TLBCTRL, &temp);
+	 *	pci_write_config_dword(agp_bridge.dev, ALI_TLBCTRL,
+	 *			       ((temp & 0xffffff00) | 0x00000010));
+	 *
+	 *	and replaces it with the following, which seems to duplicate the
+	 *	next couple of lines below it. I suspect this was an oversight,
+	 *	but you might want to check up on this?
+	 */
+	
+	pci_read_config_dword(agp_bridge.dev, ALI_APBASE, &temp);
+	agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+
+	/* address to map to */
+	pci_read_config_dword(agp_bridge.dev, ALI_APBASE, &temp);
+	agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+
+#if 0
+	if (agp_bridge.type == ALI_M1541) {
+		u32 nlvm_addr = 0;
+
+		switch (current_size->size_value) {
+			case 0:  break;
+			case 1:  nlvm_addr = 0x100000;break;
+			case 2:  nlvm_addr = 0x200000;break;
+			case 3:  nlvm_addr = 0x400000;break;
+			case 4:  nlvm_addr = 0x800000;break;
+			case 6:  nlvm_addr = 0x1000000;break;
+			case 7:  nlvm_addr = 0x2000000;break;
+			case 8:  nlvm_addr = 0x4000000;break;
+			case 9:  nlvm_addr = 0x8000000;break;
+			case 10: nlvm_addr = 0x10000000;break;
+			default: break;
+		}
+		nlvm_addr--;
+		nlvm_addr&=0xfff00000;
+
+		nlvm_addr+= agp_bridge.gart_bus_addr;
+		nlvm_addr|=(agp_bridge.gart_bus_addr>>12);
+		printk(KERN_INFO PFX "nlvm top &base = %8x\n",nlvm_addr);
+	}
+#endif
+
+	pci_read_config_dword(agp_bridge.dev, ALI_TLBCTRL, &temp);
+	temp &= 0xffffff7f;		//enable TLB
+	pci_write_config_dword(agp_bridge.dev, ALI_TLBCTRL, temp);
+
+	return 0;
+}
+
+static unsigned long ali_mask_memory(unsigned long addr, int type)
+{
+	/* Memory type is ignored */
+
+	return addr | agp_bridge.masks[0].mask;
+}
+
+static void ali_cache_flush(void)
+{
+	global_cache_flush();
+
+	if (agp_bridge.type == ALI_M1541) {
+		int i, page_count;
+		u32 temp;
+
+		page_count = 1 << A_SIZE_32(agp_bridge.current_size)->page_order;
+		for (i = 0; i < PAGE_SIZE * page_count; i += PAGE_SIZE) {
+			pci_read_config_dword(agp_bridge.dev, ALI_CACHE_FLUSH_CTRL, &temp);
+			pci_write_config_dword(agp_bridge.dev, ALI_CACHE_FLUSH_CTRL,
+					(((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
+					  (agp_bridge.gatt_bus_addr + i)) |
+					    ALI_CACHE_FLUSH_EN));
+		}
+	}
+}
+
+static void *ali_alloc_page(void)
+{
+	void *adr = agp_generic_alloc_page();
+	u32 temp;
+
+	if (adr == 0)
+		return 0;
+
+	if (agp_bridge.type == ALI_M1541) {
+		pci_read_config_dword(agp_bridge.dev, ALI_CACHE_FLUSH_CTRL, &temp);
+		pci_write_config_dword(agp_bridge.dev, ALI_CACHE_FLUSH_CTRL,
+				(((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
+				  virt_to_phys(adr)) |
+				    ALI_CACHE_FLUSH_EN ));
+	}
+	return adr;
+}
+
+static void ali_destroy_page(void * addr)
+{
+	u32 temp;
+
+	if (addr == NULL)
+		return;
+
+	global_cache_flush();
+
+	if (agp_bridge.type == ALI_M1541) {
+		pci_read_config_dword(agp_bridge.dev, ALI_CACHE_FLUSH_CTRL, &temp);
+		pci_write_config_dword(agp_bridge.dev, ALI_CACHE_FLUSH_CTRL,
+				(((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
+				  virt_to_phys(addr)) |
+				    ALI_CACHE_FLUSH_EN));
+	}
+
+	agp_generic_destroy_page(addr);
+}
+
+/* Setup function */
+static struct gatt_mask ali_generic_masks[] =
+{
+	{mask: 0x00000000, type: 0}
+};
+
+static struct aper_size_info_32 ali_generic_sizes[7] =
+{
+	{256, 65536, 6, 10},
+	{128, 32768, 5, 9},
+	{64, 16384, 4, 8},
+	{32, 8192, 3, 7},
+	{16, 4096, 2, 6},
+	{8, 2048, 1, 4},
+	{4, 1024, 0, 3}
+};
+
+int __init ali_generic_setup (struct pci_dev *pdev)
+{
+	agp_bridge.masks = ali_generic_masks;
+	agp_bridge.num_of_masks = 1;
+	agp_bridge.aperture_sizes = (void *) ali_generic_sizes;
+	agp_bridge.size_type = U32_APER_SIZE;
+	agp_bridge.num_aperture_sizes = 7;
+	agp_bridge.dev_private_data = NULL;
+	agp_bridge.needs_scratch_page = FALSE;
+	agp_bridge.configure = ali_configure;
+	agp_bridge.fetch_size = ali_fetch_size;
+	agp_bridge.cleanup = ali_cleanup;
+	agp_bridge.tlb_flush = ali_tlbflush;
+	agp_bridge.mask_memory = ali_mask_memory;
+	agp_bridge.agp_enable = agp_generic_agp_enable;
+	agp_bridge.cache_flush = ali_cache_flush;
+	agp_bridge.create_gatt_table = agp_generic_create_gatt_table;
+	agp_bridge.free_gatt_table = agp_generic_free_gatt_table;
+	agp_bridge.insert_memory = agp_generic_insert_memory;
+	agp_bridge.remove_memory = agp_generic_remove_memory;
+	agp_bridge.alloc_by_type = agp_generic_alloc_by_type;
+	agp_bridge.free_by_type = agp_generic_free_by_type;
+	agp_bridge.agp_alloc_page = ali_alloc_page;
+	agp_bridge.agp_destroy_page = ali_destroy_page;
+	agp_bridge.suspend = agp_generic_suspend;
+	agp_bridge.resume = agp_generic_resume;
+	agp_bridge.cant_use_aperture = 0;
+
+	return 0;
+	
+	(void) pdev; /* unused */
+}
+

