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agp_via.c (241856) agp_via.c (241885)
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>
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: head/sys/dev/agp/agp_via.c 241856 2012-10-22 03:41:14Z eadler $");
28__FBSDID("$FreeBSD: head/sys/dev/agp/agp_via.c 241885 2012-10-22 13:06:09Z eadler $");
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/agp/agppriv.h>
43#include <dev/agp/agpreg.h>
44#include <dev/pci/pcivar.h>
45#include <dev/pci/pcireg.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
55struct 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
62static int via_v2_regs[] = { AGP_VIA_GARTCTRL, AGP_VIA_APSIZE,
63 AGP_VIA_ATTBASE };
64static int via_v3_regs[] = { AGP3_VIA_GARTCTRL, AGP3_VIA_APSIZE,
65 AGP3_VIA_ATTBASE };
66
67static const char*
68agp_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 0x03141106:
89 return ("VIA 3314 (P4M800CE) host to PCI bridge");
90 case 0x03241106:
91 return ("VIA VT3324 (CX700) host to PCI bridge");
92 case 0x03271106:
93 return ("VIA 3327 (P4M890) host to PCI bridge");
94 case 0x03641106:
95 return ("VIA 3364 (P4M900) host to PCI bridge");
96 case 0x03911106:
97 return ("VIA 8371 (Apollo KX133) host to PCI bridge");
98 case 0x05011106:
99 return ("VIA 8501 (Apollo MVP4) host to PCI bridge");
100 case 0x05971106:
101 return ("VIA 82C597 (Apollo VP3) host to PCI bridge");
102 case 0x05981106:
103 return ("VIA 82C598 (Apollo MVP3) host to PCI bridge");
104 case 0x06011106:
105 return ("VIA 8601 (Apollo ProMedia/PLE133Ta) host to PCI bridge");
106 case 0x06051106:
107 return ("VIA 82C694X (Apollo Pro 133A) host to PCI bridge");
108 case 0x06911106:
109 return ("VIA 82C691 (Apollo Pro) host to PCI bridge");
110 case 0x30911106:
111 return ("VIA 8633 (Pro 266) host to PCI bridge");
112 case 0x30991106:
113 return ("VIA 8367 (KT266/KY266x/KT333) host to PCI bridge");
114 case 0x31011106:
115 return ("VIA 8653 (Pro266T) host to PCI bridge");
116 case 0x31121106:
117 return ("VIA 8361 (KLE133) host to PCI bridge");
118 case 0x31161106:
119 return ("VIA XM266 (PM266/KM266) host to PCI bridge");
120 case 0x31231106:
121 return ("VIA 862x (CLE266) host to PCI bridge");
122 case 0x31281106:
123 return ("VIA 8753 (P4X266) host to PCI bridge");
124 case 0x31481106:
125 return ("VIA 8703 (P4M266x/P4N266) host to PCI bridge");
126 case 0x31561106:
127 return ("VIA XN266 (Apollo Pro266) host to PCI bridge");
128 case 0x31681106:
129 return ("VIA 8754 (PT800) host to PCI bridge");
130 case 0x31891106:
131 return ("VIA 8377 (Apollo KT400/KT400A/KT600) host to PCI bridge");
132 case 0x32051106:
133 return ("VIA 8235/8237 (Apollo KM400/KM400A) host to PCI bridge");
134 case 0x32081106:
135 return ("VIA 8783 (PT890) host to PCI bridge");
136 case 0x32581106:
137 return ("VIA PT880 host to PCI bridge");
138 case 0xb1981106:
139 return ("VIA VT83xx/VT87xx/KTxxx/Px8xx host to PCI bridge");
140 };
141
142 return NULL;
143}
144
145static int
146agp_via_probe(device_t dev)
147{
148 const char *desc;
149
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/agp/agppriv.h>
43#include <dev/agp/agpreg.h>
44#include <dev/pci/pcivar.h>
45#include <dev/pci/pcireg.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
55struct 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
62static int via_v2_regs[] = { AGP_VIA_GARTCTRL, AGP_VIA_APSIZE,
63 AGP_VIA_ATTBASE };
