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>
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38#include <sys/mutex.h>
39#include <sys/proc.h>
40
41#include <dev/pci/pcivar.h>
42#include <dev/pci/pcireg.h>
43#include <pci/agppriv.h>
44#include <pci/agpreg.h>
45
46#include <vm/vm.h>
47#include <vm/vm_object.h>
48#include <vm/pmap.h>
49
50struct agp_sis_softc {
51 struct agp_softc agp;
52 u_int32_t initial_aperture; /* aperture size at startup */
53 struct agp_gatt *gatt;
54};
55
56static const char*
57agp_sis_match(device_t dev)
58{
59 if (pci_get_class(dev) != PCIC_BRIDGE
60 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
61 return NULL;
62
63 if (agp_find_caps(dev) == 0)
64 return NULL;
65
66 switch (pci_get_devid(dev)) {
67 case 0x00011039:
68 return ("SiS 5591 host to AGP bridge");
69 case 0x05301039:
70 return ("SiS 530 host to AGP bridge");
71 case 0x05401039:
72 return ("SiS 540 host to AGP bridge");
73 case 0x05501039:
74 return ("SiS 550 host to AGP bridge");
75 case 0x06201039:
76 return ("SiS 620 host to AGP bridge");
77 case 0x06301039:
78 return ("SiS 630 host to AGP bridge");
79 case 0x06451039:
80 return ("SiS 645 host to AGP bridge");
81 case 0x06461039:
82 return ("SiS 645DX host to AGP bridge");
83 case 0x06481039:
84 return ("SiS 648 host to AGP bridge");
85 case 0x06501039:
86 return ("SiS 650 host to AGP bridge");
87 case 0x06511039:
88 return ("SiS 651 host to AGP bridge");
89 case 0x06551039:
90 return ("SiS 655 host to AGP bridge");
91 case 0x06611039:
92 return ("SiS 661 host to AGP bridge");
93 case 0x07301039:
94 return ("SiS 730 host to AGP bridge");
95 case 0x07351039:
96 return ("SiS 735 host to AGP bridge");
97 case 0x07401039:
98 return ("SiS 740 host to AGP bridge");
99 case 0x07411039:
100 return ("SiS 741 host to AGP bridge");
101 case 0x07451039:
102 return ("SiS 745 host to AGP bridge");
103 case 0x07461039:
104 return ("SiS 746 host to AGP bridge");
105 case 0x07601039:
106 return ("SiS 760 host to AGP bridge");
107 };
108
109 if (pci_get_vendor(dev) == 0x1039)
110 return ("SIS Generic host to PCI bridge");
111
112 return NULL;
113}
114
115static int
116agp_sis_probe(device_t dev)
117{
118 const char *desc;
119
120 if (resource_disabled("agp", device_get_unit(dev)))
121 return (ENXIO);
122 desc = agp_sis_match(dev);
123 if (desc) {
124 device_verbose(dev);
125 device_set_desc(dev, desc);
126 return 0;
127 }
128
129 return ENXIO;
130}
131
132static int
133agp_sis_attach(device_t dev)
134{
135 struct agp_sis_softc *sc = device_get_softc(dev);
136 struct agp_gatt *gatt;
137 int error;
138
139 error = agp_generic_attach(dev);
140 if (error)
141 return error;
142
143 sc->initial_aperture = AGP_GET_APERTURE(dev);
144
145 for (;;) {
146 gatt = agp_alloc_gatt(dev);
147 if (gatt)
148 break;
149
150 /*
151 * Probably contigmalloc failure. Try reducing the
152 * aperture so that the gatt size reduces.
153 */
154 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
155 agp_generic_detach(dev);
156 return ENOMEM;
157 }
158 }
159 sc->gatt = gatt;
160
161 /* Install the gatt. */
162 pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4);
163
164 /* Enable the aperture. */
165 pci_write_config(dev, AGP_SIS_WINCTRL,
166 pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1);
167
168 /*
169 * Enable the TLB and make it automatically invalidate entries
170 * when the GATT is written.
171 */
172 pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1);
173
174 return 0;
175}
176
177static int
178agp_sis_detach(device_t dev)
179{
180 struct agp_sis_softc *sc = device_get_softc(dev);
181 int error;
182
183 error = agp_generic_detach(dev);
184 if (error)
185 return error;
186
187 /* Disable the aperture.. */
188 pci_write_config(dev, AGP_SIS_WINCTRL,
189 pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1);
190
191 /* and the TLB. */
192 pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1);
193
194 /* Put the aperture back the way it started. */
195 AGP_SET_APERTURE(dev, sc->initial_aperture);
196
197 agp_free_gatt(sc->gatt);
198 return 0;
199}
200
201static u_int32_t
202agp_sis_get_aperture(device_t dev)
203{
204 int gws;
205
206 /*
207 * The aperture size is equal to 4M<<gws.
208 */
209 gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4;
210 return (4*1024*1024) << gws;
211}
212
213static int
214agp_sis_set_aperture(device_t dev, u_int32_t aperture)
215{
216 int gws;
217
218 /*
219 * Check for a power of two and make sure its within the
220 * programmable range.
221 */
222 if (aperture & (aperture - 1)
223 || aperture < 4*1024*1024
224 || aperture > 256*1024*1024)
225 return EINVAL;
226
227 gws = ffs(aperture / 4*1024*1024) - 1;
228
229 pci_write_config(dev, AGP_SIS_WINCTRL,
230 ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70)
231 | gws << 4), 1);
232
233 return 0;
234}
235
236static int
237agp_sis_bind_page(device_t dev, int offset, vm_offset_t physical)
238{
239 struct agp_sis_softc *sc = device_get_softc(dev);
240
241 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
242 return EINVAL;
243
244 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
245 return 0;
246}
247
248static int
249agp_sis_unbind_page(device_t dev, int offset)
250{
251 struct agp_sis_softc *sc = device_get_softc(dev);
252
253 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
254 return EINVAL;
255
256 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
257 return 0;
258}
259
260static void
261agp_sis_flush_tlb(device_t dev)
262{
263 pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1);
264}
265
266static device_method_t agp_sis_methods[] = {
267 /* Device interface */
268 DEVMETHOD(device_probe, agp_sis_probe),
269 DEVMETHOD(device_attach, agp_sis_attach),
270 DEVMETHOD(device_detach, agp_sis_detach),
271 DEVMETHOD(device_shutdown, bus_generic_shutdown),
272 DEVMETHOD(device_suspend, bus_generic_suspend),
273 DEVMETHOD(device_resume, bus_generic_resume),
274
275 /* AGP interface */
276 DEVMETHOD(agp_get_aperture, agp_sis_get_aperture),
277 DEVMETHOD(agp_set_aperture, agp_sis_set_aperture),
278 DEVMETHOD(agp_bind_page, agp_sis_bind_page),
279 DEVMETHOD(agp_unbind_page, agp_sis_unbind_page),
280 DEVMETHOD(agp_flush_tlb, agp_sis_flush_tlb),
281 DEVMETHOD(agp_enable, agp_generic_enable),
282 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
283 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
284 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
285 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
286
287 { 0, 0 }
288};
289
290static driver_t agp_sis_driver = {
291 "agp",
292 agp_sis_methods,
293 sizeof(struct agp_sis_softc),
294};
295
296static devclass_t agp_devclass;
297
298DRIVER_MODULE(agp_sis, pci, agp_sis_driver, agp_devclass, 0, 0);
299MODULE_DEPEND(agp_sis, agp, 1, 1, 1);
300MODULE_DEPEND(agp_sis, pci, 1, 1, 1);
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