drivers/char/agp/agpgart_be-sis.c

+/*
+ * AGPGART module version 0.99
+ * Copyright (C) 1999 Jeff Hartmann
+ * Copyright (C) 1999 Precision Insight, Inc.
+ * Copyright (C) 1999 Xi Graphics, Inc.
+ *
+ * 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
+ * JEFF HARTMANN, 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.
+ *
+ * TODO: 
+ * - Allocate more than order 0 pages to avoid too much linear map splitting.
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/agp_backend.h>
+#include "agp.h"
+
+static int sis_fetch_size(void)
+{
+	u8 temp_size;
+	int i;
+	struct aper_size_info_8 *values;
+
+	pci_read_config_byte(agp_bridge.dev, SIS_APSIZE, &temp_size);
+	values = A_SIZE_8(agp_bridge.aperture_sizes);
+	for (i = 0; i < agp_bridge.num_aperture_sizes; i++) {
+		if ((temp_size == values[i].size_value) ||
+		    ((temp_size & ~(0x03)) ==
+		     (values[i].size_value & ~(0x03)))) {
+			agp_bridge.previous_size =
+			    agp_bridge.current_size = (void *) (values + i);
+
+			agp_bridge.aperture_size_idx = i;
+			return values[i].size;
+		}
+	}
+
+	return 0;
+}
+
+
+static void sis_tlbflush(agp_memory * mem)
+{
+	pci_write_config_byte(agp_bridge.dev, SIS_TLBFLUSH, 0x02);
+}
+
+static int sis_configure(void)
+{
+	u32 temp;
+	struct aper_size_info_8 *current_size;
+
+	current_size = A_SIZE_8(agp_bridge.current_size);
+	pci_write_config_byte(agp_bridge.dev, SIS_TLBCNTRL, 0x05);
+	pci_read_config_dword(agp_bridge.dev, SIS_APBASE, &temp);
+	agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+	pci_write_config_dword(agp_bridge.dev, SIS_ATTBASE,
+			       agp_bridge.gatt_bus_addr);
+	pci_write_config_byte(agp_bridge.dev, SIS_APSIZE,
+			      current_size->size_value);
+	return 0;
+}
+
+static void sis_cleanup(void)
+{
+	struct aper_size_info_8 *previous_size;
+
+	previous_size = A_SIZE_8(agp_bridge.previous_size);
+	pci_write_config_byte(agp_bridge.dev, SIS_APSIZE,
+			      (previous_size->size_value & ~(0x03)));
+}
+
+static unsigned long sis_mask_memory(unsigned long addr, int type)
+{
+	/* Memory type is ignored */
+
+	return addr | agp_bridge.masks[0].mask;
+}
+
+static struct aper_size_info_8 sis_generic_sizes[7] =
+{
+	{256, 65536, 6, 99},
+	{128, 32768, 5, 83},
+	{64, 16384, 4, 67},
+	{32, 8192, 3, 51},
+	{16, 4096, 2, 35},
+	{8, 2048, 1, 19},
+	{4, 1024, 0, 3}
+};
+
+static struct gatt_mask sis_generic_masks[] =
+{
+	{mask: 0x00000000, type: 0}
+};
+
+int __init sis_generic_setup (struct pci_dev *pdev)
+{
+	agp_bridge.masks = sis_generic_masks;
+	agp_bridge.num_of_masks = 1;
+	agp_bridge.aperture_sizes = (void *) sis_generic_sizes;
+	agp_bridge.size_type = U8_APER_SIZE;
+	agp_bridge.num_aperture_sizes = 7;
+	agp_bridge.dev_private_data = NULL;
+	agp_bridge.needs_scratch_page = FALSE;
+	agp_bridge.configure = sis_configure;
+	agp_bridge.fetch_size = sis_fetch_size;
+	agp_bridge.cleanup = sis_cleanup;
+	agp_bridge.tlb_flush = sis_tlbflush;
+	agp_bridge.mask_memory = sis_mask_memory;
+	agp_bridge.agp_enable = agp_generic_agp_enable;
+	agp_bridge.cache_flush = global_cache_flush;
+	agp_bridge.create_gatt_table = agp_generic_create_gatt_table;
+	agp_bridge.free_gatt_table = agp_generic_free_gatt_table;
+	agp_bridge.insert_memory = agp_generic_insert_memory;
+	agp_bridge.remove_memory = agp_generic_remove_memory;
+	agp_bridge.alloc_by_type = agp_generic_alloc_by_type;
+	agp_bridge.free_by_type = agp_generic_free_by_type;
+	agp_bridge.agp_alloc_page = agp_generic_alloc_page;
+	agp_bridge.agp_destroy_page = agp_generic_destroy_page;
+	agp_bridge.suspend = agp_generic_suspend;
+	agp_bridge.resume = agp_generic_resume;
+	agp_bridge.cant_use_aperture = 0;
+
+	return 0;
+}
+