64static int via_v3_regs[] = { AGP3_VIA_GARTCTRL, AGP3_VIA_APSIZE,
65 AGP3_VIA_ATTBASE };
66
67static const char*
68agp_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 0x03141106:
89 return ("VIA 3314 (P4M800CE) host to PCI bridge");
90 case 0x03241106:
91 return ("VIA VT3324 (CX700) host to PCI bridge");
92 case 0x03271106:
93 return ("VIA 3327 (P4M890) host to PCI bridge");
94 case 0x03641106:
95 return ("VIA 3364 (P4M900) host to PCI bridge");
96 case 0x03911106:
97 return ("VIA 8371 (Apollo KX133) host to PCI bridge");
98 case 0x05011106:
99 return ("VIA 8501 (Apollo MVP4) host to PCI bridge");
100 case 0x05971106:
101 return ("VIA 82C597 (Apollo VP3) host to PCI bridge");
102 case 0x05981106:
103 return ("VIA 82C598 (Apollo MVP3) host to PCI bridge");
104 case 0x06011106:
105 return ("VIA 8601 (Apollo ProMedia/PLE133Ta) host to PCI bridge");
106 case 0x06051106:
107 return ("VIA 82C694X (Apollo Pro 133A) host to PCI bridge");
108 case 0x06911106:
109 return ("VIA 82C691 (Apollo Pro) host to PCI bridge");
110 case 0x30911106:
111 return ("VIA 8633 (Pro 266) host to PCI bridge");
112 case 0x30991106:
113 return ("VIA 8367 (KT266/KY266x/KT333) host to PCI bridge");
114 case 0x31011106:
115 return ("VIA 8653 (Pro266T) host to PCI bridge");
116 case 0x31121106:
117 return ("VIA 8361 (KLE133) host to PCI bridge");
118 case 0x31161106:
119 return ("VIA XM266 (PM266/KM266) host to PCI bridge");
120 case 0x31231106:
121 return ("VIA 862x (CLE266) host to PCI bridge");
122 case 0x31281106:
123 return ("VIA 8753 (P4X266) host to PCI bridge");
124 case 0x31481106:
125 return ("VIA 8703 (P4M266x/P4N266) host to PCI bridge");
126 case 0x31561106:
127 return ("VIA XN266 (Apollo Pro266) host to PCI bridge");
128 case 0x31681106:
129 return ("VIA 8754 (PT800) host to PCI bridge");
130 case 0x31891106:
131 return ("VIA 8377 (Apollo KT400/KT400A/KT600) host to PCI bridge");
132 case 0x32051106:
133 return ("VIA 8235/8237 (Apollo KM400/KM400A) host to PCI bridge");
134 case 0x32081106:
135 return ("VIA 8783 (PT890) host to PCI bridge");
136 case 0x32581106:
137 return ("VIA PT880 host to PCI bridge");
138 case 0xb1981106:
139 return ("VIA VT83xx/VT87xx/KTxxx/Px8xx host to PCI bridge");
140 };
141
142 return NULL;
143}
144
145static int
146agp_via_probe(device_t dev)
147{
148 const char *desc;
149
150 if (resource_disabled("agp", device_get_unit(dev)))
151 return (ENXIO);
150 desc = agp_via_match(dev);
151 if (desc) {
152 device_set_desc(dev, desc);
153 return BUS_PROBE_DEFAULT;
154 }
155
156 return ENXIO;
157}
158
159static int
160agp_via_attach(device_t dev)
161{
162 struct agp_via_softc *sc = device_get_softc(dev);
163 struct agp_gatt *gatt;
164 int error;
165 u_int32_t agpsel;
166 u_int32_t capid;
167
168 sc->regs = via_v2_regs;
169
170 /* Look at the capability register to see if we handle AGP3 */
171 capid = pci_read_config(dev, agp_find_caps(dev) + AGP_CAPID, 4);
172 if (((capid >> 20) & 0x0f) >= 3) {
173 agpsel = pci_read_config(dev, AGP_VIA_AGPSEL, 1);
174 if ((agpsel & (1 << 1)) == 0)
175 sc->regs = via_v3_regs;
176 }
177
178 error = agp_generic_attach(dev);
179 if (error)
180 return error;
181
182 sc->initial_aperture = AGP_GET_APERTURE(dev);
183
184 for (;;) {
185 gatt = agp_alloc_gatt(dev);
186 if (gatt)
187 break;
188
189 /*
190 * Probably contigmalloc failure. Try reducing the
191 * aperture so that the gatt size reduces.
