2 * Copyright (c) 2000 Doug Rabson
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/sys/pci/agp_sis.c,v 1.1.2.1 2000/07/19 09:48:04 ru Exp $
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/malloc.h>
35 #include <sys/kernel.h>
39 #include <pci/pcivar.h>
40 #include <pci/pcireg.h>
41 #include <pci/agppriv.h>
42 #include <pci/agpreg.h>
45 #include <vm/vm_object.h>
48 struct agp_sis_softc {
50 u_int32_t initial_aperture; /* aperture size at startup */
51 struct agp_gatt *gatt;
55 agp_sis_match(device_t dev)
57 if (pci_get_class(dev) != PCIC_BRIDGE
58 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
61 if (agp_find_caps(dev) == 0)
64 switch (pci_get_devid(dev)) {
66 return ("SiS 5591 host to AGP bridge");
69 if (pci_get_vendor(dev) == 0x1039)
70 return ("SIS Generic host to PCI bridge");
76 agp_sis_probe(device_t dev)
80 desc = agp_sis_match(dev);
83 device_set_desc(dev, desc);
91 agp_sis_attach(device_t dev)
93 struct agp_sis_softc *sc = device_get_softc(dev);
94 struct agp_gatt *gatt;
97 error = agp_generic_attach(dev);
101 sc->initial_aperture = AGP_GET_APERTURE(dev);
104 gatt = agp_alloc_gatt(dev);
109 * Probably contigmalloc failure. Try reducing the
110 * aperture so that the gatt size reduces.
112 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
113 agp_generic_detach(dev);
119 /* Install the gatt. */
120 pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4);
122 /* Enable the aperture. */
123 pci_write_config(dev, AGP_SIS_WINCTRL,
124 pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1);
127 * Enable the TLB and make it automatically invalidate entries
128 * when the GATT is written.
130 pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1);
136 agp_sis_detach(device_t dev)
138 struct agp_sis_softc *sc = device_get_softc(dev);
141 error = agp_generic_detach(dev);
145 /* Disable the aperture.. */
146 pci_write_config(dev, AGP_SIS_WINCTRL,
147 pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1);
150 pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1);
152 /* Put the aperture back the way it started. */
153 AGP_SET_APERTURE(dev, sc->initial_aperture);
155 agp_free_gatt(sc->gatt);
160 agp_sis_get_aperture(device_t dev)
165 * The aperture size is equal to 4M<<gws.
167 gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4;
168 return (4*1024*1024) << gws;
172 agp_sis_set_aperture(device_t dev, u_int32_t aperture)
177 * Check for a power of two and make sure its within the
178 * programmable range.
180 if (aperture & (aperture - 1)
181 || aperture < 4*1024*1024
182 || aperture > 256*1024*1024)
185 gws = ffs(aperture / 4*1024*1024) - 1;
187 pci_write_config(dev, AGP_SIS_WINCTRL,
188 ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70)
195 agp_sis_bind_page(device_t dev, int offset, vm_offset_t physical)
197 struct agp_sis_softc *sc = device_get_softc(dev);
199 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
202 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
207 agp_sis_unbind_page(device_t dev, int offset)
209 struct agp_sis_softc *sc = device_get_softc(dev);
211 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
214 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
219 agp_sis_flush_tlb(device_t dev)
221 pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1);
224 static device_method_t agp_sis_methods[] = {
225 /* Device interface */
226 DEVMETHOD(device_probe, agp_sis_probe),
227 DEVMETHOD(device_attach, agp_sis_attach),
228 DEVMETHOD(device_detach, agp_sis_detach),
229 DEVMETHOD(device_shutdown, bus_generic_shutdown),
230 DEVMETHOD(device_suspend, bus_generic_suspend),
231 DEVMETHOD(device_resume, bus_generic_resume),
234 DEVMETHOD(agp_get_aperture, agp_sis_get_aperture),
235 DEVMETHOD(agp_set_aperture, agp_sis_set_aperture),
236 DEVMETHOD(agp_bind_page, agp_sis_bind_page),
237 DEVMETHOD(agp_unbind_page, agp_sis_unbind_page),
238 DEVMETHOD(agp_flush_tlb, agp_sis_flush_tlb),
239 DEVMETHOD(agp_enable, agp_generic_enable),
240 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
241 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
242 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
243 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
248 static driver_t agp_sis_driver = {
251 sizeof(struct agp_sis_softc),
254 static devclass_t agp_devclass;
256 DRIVER_MODULE(agp_sis, pci, agp_sis_driver, agp_devclass, 0, 0);