FreeBSD/Linux Kernel Cross Reference
sys/pci/agp_via.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/5.4/sys/pci/agp_via.c 142884 2005-03-01 08:11:52Z 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 #define REG_GARTCTRL 0
52 #define REG_APSIZE 1
53 #define REG_ATTBASE 2
54
55 struct agp_via_softc {
56 struct agp_softc agp;
57 u_int32_t initial_aperture; /* aperture size at startup */
58 struct agp_gatt *gatt;
59 int *regs;
60 };
61
62 static int via_v2_regs[] = { AGP_VIA_GARTCTRL, AGP_VIA_APSIZE,
63 AGP_VIA_ATTBASE };
64 static int via_v3_regs[] = { AGP3_VIA_GARTCTRL, AGP3_VIA_APSIZE,
65 AGP3_VIA_ATTBASE };
66
67 static const char*
68 agp_via_match(device_t dev)
69 {
70 if (pci_get_class(dev) != PCIC_BRIDGE
71 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
72 return NULL;
73
74 if (agp_find_caps(dev) == 0)
75 return NULL;
76
77 switch (pci_get_devid(dev)) {
78 case 0x01981106:
79 return ("VIA 8763 (P4X600) host to PCI bridge");
80 case 0x02591106:
81 return ("VIA PM800/PN800/PM880/PN880 host to PCI bridge");
82 case 0x02691106:
83 return ("VIA KT880 host to PCI bridge");
84 case 0x02961106:
85 return ("VIA 3296 (P4M800) host to PCI bridge");
86 case 0x03051106:
87 return ("VIA 82C8363 (Apollo KT133x/KM133) host to PCI bridge");
88 case 0x03911106:
89 return ("VIA 8371 (Apollo KX133) host to PCI bridge");
90 case 0x05011106:
91 return ("VIA 8501 (Apollo MVP4) host to PCI bridge");
92 case 0x05971106:
93 return ("VIA 82C597 (Apollo VP3) host to PCI bridge");
94 case 0x05981106:
95 return ("VIA 82C598 (Apollo MVP3) host to PCI bridge");
96 case 0x06011106:
97 return ("VIA 8601 (Apollo ProMedia/PLE133Ta) host to PCI bridge");
98 case 0x06051106:
99 return ("VIA 82C694X (Apollo Pro 133A) host to PCI bridge");
100 case 0x06911106:
101 return ("VIA 82C691 (Apollo Pro) host to PCI bridge");
102 case 0x30911106:
103 return ("VIA 8633 (Pro 266) host to PCI bridge");
104 case 0x30991106:
105 return ("VIA 8367 (KT266/KY266x/KT333) host to PCI bridge");
106 case 0x31011106:
107 return ("VIA 8653 (Pro266T) host to PCI bridge");
108 case 0x31121106:
109 return ("VIA 8361 (KLE133) host to PCI bridge");
110 case 0x31161106:
111 return ("VIA XM266 (PM266/KM266) host to PCI bridge");
112 case 0x31231106:
113 return ("VIA 862x (CLE266) host to PCI bridge");
114 case 0x31281106:
115 return ("VIA 8753 (P4X266) host to PCI bridge");
116 case 0x31481106:
117 return ("VIA 8703 (P4M266x/P4N266) host to PCI bridge");
118 case 0x31561106:
119 return ("VIA XN266 (Apollo Pro266) host to PCI bridge");
120 case 0x31681106:
121 return ("VIA 8754 (PT800) host to PCI bridge");
122 case 0x31891106:
123 return ("VIA 8377 (Apollo KT400/KT400A/KT600) host to PCI bridge");
124 case 0x32051106:
125 return ("VIA 8235/8237 (Apollo KM400/KM400A) host to PCI bridge");
126 case 0x32081106:
127 return ("VIA 8783 (PT890) host to PCI bridge");
128 case 0x32581106:
129 return ("VIA PT880 host to PCI bridge");
130 case 0xb1981106:
131 return ("VIA VT83xx/VT87xx/KTxxx/Px8xx host to PCI bridge");
132 };
133
134 return NULL;
135 }
136
137 static int
138 agp_via_probe(device_t dev)
139 {
140 const char *desc;
141
142 if (resource_disabled("agp", device_get_unit(dev)))
143 return (ENXIO);
144 desc = agp_via_match(dev);
145 if (desc) {
146 device_verbose(dev);
147 device_set_desc(dev, desc);
148 return BUS_PROBE_DEFAULT;
149 }
150
151 return ENXIO;
152 }
153
154 static int
155 agp_via_attach(device_t dev)
156 {
157 struct agp_via_softc *sc = device_get_softc(dev);
158 struct agp_gatt *gatt;
159 int error;
160 u_int32_t agpsel;
161
162 /* XXX: This should be keying off of whether the bridge is AGP3 capable,
163 * rather than a bunch of device ids for chipsets that happen to do 8x.
164 */
165 switch (pci_get_devid(dev)) {
166 case 0x01981106:
167 case 0x02591106:
168 case 0x02691106:
169 case 0x02961106:
170 case 0x31231106:
171 case 0x31681106:
172 case 0x31891106:
173 case 0x32051106:
174 case 0x32581106:
175 case 0xb1981106:
176 /* The newer VIA chipsets will select the AGP version based on
177 * what AGP versions the card supports. We still have to
178 * program it using the v2 registers if it has chosen to use
179 * compatibility mode.