192 */
193 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
194 agp_generic_detach(dev);
195 return ENOMEM;
196 }
197 }
198 sc->gatt = gatt;
199
200 if (sc->regs == via_v2_regs) {
201 /* Install the gatt. */
202 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical | 3, 4);
203
204 /* Enable the aperture. */
205 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4);
206 } else {
207 u_int32_t gartctrl;
208
209 /* Install the gatt. */
210 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical, 4);
211
212 /* Enable the aperture. */
213 gartctrl = pci_read_config(dev, sc->regs[REG_GARTCTRL], 4);
214 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl | (3 << 7), 4);
215 }
216
217 device_printf(dev, "aperture size is %dM\n",
218 sc->initial_aperture / 1024 / 1024);
219
220 return 0;
221}
222
223static int
224agp_via_detach(device_t dev)
225{
226 struct agp_via_softc *sc = device_get_softc(dev);
227
228 agp_free_cdev(dev);
229
230 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0, 4);
231 pci_write_config(dev, sc->regs[REG_ATTBASE], 0, 4);
232 AGP_SET_APERTURE(dev, sc->initial_aperture);
233 agp_free_gatt(sc->gatt);
234 agp_free_res(dev);
235
236 return 0;
237}
238
239static u_int32_t
240agp_via_get_aperture(device_t dev)
241{
242 struct agp_via_softc *sc = device_get_softc(dev);
243 u_int32_t apsize;
244
245 if (sc->regs == via_v2_regs) {
246 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 1);
247
248 /*
249 * The size is determined by the number of low bits of
250 * register APBASE which are forced to zero. The low 20 bits
251 * are always forced to zero and each zero bit in the apsize
252 * field just read forces the corresponding bit in the 27:20
253 * to be zero. We calculate the aperture size accordingly.
254 */
255 return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1;
256 } else {
257 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 2) & 0xfff;
258 switch (apsize) {
259 case 0x800:
260 return 0x80000000;
261 case 0xc00:
262 return 0x40000000;
263 case 0xe00:
264 return 0x20000000;
265 case 0xf00:
266 return 0x10000000;
267 case 0xf20:
268 return 0x08000000;
269 case 0xf30:
270 return 0x04000000;
271 case 0xf38:
272 return 0x02000000;
273 case 0xf3c:
274 return 0x01000000;
275 case 0xf3e:
276 return 0x00800000;
277 case 0xf3f:
278 return 0x00400000;
279 default:
280 device_printf(dev, "Invalid aperture setting 0x%x\n",
281 pci_read_config(dev, sc->regs[REG_APSIZE], 2));
282 return 0;
283 }
284 }
285}
286
287static int
288agp_via_set_aperture(device_t dev, u_int32_t aperture)
289{
290 struct agp_via_softc *sc = device_get_softc(dev);
291 u_int32_t apsize, key, val;
292
293 if (sc->regs == via_v2_regs) {
294 /*
295 * Reverse the magic from get_aperture.
296 */
297 apsize = ((aperture - 1) >> 20) ^ 0xff;
298
299 /*
300 * Double check for sanity.
