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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: releng/10.3/sys/dev/agp/agp_ali.c 244926 2013-01-01 18:16:49Z antoine $");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/malloc.h>
33 #include <sys/kernel.h>
34 #include <sys/module.h>
35 #include <sys/bus.h>
36 #include <sys/lock.h>
37 #include <sys/mutex.h>
38 #include <sys/proc.h>
39
40 #include <dev/agp/agppriv.h>
41 #include <dev/agp/agpreg.h>
42 #include <dev/pci/pcivar.h>
43 #include <dev/pci/pcireg.h>
44
45 #include <vm/vm.h>
46 #include <vm/vm_object.h>
47 #include <vm/pmap.h>
48
49 struct agp_ali_softc {
50 struct agp_softc agp;
51 u_int32_t initial_aperture; /* aperture size at startup */
52 struct agp_gatt *gatt;
53 };
54
55 static const char*
56 agp_ali_match(device_t dev)
57 {
58 if (pci_get_class(dev) != PCIC_BRIDGE
59 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
60 return NULL;
61
62 if (agp_find_caps(dev) == 0)
63 return NULL;
64
65 switch (pci_get_devid(dev)) {
66 case 0x167110b9:
67 return ("Ali M1671 host to AGP bridge");
68 case 0x154110b9:
69 return ("Ali M1541 host to AGP bridge");
70 case 0x162110b9:
71 return ("Ali M1621 host to AGP bridge");
72 }
73
74 return NULL;
75 }
76
77 static int
78 agp_ali_probe(device_t dev)
79 {
80 const char *desc;
81
82 if (resource_disabled("agp", device_get_unit(dev)))
83 return (ENXIO);
84 desc = agp_ali_match(dev);
85 if (desc) {
86 device_set_desc(dev, desc);
87 return BUS_PROBE_DEFAULT;
88 }
89
90 return ENXIO;
91 }
92
93 static int
94 agp_ali_attach(device_t dev)
95 {
96 struct agp_ali_softc *sc = device_get_softc(dev);
97 struct agp_gatt *gatt;
98 int error;
99 u_int32_t attbase;
100
101 error = agp_generic_attach(dev);
102 if (error)
103 return error;
104
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 return ENXIO;
109 }
110
111 for (;;) {
112 gatt = agp_alloc_gatt(dev);
113 if (gatt)
114 break;
115
116 /*
117 * Probably contigmalloc failure. Try reducing the
118 * aperture so that the gatt size reduces.
119 */
120 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
121 agp_generic_detach(dev);
122 return ENOMEM;
123 }
124 }
125 sc->gatt = gatt;
126
127 /* Install the gatt. */
128 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
129 pci_write_config(dev, AGP_ALI_ATTBASE, gatt->ag_physical |
130 (attbase & 0xfff), 4);
131
132 /* Enable the TLB. */
133 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
134
135 return 0;
136 }
137
138 static int
139 agp_ali_detach(device_t dev)
140 {
141 struct agp_ali_softc *sc = device_get_softc(dev);
142 u_int32_t attbase;
143
144 agp_free_cdev(dev);
145
146 /* Disable the TLB.. */
147 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
148
149 /* Put the aperture back the way it started. */
150 AGP_SET_APERTURE(dev, sc->initial_aperture);
151 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
152 pci_write_config(dev, AGP_ALI_ATTBASE, attbase & 0xfff, 4);
153
154 agp_free_gatt(sc->gatt);
155 agp_free_res(dev);
156 return 0;
157 }
158
159 #define M 1024*1024
160
161 static u_int32_t agp_ali_table[] = {
162 0, /* 0 - invalid */
163 1, /* 1 - invalid */
164 2, /* 2 - invalid */
165 4*M, /* 3 - invalid */
166 8*M, /* 4 - invalid */
167 0, /* 5 - invalid */
168 16*M, /* 6 - invalid */
169 32*M, /* 7 - invalid */
170 64*M, /* 8 - invalid */
171 128*M, /* 9 - invalid */
172 256*M, /* 10 - invalid */
173 };
174 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0]))
175
176 static u_int32_t
177 agp_ali_get_aperture(device_t dev)
178 {
179 /*
180 * The aperture size is derived from the low bits of attbase.
181 * I'm not sure this is correct..
182 */
183 int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xf;
184 if (i >= agp_ali_table_size)
185 return 0;
186 return agp_ali_table[i];
187 }
188
189 static int
190 agp_ali_set_aperture(device_t dev, u_int32_t aperture)
191 {
192 int i;
193 u_int32_t attbase;
194
195 for (i = 0; i < agp_ali_table_size; i++)
196 if (agp_ali_table[i] == aperture)
197 break;
198 if (i == agp_ali_table_size)
199 return EINVAL;
200
201 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
202 pci_write_config(dev, AGP_ALI_ATTBASE, (attbase & ~0xf) | i, 4);
203 return 0;
204 }
205
206 static int
207 agp_ali_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
208 {
209 struct agp_ali_softc *sc = device_get_softc(dev);
210
211 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
212 return EINVAL;
213
214 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
215 return 0;
216 }
217
218 static int
219 agp_ali_unbind_page(device_t dev, vm_offset_t offset)
220 {
221 struct agp_ali_softc *sc = device_get_softc(dev);
222
223 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
224 return EINVAL;
225
226 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
227 return 0;
228 }
229
230 static void
231 agp_ali_flush_tlb(device_t dev)
232 {
233 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
234 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
235 }
236
237 static device_method_t agp_ali_methods[] = {
238 /* Device interface */
239 DEVMETHOD(device_probe, agp_ali_probe),
240 DEVMETHOD(device_attach, agp_ali_attach),
241 DEVMETHOD(device_detach, agp_ali_detach),
242 DEVMETHOD(device_shutdown, bus_generic_shutdown),
243 DEVMETHOD(device_suspend, bus_generic_suspend),
244 DEVMETHOD(device_resume, bus_generic_resume),
245
246 /* AGP interface */
247 DEVMETHOD(agp_get_aperture, agp_ali_get_aperture),
248 DEVMETHOD(agp_set_aperture, agp_ali_set_aperture),
249 DEVMETHOD(agp_bind_page, agp_ali_bind_page),
250 DEVMETHOD(agp_unbind_page, agp_ali_unbind_page),
251 DEVMETHOD(agp_flush_tlb, agp_ali_flush_tlb),
252 DEVMETHOD(agp_enable, agp_generic_enable),
253 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
254 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
255 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
256 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
257
258 { 0, 0 }
259 };
260
261 static driver_t agp_ali_driver = {
262 "agp",
263 agp_ali_methods,
264 sizeof(struct agp_ali_softc),
265 };
266
267 static devclass_t agp_devclass;
268
269 DRIVER_MODULE(agp_ali, hostb, agp_ali_driver, agp_devclass, 0, 0);
270 MODULE_DEPEND(agp_ali, agp, 1, 1, 1);
271 MODULE_DEPEND(agp_ali, pci, 1, 1, 1);
Cache object: 67b40a523cf6f72f84eaae3ce1d47f25
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