drivers/char/agp/agpgart_be-via.c

+/*
+ * AGPGART module version 0.99
+ * Copyright (C) 1999 Jeff Hartmann
+ * Copyright (C) 1999 Precision Insight, Inc.
+ * Copyright (C) 1999 Xi Graphics, Inc.
+ *
+ * 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
+ * JEFF HARTMANN, 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.
+ *
+ * TODO: 
+ * - Allocate more than order 0 pages to avoid too much linear map splitting.
+ */
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/agp_backend.h>
+#include "agp.h"
+
+
+static int via_fetch_size(void)
+{
+	int i;
+	u8 temp;
+	struct aper_size_info_8 *values;
+
+	values = A_SIZE_8(agp_bridge.aperture_sizes);
+	pci_read_config_byte(agp_bridge.dev, VIA_APSIZE, &temp);
+	for (i = 0; i < agp_bridge.num_aperture_sizes; i++) {
+		if (temp == values[i].size_value) {
+			agp_bridge.previous_size =
+			    agp_bridge.current_size = (void *) (values + i);
+			agp_bridge.aperture_size_idx = i;
+			return values[i].size;
+		}
+	}
+
+	return 0;
+}
+
+static int via_configure(void)
+{
+	u32 temp;
+	struct aper_size_info_8 *current_size;
+
+	current_size = A_SIZE_8(agp_bridge.current_size);
+	/* aperture size */
+	pci_write_config_byte(agp_bridge.dev, VIA_APSIZE,
+			      current_size->size_value);
+	/* address to map too */
+	pci_read_config_dword(agp_bridge.dev, VIA_APBASE, &temp);
+	agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+
+	/* GART control register */
+	pci_write_config_dword(agp_bridge.dev, VIA_GARTCTRL, 0x0000000f);
+
+	/* attbase - aperture GATT base */
+	pci_write_config_dword(agp_bridge.dev, VIA_ATTBASE,
+			    (agp_bridge.gatt_bus_addr & 0xfffff000) | 3);
+	return 0;
+}
+
+static void via_cleanup(void)
+{
+	struct aper_size_info_8 *previous_size;
+
+	previous_size = A_SIZE_8(agp_bridge.previous_size);
+	pci_write_config_byte(agp_bridge.dev, VIA_APSIZE,
+			      previous_size->size_value);
+	/* Do not disable by writing 0 to VIA_ATTBASE, it screws things up
+	 * during reinitialization.
+	 */
+}
+
+static void via_tlbflush(agp_memory * mem)
+{
+	pci_write_config_dword(agp_bridge.dev, VIA_GARTCTRL, 0x0000008f);
+	pci_write_config_dword(agp_bridge.dev, VIA_GARTCTRL, 0x0000000f);
+}
+
+static unsigned long via_mask_memory(unsigned long addr, int type)
+{
+	/* Memory type is ignored */
+
+	return addr | agp_bridge.masks[0].mask;
+}
+
+static struct aper_size_info_8 via_generic_sizes[7] =
+{
+	{256, 65536, 6, 0},
+	{128, 32768, 5, 128},
+	{64, 16384, 4, 192},
+	{32, 8192, 3, 224},
+	{16, 4096, 2, 240},
+	{8, 2048, 1, 248},
+	{4, 1024, 0, 252}
+};
+
+static struct gatt_mask via_generic_masks[] =
+{
+	{mask: 0x00000000, type: 0}
+};
+
+int __init via_generic_setup (struct pci_dev *pdev)
+{
+	agp_bridge.masks = via_generic_masks;
+	agp_bridge.num_of_masks = 1;
+	agp_bridge.aperture_sizes = (void *) via_generic_sizes;
+	agp_bridge.size_type = U8_APER_SIZE;
+	agp_bridge.num_aperture_sizes = 7;
+	agp_bridge.dev_private_data = NULL;
+	agp_bridge.needs_scratch_page = FALSE;
+	agp_bridge.configure = via_configure;
+	agp_bridge.fetch_size = via_fetch_size;
+	agp_bridge.cleanup = via_cleanup;
+	agp_bridge.tlb_flush = via_tlbflush;
+	agp_bridge.mask_memory = via_mask_memory;
+	agp_bridge.agp_enable = agp_generic_agp_enable;
+	agp_bridge.cache_flush = global_cache_flush;
+	agp_bridge.create_gatt_table = agp_generic_create_gatt_table;
+	agp_bridge.free_gatt_table = agp_generic_free_gatt_table;
+	agp_bridge.insert_memory = agp_generic_insert_memory;
+	agp_bridge.remove_memory = agp_generic_remove_memory;
+	agp_bridge.alloc_by_type = agp_generic_alloc_by_type;
+	agp_bridge.free_by_type = agp_generic_free_by_type;
+	agp_bridge.agp_alloc_page = agp_generic_alloc_page;
+	agp_bridge.agp_destroy_page = agp_generic_destroy_page;
+	agp_bridge.suspend = agp_generic_suspend;
+	agp_bridge.resume = agp_generic_resume;
+	agp_bridge.cant_use_aperture = 0;
+
+	return 0;
+	
+	(void) pdev; /* unused */
+}