301 */
302 if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture)
303 return EINVAL;
304
305 pci_write_config(dev, sc->regs[REG_APSIZE], apsize, 1);
306 } else {
307 switch (aperture) {
308 case 0x80000000:
309 key = 0x800;
310 break;
311 case 0x40000000:
312 key = 0xc00;
313 break;
314 case 0x20000000:
315 key = 0xe00;
316 break;
317 case 0x10000000:
318 key = 0xf00;
319 break;
320 case 0x08000000:
321 key = 0xf20;
322 break;
323 case 0x04000000:
324 key = 0xf30;
325 break;
326 case 0x02000000:
327 key = 0xf38;
328 break;
329 case 0x01000000:
330 key = 0xf3c;
331 break;
332 case 0x00800000:
333 key = 0xf3e;
334 break;
335 case 0x00400000:
336 key = 0xf3f;
337 break;
338 default:
339 device_printf(dev, "Invalid aperture size (%dMb)\n",
340 aperture / 1024 / 1024);
341 return EINVAL;
342 }
343 val = pci_read_config(dev, sc->regs[REG_APSIZE], 2);
344 pci_write_config(dev, sc->regs[REG_APSIZE],
345 ((val & ~0xfff) | key), 2);
346 }
347 return 0;
348}
349
350static int
351agp_via_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
352{
353 struct agp_via_softc *sc = device_get_softc(dev);
354
355 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
356 return EINVAL;
357
358 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
359 return 0;
360}
361
362static int
363agp_via_unbind_page(device_t dev, vm_offset_t offset)
364{
365 struct agp_via_softc *sc = device_get_softc(dev);
366
367 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
368 return EINVAL;
369
370 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
371 return 0;
372}
373
374static void
375agp_via_flush_tlb(device_t dev)
376{
377 struct agp_via_softc *sc = device_get_softc(dev);
378 u_int32_t gartctrl;
379
380 if (sc->regs == via_v2_regs) {
381 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x8f, 4);
382 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4);
383 } else {
384 gartctrl = pci_read_config(dev, sc->regs[REG_GARTCTRL], 4);
385 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl &
386 ~(1 << 7), 4);
387 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl, 4);
388 }
389
390}
391
392static device_method_t agp_via_methods[] = {
393 /* Device interface */
394 DEVMETHOD(device_probe, agp_via_probe),
395 DEVMETHOD(device_attach, agp_via_attach),
396 DEVMETHOD(device_detach, agp_via_detach),
397 DEVMETHOD(device_shutdown, bus_generic_shutdown),
398 DEVMETHOD(device_suspend, bus_generic_suspend),
399 DEVMETHOD(device_resume, bus_generic_resume),
400
401 /* AGP interface */
402 DEVMETHOD(agp_get_aperture, agp_via_get_aperture),
403 DEVMETHOD(agp_set_aperture, agp_via_set_aperture),
404 DEVMETHOD(agp_bind_page, agp_via_bind_page),
405 DEVMETHOD(agp_unbind_page, agp_via_unbind_page),
406 DEVMETHOD(agp_flush_tlb, agp_via_flush_tlb),
407 DEVMETHOD(agp_enable, agp_generic_enable),
408 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
409 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
410 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
411 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
412
413 { 0, 0 }
414};
415
416static driver_t agp_via_driver = {
417 "agp",
418 agp_via_methods,
419 sizeof(struct agp_via_softc),
420};
421
422static devclass_t agp_devclass;
423
424DRIVER_MODULE(agp_via, hostb, agp_via_driver, agp_devclass, 0, 0);
425MODULE_DEPEND(agp_via, agp, 1, 1, 1);
426MODULE_DEPEND(agp_via, pci, 1, 1, 1);
152 desc = agp_via_match(dev);
153 if (desc) {
154 device_set_desc(dev, desc);
155 return BUS_PROBE_DEFAULT;
156 }
157
158 return ENXIO;
159}
160
161static int
162agp_via_attach(device_t dev)
163{
164 struct agp_via_softc *sc = device_get_softc(dev);
165 struct agp_gatt *gatt;
166 int error;
167 u_int32_t agpsel;
168 u_int32_t capid;
169
170 sc->regs = via_v2_regs;
171
172 /* Look at the capability register to see if we handle AGP3 */
173 capid = pci_read_config(dev, agp_find_caps(dev) + AGP_CAPID, 4);
174 if (((capid >> 20) & 0x0f) >= 3) {
175 agpsel = pci_read_config(dev, AGP_VIA_AGPSEL, 1);
176 if ((agpsel & (1 << 1)) == 0)
177 sc->regs = via_v3_regs;
178 }
179
180 error = agp_generic_attach(dev);
181 if (error)
182 return error;
183
184 sc->initial_aperture = AGP_GET_APERTURE(dev);
185
186 for (;;) {
187 gatt = agp_alloc_gatt(dev);
188 if (gatt)
189 break;
190
191 /*
192 * Probably contigmalloc failure. Try reducing the
193 * aperture so that the gatt size reduces.
