FreeBSD/Linux Kernel Cross Reference
sys/pci/agp_ali.c
1 /*-
2 * Copyright (c) 2000 Doug Rabson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
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
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: releng/6.1/sys/pci/agp_ali.c 142646 2005-02-27 13:05:34Z cognet $");
29
30 #include "opt_bus.h"
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/malloc.h>
35 #include <sys/kernel.h>
36 #include <sys/module.h>
37 #include <sys/bus.h>
38 #include <sys/lock.h>
39 #include <sys/mutex.h>
40 #include <sys/proc.h>
41
42 #include <dev/pci/pcivar.h>
43 #include <dev/pci/pcireg.h>
44 #include <pci/agppriv.h>
45 #include <pci/agpreg.h>
46
47 #include <vm/vm.h>
48 #include <vm/vm_object.h>
49 #include <vm/pmap.h>
50
51 struct agp_ali_softc {
52 struct agp_softc agp;
53 u_int32_t initial_aperture; /* aperture size at startup */
54 struct agp_gatt *gatt;
55 };
56
57 static const char*
58 agp_ali_match(device_t dev)
59 {
60 if (pci_get_class(dev) != PCIC_BRIDGE
61 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
62 return NULL;
63
64 if (agp_find_caps(dev) == 0)
65 return NULL;
66
67 switch (pci_get_devid(dev)) {
68 case 0x167110b9:
69 return ("Ali M1671 host to AGP bridge");
70 case 0x154110b9:
71 return ("Ali M1541 host to AGP bridge");
72 case 0x162110b9:
73 return ("Ali M1621 host to AGP bridge");
74 };
75
76 return NULL;
77 }
78
79 static int
80 agp_ali_probe(device_t dev)
81 {
82 const char *desc;
83
84 if (resource_disabled("agp", device_get_unit(dev)))
85 return (ENXIO);
86 desc = agp_ali_match(dev);
87 if (desc) {
88 device_verbose(dev);
89 device_set_desc(dev, desc);
90 return BUS_PROBE_DEFAULT;
91 }
92
93 return ENXIO;
94 }
95
96 static int
97 agp_ali_attach(device_t dev)
98 {
99 struct agp_ali_softc *sc = device_get_softc(dev);
100 struct agp_gatt *gatt;
101 int error;
102 u_int32_t attbase;
103
104 error = agp_generic_attach(dev);
105 if (error)
106 return error;
107
108 sc->initial_aperture = AGP_GET_APERTURE(dev);
109 if (sc->initial_aperture == 0) {
110 device_printf(dev, "bad initial aperture size, disabling\n");
111 return ENXIO;
112 }
113
114 for (;;) {
115 gatt = agp_alloc_gatt(dev);
116 if (gatt)
117 break;
118
119 /*
120 * Probably contigmalloc failure. Try reducing the
121 * aperture so that the gatt size reduces.
122 */
123 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
124 agp_generic_detach(dev);
125 return ENOMEM;
126 }
127 }
128 sc->gatt = gatt;
129
130 /* Install the gatt. */
131 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
132 pci_write_config(dev, AGP_ALI_ATTBASE, gatt->ag_physical |
133 (attbase & 0xfff), 4);
134
135 /* Enable the TLB. */
136 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
137
138 return 0;
139 }
140
141 static int
142 agp_ali_detach(device_t dev)
143 {
144 struct agp_ali_softc *sc = device_get_softc(dev);
145 int error;
146 u_int32_t attbase;
147
148 error = agp_generic_detach(dev);
149 if (error)
150 return error;
151
152 /* Disable the TLB.. */
153 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
154
155 /* Put the aperture back the way it started. */
156 AGP_SET_APERTURE(dev, sc->initial_aperture);
157 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
158 pci_write_config(dev, AGP_ALI_ATTBASE, attbase & 0xfff, 4);
159
160 agp_free_gatt(sc->gatt);
161 return 0;
162 }
163
164 #define M 1024*1024
165
166 static u_int32_t agp_ali_table[] = {
167 0, /* 0 - invalid */
168 1, /* 1 - invalid */
169 2, /* 2 - invalid */
170 4*M, /* 3 - invalid */
171 8*M, /* 4 - invalid */
172 0, /* 5 - invalid */
173 16*M, /* 6 - invalid */
174 32*M, /* 7 - invalid */
175 64*M, /* 8 - invalid */
176 128*M, /* 9 - invalid */
177 256*M, /* 10 - invalid */
178 };
179 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0]))
180
181 static u_int32_t
182 agp_ali_get_aperture(device_t dev)
183 {
184 /*
185 * The aperture size is derived from the low bits of attbase.
186 * I'm not sure this is correct..
187 */
188 int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xf;
189 if (i >= agp_ali_table_size)
190 return 0;
191 return agp_ali_table[i];
192 }
193
194 static int
195 agp_ali_set_aperture(device_t dev, u_int32_t aperture)
196 {
197 int i;
198 u_int32_t attbase;
199
200 for (i = 0; i < agp_ali_table_size; i++)
201 if (agp_ali_table[i] == aperture)
202 break;
203 if (i == agp_ali_table_size)
204 return EINVAL;
205
206 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
207 pci_write_config(dev, AGP_ALI_ATTBASE, (attbase & ~0xf) | i, 4);
208 return 0;
209 }
210
211 static int
212 agp_ali_bind_page(device_t dev, int offset, vm_offset_t physical)
213 {
214 struct agp_ali_softc *sc = device_get_softc(dev);
215
216 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
217 return EINVAL;
218
219 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
220 return 0;
221 }
222
223 static int
224 agp_ali_unbind_page(device_t dev, int offset)
225 {
226 struct agp_ali_softc *sc = device_get_softc(dev);
227
228 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
229 return EINVAL;
230
231 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
232 return 0;
233 }
234
235 static void
236 agp_ali_flush_tlb(device_t dev)
237 {
238 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
239 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
240 }
241
242 static device_method_t agp_ali_methods[] = {
243 /* Device interface */
244 DEVMETHOD(device_probe, agp_ali_probe),
245 DEVMETHOD(device_attach, agp_ali_attach),
246 DEVMETHOD(device_detach, agp_ali_detach),
247 DEVMETHOD(device_shutdown, bus_generic_shutdown),
248 DEVMETHOD(device_suspend, bus_generic_suspend),
249 DEVMETHOD(device_resume, bus_generic_resume),
250
251 /* AGP interface */
252 DEVMETHOD(agp_get_aperture, agp_ali_get_aperture),
253 DEVMETHOD(agp_set_aperture, agp_ali_set_aperture),
254 DEVMETHOD(agp_bind_page, agp_ali_bind_page),
255 DEVMETHOD(agp_unbind_page, agp_ali_unbind_page),
256 DEVMETHOD(agp_flush_tlb, agp_ali_flush_tlb),
257 DEVMETHOD(agp_enable, agp_generic_enable),
258 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
259 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
260 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
261 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
262
263 { 0, 0 }
264 };
265
266 static driver_t agp_ali_driver = {
267 "agp",
268 agp_ali_methods,
269 sizeof(struct agp_ali_softc),
270 };
271
272 static devclass_t agp_devclass;
273
274 DRIVER_MODULE(agp_ali, pci, agp_ali_driver, agp_devclass, 0, 0);
275 MODULE_DEPEND(agp_ali, agp, 1, 1, 1);
276 MODULE_DEPEND(agp_ali, pci, 1, 1, 1);
Cache object: 63e9dcb96873f937e5832a8c491f73b8
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