1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2000 Doug Rabson
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
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/module.h>
34 #include <sys/bus.h>
35 #include <sys/lock.h>
36 #include <sys/mutex.h>
37 #include <sys/proc.h>
38
39 #include <dev/agp/agppriv.h>
40 #include <dev/agp/agpreg.h>
41 #include <dev/pci/pcivar.h>
42 #include <dev/pci/pcireg.h>
43
44 #include <vm/vm.h>
45 #include <vm/vm_object.h>
46 #include <vm/pmap.h>
47
48 struct agp_sis_softc {
49 struct agp_softc agp;
50 u_int32_t initial_aperture; /* aperture size at startup */
51 struct agp_gatt *gatt;
52 };
53
54 static const char*
agp_sis_match(device_t dev)55 agp_sis_match(device_t dev)
56 {
57 if (pci_get_class(dev) != PCIC_BRIDGE
58 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
59 return NULL;
60
61 if (agp_find_caps(dev) == 0)
62 return NULL;
63
64 switch (pci_get_devid(dev)) {
65 case 0x00011039:
66 return ("SiS 5591 host to AGP bridge");
67 case 0x05301039:
68 return ("SiS 530 host to AGP bridge");
69 case 0x05401039:
70 return ("SiS 540 host to AGP bridge");
71 case 0x05501039:
72 return ("SiS 550 host to AGP bridge");
73 case 0x06201039:
74 return ("SiS 620 host to AGP bridge");
75 case 0x06301039:
76 return ("SiS 630 host to AGP bridge");
77 case 0x06451039:
78 return ("SiS 645 host to AGP bridge");
79 case 0x06461039:
80 return ("SiS 645DX host to AGP bridge");
81 case 0x06481039:
82 return ("SiS 648 host to AGP bridge");
83 case 0x06501039:
84 return ("SiS 650 host to AGP bridge");
85 case 0x06511039:
86 return ("SiS 651 host to AGP bridge");
87 case 0x06551039:
88 return ("SiS 655 host to AGP bridge");
89 case 0x06611039:
90 return ("SiS 661 host to AGP bridge");
91 case 0x07301039:
92 return ("SiS 730 host to AGP bridge");
93 case 0x07351039:
94 return ("SiS 735 host to AGP bridge");
95 case 0x07401039:
96 return ("SiS 740 host to AGP bridge");
97 case 0x07411039:
98 return ("SiS 741 host to AGP bridge");
99 case 0x07451039:
100 return ("SiS 745 host to AGP bridge");
101 case 0x07461039:
102 return ("SiS 746 host to AGP bridge");
103 }
104
105 return NULL;
106 }
107
108 static int
agp_sis_probe(device_t dev)109 agp_sis_probe(device_t dev)
110 {
111 const char *desc;
112
113 if (resource_disabled("agp", device_get_unit(dev)))
114 return (ENXIO);
115 desc = agp_sis_match(dev);
116 if (desc) {
117 device_set_desc(dev, desc);
118 return BUS_PROBE_DEFAULT;
119 }
120
121 return ENXIO;
122 }
123
124 static int
agp_sis_attach(device_t dev)125 agp_sis_attach(device_t dev)
126 {
127 struct agp_sis_softc *sc = device_get_softc(dev);
128 struct agp_gatt *gatt;
129 int error;
130
131 error = agp_generic_attach(dev);
132 if (error)
133 return error;
134
135 sc->initial_aperture = AGP_GET_APERTURE(dev);
136
137 for (;;) {
138 gatt = agp_alloc_gatt(dev);
139 if (gatt)
140 break;
141
142 /*
143 * Probably contigmalloc failure. Try reducing the
144 * aperture so that the gatt size reduces.
145 */
146 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
147 agp_generic_detach(dev);
148 return ENOMEM;
149 }
150 }
151 sc->gatt = gatt;
152
153 /* Install the gatt. */
154 pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4);
155
156 /* Enable the aperture. */
157 pci_write_config(dev, AGP_SIS_WINCTRL,
158 pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1);
159
160 /*
161 * Enable the TLB and make it automatically invalidate entries
162 * when the GATT is written.
