FreeBSD/Linux Kernel Cross Reference
sys/pci/agp_sis.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/6.2/sys/pci/agp_sis.c 159295 2006-06-05 18:34:13Z jkim $");
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_sis_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_sis_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 0x00011039:
69 return ("SiS 5591 host to AGP bridge");
70 case 0x05301039:
71 return ("SiS 530 host to AGP bridge");
72 case 0x05401039:
73 return ("SiS 540 host to AGP bridge");
74 case 0x05501039:
75 return ("SiS 550 host to AGP bridge");
76 case 0x06201039:
77 return ("SiS 620 host to AGP bridge");
78 case 0x06301039:
79 return ("SiS 630 host to AGP bridge");
80 case 0x06451039:
81 return ("SiS 645 host to AGP bridge");
82 case 0x06461039:
83 return ("SiS 645DX host to AGP bridge");
84 case 0x06481039:
85 return ("SiS 648 host to AGP bridge");
86 case 0x06501039:
87 return ("SiS 650 host to AGP bridge");
88 case 0x06511039:
89 return ("SiS 651 host to AGP bridge");
90 case 0x06551039:
91 return ("SiS 655 host to AGP bridge");
92 case 0x06611039:
93 return ("SiS 661 host to AGP bridge");
94 case 0x07301039:
95 return ("SiS 730 host to AGP bridge");
96 case 0x07351039:
97 return ("SiS 735 host to AGP bridge");
98 case 0x07401039:
99 return ("SiS 740 host to AGP bridge");
100 case 0x07411039:
101 return ("SiS 741 host to AGP bridge");
102 case 0x07451039:
103 return ("SiS 745 host to AGP bridge");
104 case 0x07461039:
105 return ("SiS 746 host to AGP bridge");
106 };
107
108 return NULL;
109 }
110
111 static int
112 agp_sis_probe(device_t dev)
113 {
114 const char *desc;
115
116 if (resource_disabled("agp", device_get_unit(dev)))
117 return (ENXIO);
118 desc = agp_sis_match(dev);
119 if (desc) {
120 device_verbose(dev);
121 device_set_desc(dev, desc);
122 return BUS_PROBE_DEFAULT;
123 }
124
125 return ENXIO;
126 }
127
128 static int
129 agp_sis_attach(device_t dev)
130 {
131 struct agp_sis_softc *sc = device_get_softc(dev);
132 struct agp_gatt *gatt;
133 int error;
134
135 error = agp_generic_attach(dev);
136 if (error)
137 return error;
138
139 sc->initial_aperture = AGP_GET_APERTURE(dev);
140
141 for (;;) {
142 gatt = agp_alloc_gatt(dev);
143 if (gatt)
144 break;
145
146 /*
147 * Probably contigmalloc failure. Try reducing the
148 * aperture so that the gatt size reduces.
149 */
150 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
151 agp_generic_detach(dev);
152 return ENOMEM;
153 }
154 }
155 sc->gatt = gatt;
156
157 /* Install the gatt. */
158 pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4);
159
160 /* Enable the aperture. */
161 pci_write_config(dev, AGP_SIS_WINCTRL,
162 pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1);
163
164 /*
165 * Enable the TLB and make it automatically invalidate entries
166 * when the GATT is written.
167 */
168 pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1);
169
170 return 0;
171 }
172
173 static int
174 agp_sis_detach(device_t dev)
175 {
176 struct agp_sis_softc *sc = device_get_softc(dev);
177 int error;
178
179 error = agp_generic_detach(dev);
180 if (error)
181 return error;
182
183 /* Disable the aperture.. */
184 pci_write_config(dev, AGP_SIS_WINCTRL,
185 pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1);
186
187 /* and the TLB. */
188 pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1);
189
190 /* Put the aperture back the way it started. */
191 AGP_SET_APERTURE(dev, sc->initial_aperture);
192
193 agp_free_gatt(sc->gatt);
194 return 0;
195 }
196
197 static u_int32_t
198 agp_sis_get_aperture(device_t dev)
199 {
200 int gws;
201
202 /*
203 * The aperture size is equal to 4M<<gws.
204 */
205 gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4;
206 return (4*1024*1024) << gws;
207 }
208
209 static int
210 agp_sis_set_aperture(device_t dev, u_int32_t aperture)
211 {
212 int gws;
213
214 /*
215 * Check for a power of two and make sure its within the
216 * programmable range.
217 */
218 if (aperture & (aperture - 1)
219 || aperture < 4*1024*1024
220 || aperture > 256*1024*1024)
221 return EINVAL;
222
223 gws = ffs(aperture / 4*1024*1024) - 1;
224
225 pci_write_config(dev, AGP_SIS_WINCTRL,
226 ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70)
227 | gws << 4), 1);
228
229 return 0;
230 }
231
232 static int
233 agp_sis_bind_page(device_t dev, int offset, vm_offset_t physical)
234 {
235 struct agp_sis_softc *sc = device_get_softc(dev);
236
237 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
238 return EINVAL;
239
240 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
241 return 0;
242 }
243
244 static int
245 agp_sis_unbind_page(device_t dev, int offset)
246 {
247 struct agp_sis_softc *sc = device_get_softc(dev);
248
249 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
250 return EINVAL;
251
252 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
253 return 0;
254 }
255
256 static void
257 agp_sis_flush_tlb(device_t dev)
258 {
259 pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1);
260 }
261
262 static device_method_t agp_sis_methods[] = {
263 /* Device interface */
264 DEVMETHOD(device_probe, agp_sis_probe),
265 DEVMETHOD(device_attach, agp_sis_attach),
266 DEVMETHOD(device_detach, agp_sis_detach),
267 DEVMETHOD(device_shutdown, bus_generic_shutdown),
268 DEVMETHOD(device_suspend, bus_generic_suspend),
269 DEVMETHOD(device_resume, bus_generic_resume),
270
271 /* AGP interface */
272 DEVMETHOD(agp_get_aperture, agp_sis_get_aperture),
273 DEVMETHOD(agp_set_aperture, agp_sis_set_aperture),
274 DEVMETHOD(agp_bind_page, agp_sis_bind_page),
275 DEVMETHOD(agp_unbind_page, agp_sis_unbind_page),
276 DEVMETHOD(agp_flush_tlb, agp_sis_flush_tlb),
277 DEVMETHOD(agp_enable, agp_generic_enable),
278 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
279 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
280 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
281 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
282
283 { 0, 0 }
284 };
285
286 static driver_t agp_sis_driver = {
287 "agp",
288 agp_sis_methods,
289 sizeof(struct agp_sis_softc),
290 };
291
292 static devclass_t agp_devclass;
293
294 DRIVER_MODULE(agp_sis, pci, agp_sis_driver, agp_devclass, 0, 0);
295 MODULE_DEPEND(agp_sis, agp, 1, 1, 1);
296 MODULE_DEPEND(agp_sis, pci, 1, 1, 1);
Cache object: acb21ebef9124188b24f880e18330146
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