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/6.0/sys/pci/agp_sis.c 142398 2005-02-24 21:32:56Z imp $");
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 case 0x07601039:
107 return ("SiS 760 host to AGP bridge");
108 };
109
110 return NULL;
111 }
112
113 static int
114 agp_sis_probe(device_t dev)
115 {
116 const char *desc;
117
118 if (resource_disabled("agp", device_get_unit(dev)))
119 return (ENXIO);
120 desc = agp_sis_match(dev);
121 if (desc) {
122 device_verbose(dev);
123 device_set_desc(dev, desc);
124 return BUS_PROBE_DEFAULT;
125 }
126
127 return ENXIO;
128 }
129
130 static int
131 agp_sis_attach(device_t dev)
132 {
133 struct agp_sis_softc *sc = device_get_softc(dev);
134 struct agp_gatt *gatt;
135 int error;
136
137 error = agp_generic_attach(dev);
138 if (error)
139 return error;
140
141 sc->initial_aperture = AGP_GET_APERTURE(dev);
142
143 for (;;) {
144 gatt = agp_alloc_gatt(dev);
145 if (gatt)
146 break;
147
148 /*
149 * Probably contigmalloc failure. Try reducing the
150 * aperture so that the gatt size reduces.
151 */
152 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
153 agp_generic_detach(dev);
154 return ENOMEM;
155 }
156 }
157 sc->gatt = gatt;
158
159 /* Install the gatt. */
160 pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4);
161
162 /* Enable the aperture. */
163 pci_write_config(dev, AGP_SIS_WINCTRL,
164 pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1);
165
166 /*
167 * Enable the TLB and make it automatically invalidate entries
168 * when the GATT is written.
169 */
170 pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1);
171
172 return 0;
173 }
174
175 static int
176 agp_sis_detach(device_t dev)
177 {
178 struct agp_sis_softc *sc = device_get_softc(dev);
179 int error;
180
181 error = agp_generic_detach(dev);
182 if (error)
183 return error;
184
185 /* Disable the aperture.. */
186 pci_write_config(dev, AGP_SIS_WINCTRL,
187 pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1);
188
189 /* and the TLB. */
190 pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1);
191
192 /* Put the aperture back the way it started. */
193 AGP_SET_APERTURE(dev, sc->initial_aperture);
194
195 agp_free_gatt(sc->gatt);
196 return 0;
197 }
198
199 static u_int32_t
200 agp_sis_get_aperture(device_t dev)
201 {
202 int gws;
203
204 /*
205 * The aperture size is equal to 4M<<gws.
206 */
207 gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4;
208 return (4*1024*1024) << gws;
209 }
210
211 static int
212 agp_sis_set_aperture(device_t dev, u_int32_t aperture)
213 {
214 int gws;
215
216 /*
217 * Check for a power of two and make sure its within the
218 * programmable range.
219 */
220 if (aperture & (aperture - 1)
221 || aperture < 4*1024*1024
222 || aperture > 256*1024*1024)
223 return EINVAL;
224
225 gws = ffs(aperture / 4*1024*1024) - 1;
226
227 pci_write_config(dev, AGP_SIS_WINCTRL,
228 ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70)
229 | gws << 4), 1);
230
231 return 0;
232 }
233
234 static int
235 agp_sis_bind_page(device_t dev, int offset, vm_offset_t physical)
236 {
237 struct agp_sis_softc *sc = device_get_softc(dev);
238
239 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
240 return EINVAL;
241
242 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
243 return 0;
244 }
245
246 static int
247 agp_sis_unbind_page(device_t dev, int offset)
248 {
249 struct agp_sis_softc *sc = device_get_softc(dev);
250
251 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
252 return EINVAL;
253
254 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
255 return 0;
256 }
257
258 static void
259 agp_sis_flush_tlb(device_t dev)
260 {
261 pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1);
262 }
263
264 static device_method_t agp_sis_methods[] = {
265 /* Device interface */
266 DEVMETHOD(device_probe, agp_sis_probe),
267 DEVMETHOD(device_attach, agp_sis_attach),
268 DEVMETHOD(device_detach, agp_sis_detach),
269 DEVMETHOD(device_shutdown, bus_generic_shutdown),
270 DEVMETHOD(device_suspend, bus_generic_suspend),
271 DEVMETHOD(device_resume, bus_generic_resume),
272
273 /* AGP interface */
274 DEVMETHOD(agp_get_aperture, agp_sis_get_aperture),
275 DEVMETHOD(agp_set_aperture, agp_sis_set_aperture),
276 DEVMETHOD(agp_bind_page, agp_sis_bind_page),
277 DEVMETHOD(agp_unbind_page, agp_sis_unbind_page),
278 DEVMETHOD(agp_flush_tlb, agp_sis_flush_tlb),
279 DEVMETHOD(agp_enable, agp_generic_enable),
280 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
281 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
282 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
283 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
284
285 { 0, 0 }
286 };
287
288 static driver_t agp_sis_driver = {
289 "agp",
290 agp_sis_methods,
291 sizeof(struct agp_sis_softc),
292 };
293
294 static devclass_t agp_devclass;
295
296 DRIVER_MODULE(agp_sis, pci, agp_sis_driver, agp_devclass, 0, 0);
297 MODULE_DEPEND(agp_sis, agp, 1, 1, 1);
298 MODULE_DEPEND(agp_sis, pci, 1, 1, 1);
Cache object: 9184aa1f9581c9893c4be8bfba007d0a
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