163 */
164 pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1);
165
166 return 0;
167 }
168
169 static int
agp_sis_detach(device_t dev)170 agp_sis_detach(device_t dev)
171 {
172 struct agp_sis_softc *sc = device_get_softc(dev);
173
174 agp_free_cdev(dev);
175
176 /* Disable the aperture.. */
177 pci_write_config(dev, AGP_SIS_WINCTRL,
178 pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1);
179
180 /* and the TLB. */
181 pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1);
182
183 /* Put the aperture back the way it started. */
184 AGP_SET_APERTURE(dev, sc->initial_aperture);
185
186 agp_free_gatt(sc->gatt);
187 agp_free_res(dev);
188 return 0;
189 }
190
191 static u_int32_t
agp_sis_get_aperture(device_t dev)192 agp_sis_get_aperture(device_t dev)
193 {
194 int gws;
195
196 /*
197 * The aperture size is equal to 4M<<gws.
198 */
199 gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4;
200 return (4*1024*1024) << gws;
201 }
202
203 static int
agp_sis_set_aperture(device_t dev,u_int32_t aperture)204 agp_sis_set_aperture(device_t dev, u_int32_t aperture)
205 {
206 int gws;
207
208 /*
209 * Check for a power of two and make sure its within the
210 * programmable range.
211 */
212 if (aperture & (aperture - 1)
213 || aperture < 4*1024*1024
214 || aperture > 256*1024*1024)
215 return EINVAL;
216
217 gws = ffs(aperture / 4*1024*1024) - 1;
218
219 pci_write_config(dev, AGP_SIS_WINCTRL,
220 ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70)
221 | gws << 4), 1);
222
223 return 0;
224 }
225
226 static int
agp_sis_bind_page(device_t dev,vm_offset_t offset,vm_offset_t physical)227 agp_sis_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
228 {
229 struct agp_sis_softc *sc = device_get_softc(dev);
230
231 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
232 return EINVAL;
233
234 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
235 return 0;
236 }
237
238 static int
agp_sis_unbind_page(device_t dev,vm_offset_t offset)239 agp_sis_unbind_page(device_t dev, vm_offset_t offset)
240 {
241 struct agp_sis_softc *sc = device_get_softc(dev);
242
243 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
244 return EINVAL;
245
246 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
247 return 0;
248 }
249
250 static void
agp_sis_flush_tlb(device_t dev)251 agp_sis_flush_tlb(device_t dev)
252 {
253 pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1);
254 }
255
256 static device_method_t agp_sis_methods[] = {
257 /* Device interface */
258 DEVMETHOD(device_probe, agp_sis_probe),
259 DEVMETHOD(device_attach, agp_sis_attach),
260 DEVMETHOD(device_detach, agp_sis_detach),
261 DEVMETHOD(device_shutdown, bus_generic_shutdown),
262 DEVMETHOD(device_suspend, bus_generic_suspend),
263 DEVMETHOD(device_resume, bus_generic_resume),
264
265 /* AGP interface */
266 DEVMETHOD(agp_get_aperture, agp_sis_get_aperture),
267 DEVMETHOD(agp_set_aperture, agp_sis_set_aperture),
268 DEVMETHOD(agp_bind_page, agp_sis_bind_page),
269 DEVMETHOD(agp_unbind_page, agp_sis_unbind_page),
270 DEVMETHOD(agp_flush_tlb, agp_sis_flush_tlb),
271 DEVMETHOD(agp_enable, agp_generic_enable),
272 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
273 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
274 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
275 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
276 { 0, 0 }
277 };
278
279 static driver_t agp_sis_driver = {
280 "agp",
281 agp_sis_methods,
282 sizeof(struct agp_sis_softc),
283 };
284
285 DRIVER_MODULE(agp_sis, hostb, agp_sis_driver, 0, 0);
286 MODULE_DEPEND(agp_sis, agp, 1, 1, 1);
287 MODULE_DEPEND(agp_sis, pci, 1, 1, 1);
288