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/dev/agp/agp_ali.c,v 1.20 2007/11/12 21:51:36 jhb Exp $
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/malloc.h>
32 #include <sys/kernel.h>
36 #include <bus/pci/pcivar.h>
37 #include <bus/pci/pcireg.h>
42 #include <vm/vm_object.h>
45 struct agp_ali_softc {
47 u_int32_t initial_aperture; /* aperture size at startup */
48 struct agp_gatt *gatt;
52 agp_ali_match(device_t dev)
54 if (pci_get_class(dev) != PCIC_BRIDGE
55 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
58 if (agp_find_caps(dev) == 0)
61 switch (pci_get_devid(dev)) {
63 return ("Ali M1671 host to AGP bridge");
65 return ("Ali M1541 host to AGP bridge");
67 return ("Ali M1621 host to AGP bridge");
74 agp_ali_probe(device_t dev)
78 if (resource_disabled("agp", device_get_unit(dev)))
80 desc = agp_ali_match(dev);
83 device_set_desc(dev, desc);
84 return BUS_PROBE_DEFAULT;
91 agp_ali_attach(device_t dev)
93 struct agp_ali_softc *sc = device_get_softc(dev);
94 struct agp_gatt *gatt;
98 error = agp_generic_attach(dev);
102 sc->initial_aperture = AGP_GET_APERTURE(dev);
103 if (sc->initial_aperture == 0) {
104 device_printf(dev, "bad initial aperture size, disabling\n");
105 agp_generic_detach(dev);
110 gatt = agp_alloc_gatt(dev);
115 * Probably contigmalloc failure. Try reducing the
116 * aperture so that the gatt size reduces.
118 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
119 agp_generic_detach(dev);
125 /* Install the gatt. */
126 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
127 pci_write_config(dev, AGP_ALI_ATTBASE, gatt->ag_physical |
128 (attbase & 0xfff), 4);
130 /* Enable the TLB. */
131 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
137 agp_ali_detach(device_t dev)
139 struct agp_ali_softc *sc = device_get_softc(dev);
144 /* Disable the TLB.. */
145 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
147 /* Put the aperture back the way it started. */
148 AGP_SET_APERTURE(dev, sc->initial_aperture);
149 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
150 pci_write_config(dev, AGP_ALI_ATTBASE, attbase & 0xfff, 4);
152 agp_free_gatt(sc->gatt);
159 static u_int32_t agp_ali_table[] = {
163 4*M, /* 3 - invalid */
164 8*M, /* 4 - invalid */
166 16*M, /* 6 - invalid */
167 32*M, /* 7 - invalid */
168 64*M, /* 8 - invalid */
169 128*M, /* 9 - invalid */
170 256*M, /* 10 - invalid */
172 #define agp_ali_table_size NELEM(agp_ali_table)
175 agp_ali_get_aperture(device_t dev)
178 * The aperture size is derived from the low bits of attbase.
179 * I'm not sure this is correct..
181 int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xf;
182 if (i >= agp_ali_table_size)
184 return agp_ali_table[i];
188 agp_ali_set_aperture(device_t dev, u_int32_t aperture)
193 for (i = 0; i < agp_ali_table_size; i++)
194 if (agp_ali_table[i] == aperture)
196 if (i == agp_ali_table_size)
199 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
200 pci_write_config(dev, AGP_ALI_ATTBASE, (attbase & ~0xf) | i, 4);
205 agp_ali_bind_page(device_t dev, int offset, vm_offset_t physical)
207 struct agp_ali_softc *sc = device_get_softc(dev);
209 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
212 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
217 agp_ali_unbind_page(device_t dev, int offset)
219 struct agp_ali_softc *sc = device_get_softc(dev);
221 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
224 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
229 agp_ali_flush_tlb(device_t dev)
231 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
232 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
235 static device_method_t agp_ali_methods[] = {
236 /* Device interface */
237 DEVMETHOD(device_probe, agp_ali_probe),
238 DEVMETHOD(device_attach, agp_ali_attach),
239 DEVMETHOD(device_detach, agp_ali_detach),
240 DEVMETHOD(device_shutdown, bus_generic_shutdown),
241 DEVMETHOD(device_suspend, bus_generic_suspend),
242 DEVMETHOD(device_resume, bus_generic_resume),
245 DEVMETHOD(agp_get_aperture, agp_ali_get_aperture),
246 DEVMETHOD(agp_set_aperture, agp_ali_set_aperture),
247 DEVMETHOD(agp_bind_page, agp_ali_bind_page),
248 DEVMETHOD(agp_unbind_page, agp_ali_unbind_page),
249 DEVMETHOD(agp_flush_tlb, agp_ali_flush_tlb),
250 DEVMETHOD(agp_enable, agp_generic_enable),
251 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
252 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
253 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
254 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
259 static driver_t agp_ali_driver = {
262 sizeof(struct agp_ali_softc),
265 static devclass_t agp_devclass;
267 DRIVER_MODULE(agp_ali, pci, agp_ali_driver, agp_devclass, NULL, NULL);
268 MODULE_DEPEND(agp_ali, agp, 1, 1, 1);
269 MODULE_DEPEND(agp_ali, pci, 1, 1, 1);