drivers/char/agp/agpgart_fe.c

@@ -24,29 +24,16 @@
  *
  */
 
-#define __NO_VERSION__
-#include <linux/version.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/string.h>
-#include <linux/errno.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
+#include <linux/mman.h>
 #include <linux/pci.h>
 #include <linux/init.h>
-#include <linux/pagemap.h>
 #include <linux/miscdevice.h>
 #include <linux/agp_backend.h>
 #include <linux/agpgart.h>
-#include <linux/smp_lock.h>
-#include <asm/system.h>
 #include <asm/uaccess.h>
-#include <asm/io.h>
-#include <asm/page.h>
-#include <asm/mman.h>
 
 #include "agp.h"
 

include/linux/agp_backend.h

@@ -81,13 +81,13 @@ enum chipset_type {
 	HP_ZX1,
 };
 
-typedef struct _agp_version {
+struct agp_version {
 	u16 major;
 	u16 minor;
-} agp_version;
+};
 
 typedef struct _agp_kern_info {
-	agp_version version;
+	struct agp_version version;
 	struct pci_dev *device;
 	enum chipset_type chipset;
 	unsigned long mode;

include/linux/agpgart.h

@@ -53,13 +53,13 @@
 #include <linux/types.h>
 #include <asm/types.h>
 
-typedef struct _agp_version {
+struct agp_version {
 	__u16 major;
 	__u16 minor;
-} agp_version;
+};
 
 typedef struct _agp_info {
-	agp_version version;	/* version of the driver        */
+	struct agp_version version;	/* version of the driver        */
 	__u32 bridge_id;	/* bridge vendor/device         */
 	__u32 agp_mode;		/* mode info of bridge          */
 	off_t aper_base;	/* base of aperture             */
@@ -117,7 +117,7 @@ typedef struct _agp_unbind {
 #define AGP_LOCK_INIT() 	sema_init(&(agp_fe.agp_mutex), 1)
 
 #ifndef _AGP_BACKEND_H
-typedef struct _agp_version {
+struct _agp_version {
 	u16 major;
 	u16 minor;
 } agp_version;
@@ -125,7 +125,7 @@ typedef struct _agp_version {
 #endif
 
 typedef struct _agp_info {
-	agp_version version;	/* version of the driver        */
+	struct agp_version version;	/* version of the driver        */
 	u32 bridge_id;		/* bridge vendor/device         */
 	u32 agp_mode;		/* mode info of bridge          */
 	off_t aper_base;	/* base of aperture             */