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_ali.c,v 1.1.2.1 2000/07/19 09:48:04 ru Exp $
27 * $DragonFly: src/sys/dev/agp/agp_ali.c,v 1.3 2003/08/07 21:16:48 dillon Exp $
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/malloc.h>
36 #include <sys/kernel.h>
40 #include <bus/pci/pcivar.h>
41 #include <bus/pci/pcireg.h>
46 #include <vm/vm_object.h>
49 struct agp_ali_softc {
51 u_int32_t initial_aperture; /* aperture size at startup */
52 struct agp_gatt *gatt;
56 agp_ali_match(device_t dev)
58 if (pci_get_class(dev) != PCIC_BRIDGE
59 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
62 if (agp_find_caps(dev) == 0)
65 switch (pci_get_devid(dev)) {
67 return ("Ali M1541 host to AGP bridge");
70 if (pci_get_vendor(dev) == 0x10b9)
71 return ("Ali Generic host to PCI bridge");
77 agp_ali_probe(device_t dev)
81 desc = agp_ali_match(dev);
84 device_set_desc(dev, desc);
92 agp_ali_attach(device_t dev)
94 struct agp_ali_softc *sc = device_get_softc(dev);
95 struct agp_gatt *gatt;
98 error = agp_generic_attach(dev);
102 sc->initial_aperture = AGP_GET_APERTURE(dev);
105 gatt = agp_alloc_gatt(dev);
110 * Probably contigmalloc failure. Try reducing the
111 * aperture so that the gatt size reduces.
113 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
114 agp_generic_detach(dev);
120 /* Install the gatt. */
121 pci_write_config(dev, AGP_ALI_ATTBASE,
123 | (pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff)),
126 /* Enable the TLB. */
127 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
133 agp_ali_detach(device_t dev)
135 struct agp_ali_softc *sc = device_get_softc(dev);
138 error = agp_generic_detach(dev);
142 /* Disable the TLB.. */
143 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
145 /* Put the aperture back the way it started. */
146 AGP_SET_APERTURE(dev, sc->initial_aperture);
147 pci_write_config(dev, AGP_ALI_ATTBASE,
148 pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff,
151 agp_free_gatt(sc->gatt);
157 static u_int32_t agp_ali_table[] = {
161 4*M, /* 3 - invalid */
162 8*M, /* 4 - invalid */
164 16*M, /* 6 - invalid */
165 32*M, /* 7 - invalid */
166 64*M, /* 8 - invalid */
167 128*M, /* 9 - invalid */
168 256*M, /* 10 - invalid */
170 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0]))
173 agp_ali_get_aperture(device_t dev)
176 * The aperture size is derived from the low bits of attbase.
177 * I'm not sure this is correct..
179 int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff;
180 if (i >= agp_ali_table_size)
182 return agp_ali_table[i];
186 agp_ali_set_aperture(device_t dev, u_int32_t aperture)
190 for (i = 0; i < agp_ali_table_size; i++)
191 if (agp_ali_table[i] == aperture)
193 if (i == agp_ali_table_size)
196 pci_write_config(dev, AGP_ALI_ATTBASE,
197 ((pci_read_config(dev, AGP_ALI_ATTBASE, 4) & ~0xff)
203 agp_ali_bind_page(device_t dev, int offset, vm_offset_t physical)
205 struct agp_ali_softc *sc = device_get_softc(dev);
207 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
210 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
215 agp_ali_unbind_page(device_t dev, int offset)
217 struct agp_ali_softc *sc = device_get_softc(dev);
219 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
222 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
227 agp_ali_flush_tlb(device_t dev)
229 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
230 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
233 static device_method_t agp_ali_methods[] = {
234 /* Device interface */
235 DEVMETHOD(device_probe, agp_ali_probe),
236 DEVMETHOD(device_attach, agp_ali_attach),
237 DEVMETHOD(device_detach, agp_ali_detach),
238 DEVMETHOD(device_shutdown, bus_generic_shutdown),
239 DEVMETHOD(device_suspend, bus_generic_suspend),
240 DEVMETHOD(device_resume, bus_generic_resume),
243 DEVMETHOD(agp_get_aperture, agp_ali_get_aperture),
244 DEVMETHOD(agp_set_aperture, agp_ali_set_aperture),
245 DEVMETHOD(agp_bind_page, agp_ali_bind_page),
246 DEVMETHOD(agp_unbind_page, agp_ali_unbind_page),
247 DEVMETHOD(agp_flush_tlb, agp_ali_flush_tlb),
248 DEVMETHOD(agp_enable, agp_generic_enable),
249 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
250 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
251 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
252 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
257 static driver_t agp_ali_driver = {
260 sizeof(struct agp_ali_softc),
263 static devclass_t agp_devclass;
265 DRIVER_MODULE(agp_ali, pci, agp_ali_driver, agp_devclass, 0, 0);