194 */
195 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
196 agp_generic_detach(dev);
197 return ENOMEM;
198 }
199 }
200 sc->gatt = gatt;
201
202 if (sc->regs == via_v2_regs) {
203 /* Install the gatt. */
204 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical | 3, 4);
205
206 /* Enable the aperture. */
207 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4);
208 } else {
209 u_int32_t gartctrl;
210
211 /* Install the gatt. */
212 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical, 4);
213
214 /* Enable the aperture. */
215 gartctrl = pci_read_config(dev, sc->regs[REG_GARTCTRL], 4);
216 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl | (3 << 7), 4);
217 }
218
219 device_printf(dev, "aperture size is %dM\n",
220 sc->initial_aperture / 1024 / 1024);
221
222 return 0;
223}
224
225static int
226agp_via_detach(device_t dev)
227{
228 struct agp_via_softc *sc = device_get_softc(dev);
229
230 agp_free_cdev(dev);
231
232 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0, 4);
233 pci_write_config(dev, sc->regs[REG_ATTBASE], 0, 4);
234 AGP_SET_APERTURE(dev, sc->initial_aperture);
235 agp_free_gatt(sc->gatt);
236 agp_free_res(dev);
237
238 return 0;
239}
240
241static u_int32_t
242agp_via_get_aperture(device_t dev)
243{
244 struct agp_via_softc *sc = device_get_softc(dev);
245 u_int32_t apsize;
246
247 if (sc->regs == via_v2_regs) {
248 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 1);
249
250 /*
251 * The size is determined by the number of low bits of
252 * register APBASE which are forced to zero. The low 20 bits
253 * are always forced to zero and each zero bit in the apsize
254 * field just read forces the corresponding bit in the 27:20
255 * to be zero. We calculate the aperture size accordingly.
256 */
257 return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1;
258 } else {
259 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 2) & 0xfff;
260 switch (apsize) {
261 case 0x800:
262 return 0x80000000;
263 case 0xc00:
264 return 0x40000000;
265 case 0xe00:
266 return 0x20000000;
267 case 0xf00:
268 return 0x10000000;
269 case 0xf20:
270 return 0x08000000;
271 case 0xf30:
272 return 0x04000000;
273 case 0xf38:
274 return 0x02000000;
275 case 0xf3c:
276 return 0x01000000;
277 case 0xf3e:
278 return 0x00800000;
279 case 0xf3f:
280 return 0x00400000;
281 default:
282 device_printf(dev, "Invalid aperture setting 0x%x\n",
283 pci_read_config(dev, sc->regs[REG_APSIZE], 2));
284 return 0;
285 }
286 }
287}
288
289static int
290agp_via_set_aperture(device_t dev, u_int32_t aperture)
291{
292 struct agp_via_softc *sc = device_get_softc(dev);
293 u_int32_t apsize, key, val;
294
295 if (sc->regs == via_v2_regs) {
296 /*
297 * Reverse the magic from get_aperture.
