FreeBSD/Linux Kernel Cross Reference
sys/dev/agp/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 * $FreeBSD: src/sys/dev/agp/agp_ali.c,v 1.20 2007/11/12 21:51:36 jhb Exp $
27 */
28
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/malloc.h>
32 #include <sys/kernel.h>
33 #include <sys/bus.h>
34 #include <sys/lock.h>
35
36 #include <bus/pci/pcivar.h>
37 #include <bus/pci/pcireg.h>
38 #include "agppriv.h"
39 #include "agpreg.h"
40
41 #include <vm/vm.h>
42 #include <vm/vm_object.h>
43 #include <vm/pmap.h>
44
45 struct agp_ali_softc {
46 struct agp_softc agp;
47 u_int32_t initial_aperture; /* aperture size at startup */
48 struct agp_gatt *gatt;
49 };
50
51 static const char*
52 agp_ali_match(device_t dev)
53 {
54 if (pci_get_class(dev) != PCIC_BRIDGE
55 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
56 return NULL;
57
58 if (agp_find_caps(dev) == 0)
59 return NULL;
60
61 switch (pci_get_devid(dev)) {
62 case 0x167110b9:
63 return ("Ali M1671 host to AGP bridge");
64 case 0x154110b9:
65 return ("Ali M1541 host to AGP bridge");
66 case 0x162110b9:
67 return ("Ali M1621 host to AGP bridge");
68 };
69
70 return NULL;
71 }
72
73 static int
74 agp_ali_probe(device_t dev)
75 {
76 const char *desc;
77
78 if (resource_disabled("agp", device_get_unit(dev)))
79 return (ENXIO);
80 desc = agp_ali_match(dev);
81 if (desc) {
82 device_verbose(dev);
83 device_set_desc(dev, desc);
84 return BUS_PROBE_DEFAULT;
85 }
86
87 return ENXIO;
88 }
89
90 static int
91 agp_ali_attach(device_t dev)
92 {
93 struct agp_ali_softc *sc = device_get_softc(dev);
94 struct agp_gatt *gatt;
95 int error;
96 u_int32_t attbase;
97
98 error = agp_generic_attach(dev);
99 if (error)
100 return error;
101
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);
106 return ENXIO;
107 }
108
109 for (;;) {
110 gatt = agp_alloc_gatt(dev);
111 if (gatt)
112 break;
113
114 /*
115 * Probably contigmalloc failure. Try reducing the
116 * aperture so that the gatt size reduces.
117 */
118 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
119 agp_generic_detach(dev);
120 return ENOMEM;
121 }
122 }
123 sc->gatt = gatt;
124
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);
129
130 /* Enable the TLB. */
131 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
132
133 return 0;
134 }
135
136 static int
137 agp_ali_detach(device_t dev)
138 {
139 struct agp_ali_softc *sc = device_get_softc(dev);
140 u_int32_t attbase;
141
142 agp_free_cdev(dev);
143
144 /* Disable the TLB.. */
145 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
146
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);
151
152 agp_free_gatt(sc->gatt);
153 agp_free_res(dev);
154 return 0;
155 }
156
157 #define M 1024*1024
158
159 static u_int32_t agp_ali_table[] = {
160 0, /* 0 - invalid */
161 1, /* 1 - invalid */
162 2, /* 2 - invalid */
163 4*M, /* 3 - invalid */
164 8*M, /* 4 - invalid */
165 0, /* 5 - 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 */
171 };
172 #define agp_ali_table_size NELEM(agp_ali_table)
173
174 static u_int32_t
175 agp_ali_get_aperture(device_t dev)
176 {
177 /*
178 * The aperture size is derived from the low bits of attbase.
179 * I'm not sure this is correct..
180 */
181 int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xf;
182 if (i >= agp_ali_table_size)
183 return 0;
184 return agp_ali_table[i];
185 }
186
187 static int
188 agp_ali_set_aperture(device_t dev, u_int32_t aperture)
189 {
190 int i;
191 u_int32_t attbase;
192
193 for (i = 0; i < agp_ali_table_size; i++)
194 if (agp_ali_table[i] == aperture)
195 break;
196 if (i == agp_ali_table_size)
197 return EINVAL;
198
199 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
200 pci_write_config(dev, AGP_ALI_ATTBASE, (attbase & ~0xf) | i, 4);
201 return 0;
202 }
203
204 static int
205 agp_ali_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
206 {
207 struct agp_ali_softc *sc = device_get_softc(dev);
208
209 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
210 return EINVAL;
211
212 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
213 return 0;
214 }
215
216 static int
217 agp_ali_unbind_page(device_t dev, vm_offset_t offset)
218 {
219 struct agp_ali_softc *sc = device_get_softc(dev);
220
221 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
222 return EINVAL;
223
224 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
225 return 0;
226 }
227
228 static void
229 agp_ali_flush_tlb(device_t dev)
230 {
231 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
232 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
233 }
234
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),
243
244 /* AGP interface */
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),
255
256 DEVMETHOD_END
257 };
258
259 static driver_t agp_ali_driver = {
260 "agp",
261 agp_ali_methods,
262 sizeof(struct agp_ali_softc),
263 };
264
265 static devclass_t agp_devclass;
266
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);
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