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/6.0/sys/pci/agp_via.c 147606 2005-06-26 04:01:11Z anholt $");
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 if (sc->regs == via_v2_regs) {
215 /* Install the gatt. */
216 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical | 3, 4);
217
218 /* Enable the aperture. */
219 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4);
220 } else {
221 u_int32_t gartctrl;
222
223 /* Install the gatt. */
224 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical, 4);
225
226 /* Enable the aperture. */
227 gartctrl = pci_read_config(dev, sc->regs[REG_ATTBASE], 4);
228 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl | (3 << 7), 4);
229 }
230
231 return 0;
232 }
233
234 static int
235 agp_via_detach(device_t dev)
236 {
237 struct agp_via_softc *sc = device_get_softc(dev);
238 int error;
239
240 error = agp_generic_detach(dev);
241 if (error)
242 return error;
243
244 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0, 4);
245 pci_write_config(dev, sc->regs[REG_ATTBASE], 0, 4);
246 AGP_SET_APERTURE(dev, sc->initial_aperture);
247 agp_free_gatt(sc->gatt);
248
249 return 0;
250 }
251
252 static u_int32_t
253 agp_via_get_aperture(device_t dev)
254 {
255 struct agp_via_softc *sc = device_get_softc(dev);
256 u_int32_t apsize;
257
258 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 1) & 0x1f;
259
260 /*
261 * The size is determined by the number of low bits of
262 * register APBASE which are forced to zero. The low 20 bits
263 * are always forced to zero and each zero bit in the apsize
264 * field just read forces the corresponding bit in the 27:20
265 * to be zero. We calculate the aperture size accordingly.
266 */
267 return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1;
268 }
269
270 static int
271 agp_via_set_aperture(device_t dev, u_int32_t aperture)
272 {
273 struct agp_via_softc *sc = device_get_softc(dev);
274 u_int32_t apsize;
275
276 /*
277 * Reverse the magic from get_aperture.
278 */
279 apsize = ((aperture - 1) >> 20) ^ 0xff;
280
281 /*
282 * Double check for sanity.
283 */
284 if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture)
285 return EINVAL;
286
287 pci_write_config(dev, sc->regs[REG_APSIZE], apsize, 1);
288
289 return 0;
290 }
291
292 static int
293 agp_via_bind_page(device_t dev, int offset, vm_offset_t physical)
294 {
295 struct agp_via_softc *sc = device_get_softc(dev);
296
297 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
298 return EINVAL;
299
300 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
301 return 0;
302 }
303
304 static int
305 agp_via_unbind_page(device_t dev, int offset)
306 {
307 struct agp_via_softc *sc = device_get_softc(dev);
308
309 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
310 return EINVAL;
311
312 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
313 return 0;
314 }
315
316 static void
317 agp_via_flush_tlb(device_t dev)
318 {
319 struct agp_via_softc *sc = device_get_softc(dev);
320 u_int32_t gartctrl;
321
322 if (sc->regs == via_v2_regs) {
323 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x8f, 4);
324 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4);
325 } else {
326 gartctrl = pci_read_config(dev, sc->regs[REG_GARTCTRL], 4);
327 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl &
328 ~(1 << 7), 4);
329 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl, 4);
330 }
331
332 }
333
334 static device_method_t agp_via_methods[] = {
335 /* Device interface */
336 DEVMETHOD(device_probe, agp_via_probe),
337 DEVMETHOD(device_attach, agp_via_attach),
338 DEVMETHOD(device_detach, agp_via_detach),
339 DEVMETHOD(device_shutdown, bus_generic_shutdown),
340 DEVMETHOD(device_suspend, bus_generic_suspend),
341 DEVMETHOD(device_resume, bus_generic_resume),
342
343 /* AGP interface */
344 DEVMETHOD(agp_get_aperture, agp_via_get_aperture),
345 DEVMETHOD(agp_set_aperture, agp_via_set_aperture),
346 DEVMETHOD(agp_bind_page, agp_via_bind_page),
347 DEVMETHOD(agp_unbind_page, agp_via_unbind_page),
348 DEVMETHOD(agp_flush_tlb, agp_via_flush_tlb),
349 DEVMETHOD(agp_enable, agp_generic_enable),
350 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
351 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
352 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
353 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
354
355 { 0, 0 }
356 };
357
358 static driver_t agp_via_driver = {
359 "agp",
360 agp_via_methods,
361 sizeof(struct agp_via_softc),
362 };
363
364 static devclass_t agp_devclass;
365
366 DRIVER_MODULE(agp_via, pci, agp_via_driver, agp_devclass, 0, 0);
367 MODULE_DEPEND(agp_via, agp, 1, 1, 1);
368 MODULE_DEPEND(agp_via, pci, 1, 1, 1);
Cache object: 069164e9349828af1a393642914971da
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