298 */
299 apsize = ((aperture - 1) >> 20) ^ 0xff;
300
301 /*
302 * Double check for sanity.
303 */
304 if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture)
305 return EINVAL;
306
307 pci_write_config(dev, sc->regs[REG_APSIZE], apsize, 1);
308 } else {
309 switch (aperture) {
310 case 0x80000000:
311 key = 0x800;
312 break;
313 case 0x40000000:
314 key = 0xc00;
315 break;
316 case 0x20000000:
317 key = 0xe00;
318 break;
319 case 0x10000000:
320 key = 0xf00;
321 break;
322 case 0x08000000:
323 key = 0xf20;
324 break;
325 case 0x04000000:
326 key = 0xf30;
327 break;
328 case 0x02000000:
329 key = 0xf38;
330 break;
331 case 0x01000000:
332 key = 0xf3c;
333 break;
334 case 0x00800000:
335 key = 0xf3e;
336 break;
337 case 0x00400000:
338 key = 0xf3f;
339 break;
340 default:
341 device_printf(dev, "Invalid aperture size (%dMb)\n",
342 aperture / 1024 / 1024);
343 return EINVAL;
344 }
345 val = pci_read_config(dev, sc->regs[REG_APSIZE], 2);
346 pci_write_config(dev, sc->regs[REG_APSIZE],
347 ((val & ~0xfff) | key), 2);
348 }
349 return 0;
350}
351
352static int
353agp_via_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
354{
355 struct agp_via_softc *sc = device_get_softc(dev);
356
357 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
358 return EINVAL;
359
360 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
361 return 0;
362}
363
364static int
365agp_via_unbind_page(device_t dev, vm_offset_t offset)
366{
367 struct agp_via_softc *sc = device_get_softc(dev);
368
369 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
370 return EINVAL;
371
372 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
373 return 0;
374}
375
376static void
377agp_via_flush_tlb(device_t dev)
378{
379 struct agp_via_softc *sc = device_get_softc(dev);
380 u_int32_t gartctrl;
381
382 if (sc->regs == via_v2_regs) {
383 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x8f, 4);
384 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4);
385 } else {
386 gartctrl = pci_read_config(dev, sc->regs[REG_GARTCTRL], 4);
387 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl &
388 ~(1 << 7), 4);
389 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl, 4);
390 }
391
392}
393
394static device_method_t agp_via_methods[] = {
395 /* Device interface */
396 DEVMETHOD(device_probe, agp_via_probe),
397 DEVMETHOD(device_attach, agp_via_attach),
398 DEVMETHOD(device_detach, agp_via_detach),
399 DEVMETHOD(device_shutdown, bus_generic_shutdown),
400 DEVMETHOD(device_suspend, bus_generic_suspend),
401 DEVMETHOD(device_resume, bus_generic_resume),
402
403 /* AGP interface */
404 DEVMETHOD(agp_get_aperture, agp_via_get_aperture),
405 DEVMETHOD(agp_set_aperture, agp_via_set_aperture),
406 DEVMETHOD(agp_bind_page, agp_via_bind_page),
407 DEVMETHOD(agp_unbind_page, agp_via_unbind_page),
408 DEVMETHOD(agp_flush_tlb, agp_via_flush_tlb),
409 DEVMETHOD(agp_enable, agp_generic_enable),
410 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
411 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
412 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
413 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
414
415 { 0, 0 }
416};
417
418static driver_t agp_via_driver = {
419 "agp",
420 agp_via_methods,
421 sizeof(struct agp_via_softc),
422};
423
424static devclass_t agp_devclass;
425
426DRIVER_MODULE(agp_via, hostb, agp_via_driver, agp_devclass, 0, 0);
427MODULE_DEPEND(agp_via, agp, 1, 1, 1);
428MODULE_DEPEND(agp_via, pci, 1, 1, 1);