180 */
181 agpsel = pci_read_config(dev, AGP_VIA_AGPSEL, 1);
182 if ((agpsel & (1 << 1)) == 0)
183 sc->regs = via_v3_regs;
184 else
185 sc->regs = via_v2_regs;
186 break;
187 default:
188 sc->regs = via_v2_regs;
189 break;
190 }
191
192 error = agp_generic_attach(dev);
193 if (error)
194 return error;
195
196 sc->initial_aperture = AGP_GET_APERTURE(dev);
197
198 for (;;) {
199 gatt = agp_alloc_gatt(dev);
200 if (gatt)
201 break;
202
203 /*
204 * Probably contigmalloc failure. Try reducing the
205 * aperture so that the gatt size reduces.
206 */
207 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
208 agp_generic_detach(dev);
209 return ENOMEM;
210 }
211 }
212 sc->gatt = gatt;
213
214 /* Install the gatt. */
215 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical | 3, 4);
216
217 /* Enable the aperture. */
218 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4);
219
220 return 0;
221 }
222
223 static int
224 agp_via_detach(device_t dev)
225 {
226 struct agp_via_softc *sc = device_get_softc(dev);
227 int error;
228
229 error = agp_generic_detach(dev);
230 if (error)
231 return error;
232
233 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0, 4);
234 pci_write_config(dev, sc->regs[REG_ATTBASE], 0, 4);
235 AGP_SET_APERTURE(dev, sc->initial_aperture);
236 agp_free_gatt(sc->gatt);
237
238 return 0;
239 }
240
241 static u_int32_t
242 agp_via_get_aperture(device_t dev)
243 {
244 struct agp_via_softc *sc = device_get_softc(dev);
245 u_int32_t apsize;
246
247 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 1) & 0x1f;
248
249 /*
250 * The size is determined by the number of low bits of
251 * register APBASE which are forced to zero. The low 20 bits
252 * are always forced to zero and each zero bit in the apsize
253 * field just read forces the corresponding bit in the 27:20
254 * to be zero. We calculate the aperture size accordingly.
255 */
256 return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1;
257 }
258
259 static int
260 agp_via_set_aperture(device_t dev, u_int32_t aperture)
261 {
262 struct agp_via_softc *sc = device_get_softc(dev);
263 u_int32_t apsize;
264
265 /*
266 * Reverse the magic from get_aperture.
267 */
268 apsize = ((aperture - 1) >> 20) ^ 0xff;
269
270 /*
271 * Double check for sanity.
272 */
273 if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture)
274 return EINVAL;
275
276 pci_write_config(dev, sc->regs[REG_APSIZE], apsize, 1);
277
278 return 0;
279 }
280
281 static int
282 agp_via_bind_page(device_t dev, int offset, vm_offset_t physical)
283 {
284 struct agp_via_softc *sc = device_get_softc(dev);
285
286 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
287 return EINVAL;
288
289 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
290 return 0;
291 }
292
293 static int
294 agp_via_unbind_page(device_t dev, int offset)
295 {
296 struct agp_via_softc *sc = device_get_softc(dev);
297
298 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
299 return EINVAL;
300
301 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
302 return 0;
303 }
304
305 static void
306 agp_via_flush_tlb(device_t dev)
307 {
308 struct agp_via_softc *sc = device_get_softc(dev);
309
310 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x8f, 4);
311 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4);
312 }
313
314 static device_method_t agp_via_methods[] = {
315 /* Device interface */
316 DEVMETHOD(device_probe, agp_via_probe),
317 DEVMETHOD(device_attach, agp_via_attach),
318 DEVMETHOD(device_detach, agp_via_detach),
319 DEVMETHOD(device_shutdown, bus_generic_shutdown),
320 DEVMETHOD(device_suspend, bus_generic_suspend),
321 DEVMETHOD(device_resume, bus_generic_resume),
322
323 /* AGP interface */
324 DEVMETHOD(agp_get_aperture, agp_via_get_aperture),
325 DEVMETHOD(agp_set_aperture, agp_via_set_aperture),
326 DEVMETHOD(agp_bind_page, agp_via_bind_page),
327 DEVMETHOD(agp_unbind_page, agp_via_unbind_page),
328 DEVMETHOD(agp_flush_tlb, agp_via_flush_tlb),
329 DEVMETHOD(agp_enable, agp_generic_enable),
330 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
331 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
332 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
333 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
334
335 { 0, 0 }
336 };
337
338 static driver_t agp_via_driver = {
339 "agp",
340 agp_via_methods,
341 sizeof(struct agp_via_softc),
342 };
343
344 static devclass_t agp_devclass;
345
346 DRIVER_MODULE(agp_via, pci, agp_via_driver, agp_devclass, 0, 0);
347 MODULE_DEPEND(agp_via, agp, 1, 1, 1);
348 MODULE_DEPEND(agp_via, pci, 1, 1, 1);
Cache object: 5719c826fb879ddef992392df2decf15
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