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.
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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
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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
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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 1.18 2005/12/20 21:12:26 jhb Exp $
27 * $DragonFly: src/sys/dev/agp/agp_ali.c,v 1.6 2007/09/12 08:31:43 hasso Exp $
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/malloc.h>
35 #include <sys/kernel.h>
39 #include <bus/pci/pcivar.h>
40 #include <bus/pci/pcireg.h>
45 #include <vm/vm_object.h>
48 struct agp_ali_softc {
50 u_int32_t initial_aperture; /* aperture size at startup */
51 struct agp_gatt *gatt;
55 agp_ali_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 ("Ali M1671 host to AGP bridge");
68 return ("Ali M1541 host to AGP bridge");
70 return ("Ali M1621 host to AGP bridge");
77 agp_ali_probe(device_t dev)
81 if (resource_disabled("agp", device_get_unit(dev)))
83 desc = agp_ali_match(dev);
86 device_set_desc(dev, desc);
87 return BUS_PROBE_DEFAULT;
94 agp_ali_attach(device_t dev)
96 struct agp_ali_softc *sc = device_get_softc(dev);
97 struct agp_gatt *gatt;
101 error = agp_generic_attach(dev);
105 sc->initial_aperture = AGP_GET_APERTURE(dev);
106 if (sc->initial_aperture == 0) {
107 device_printf(dev, "bad initial aperture size, disabling\n");
108 agp_generic_detach(dev);
113 gatt = agp_alloc_gatt(dev);
118 * Probably contigmalloc failure. Try reducing the
119 * aperture so that the gatt size reduces.
121 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
122 agp_generic_detach(dev);
128 /* Install the gatt. */
129 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
130 pci_write_config(dev, AGP_ALI_ATTBASE, gatt->ag_physical |
131 (attbase & 0xfff), 4);
133 /* Enable the TLB. */
134 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
140 agp_ali_detach(device_t dev)
142 struct agp_ali_softc *sc = device_get_softc(dev);
146 error = agp_generic_detach(dev);
150 /* Disable the TLB.. */
151 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
153 /* Put the aperture back the way it started. */
154 AGP_SET_APERTURE(dev, sc->initial_aperture);
155 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
156 pci_write_config(dev, AGP_ALI_ATTBASE, attbase & 0xfff, 4);
158 agp_free_gatt(sc->gatt);
164 static u_int32_t agp_ali_table[] = {
168 4*M, /* 3 - invalid */
169 8*M, /* 4 - invalid */
171 16*M, /* 6 - invalid */
172 32*M, /* 7 - invalid */
173 64*M, /* 8 - invalid */
174 128*M, /* 9 - invalid */
175 256*M, /* 10 - invalid */
177 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0]))
180 agp_ali_get_aperture(device_t dev)
183 * The aperture size is derived from the low bits of attbase.
184 * I'm not sure this is correct..
186 int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xf;
187 if (i >= agp_ali_table_size)
189 return agp_ali_table[i];
193 agp_ali_set_aperture(device_t dev, u_int32_t aperture)
198 for (i = 0; i < agp_ali_table_size; i++)
199 if (agp_ali_table[i] == aperture)
201 if (i == agp_ali_table_size)
204 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
205 pci_write_config(dev, AGP_ALI_ATTBASE, (attbase & ~0xf) | i, 4);
210 agp_ali_bind_page(device_t dev, int offset, vm_offset_t physical)
212 struct agp_ali_softc *sc = device_get_softc(dev);
214 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
217 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
222 agp_ali_unbind_page(device_t dev, int offset)
224 struct agp_ali_softc *sc = device_get_softc(dev);
226 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
229 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
234 agp_ali_flush_tlb(device_t dev)
236 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
237 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
240 static device_method_t agp_ali_methods[] = {
241 /* Device interface */
242 DEVMETHOD(device_probe, agp_ali_probe),
243 DEVMETHOD(device_attach, agp_ali_attach),
244 DEVMETHOD(device_detach, agp_ali_detach),
245 DEVMETHOD(device_shutdown, bus_generic_shutdown),
246 DEVMETHOD(device_suspend, bus_generic_suspend),
247 DEVMETHOD(device_resume, bus_generic_resume),
250 DEVMETHOD(agp_get_aperture, agp_ali_get_aperture),
251 DEVMETHOD(agp_set_aperture, agp_ali_set_aperture),
252 DEVMETHOD(agp_bind_page, agp_ali_bind_page),
253 DEVMETHOD(agp_unbind_page, agp_ali_unbind_page),
254 DEVMETHOD(agp_flush_tlb, agp_ali_flush_tlb),
255 DEVMETHOD(agp_enable, agp_generic_enable),
256 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
257 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
258 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
259 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
264 static driver_t agp_ali_driver = {
267 sizeof(struct agp_ali_softc),
270 static devclass_t agp_devclass;
272 DRIVER_MODULE(agp_ali, pci, agp_ali_driver, agp_devclass, 0, 0);
273 MODULE_DEPEND(agp_ali, agp, 1, 1, 1);
274 MODULE_DEPEND(agp_ali, pci, 1, 1, 1);