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 #define REG_GARTCTRL 0
49 #define REG_APSIZE 1
50 #define REG_ATTBASE 2
51
52 struct agp_via_softc {
53 struct agp_softc agp;
54 u_int32_t initial_aperture; /* aperture size at startup */
55 struct agp_gatt *gatt;
56 int *regs;
57 };
58
59 static int via_v2_regs[] = { AGP_VIA_GARTCTRL, AGP_VIA_APSIZE,
60 AGP_VIA_ATTBASE };
61 static int via_v3_regs[] = { AGP3_VIA_GARTCTRL, AGP3_VIA_APSIZE,
62 AGP3_VIA_ATTBASE };
63
64 static const char*
agp_via_match(device_t dev)65 agp_via_match(device_t dev)
66 {
67 if (pci_get_class(dev) != PCIC_BRIDGE
68 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
69 return NULL;
70
71 if (agp_find_caps(dev) == 0)
72 return NULL;
73
74 switch (pci_get_devid(dev)) {
75 case 0x01981106:
76 return ("VIA 8763 (P4X600) host to PCI bridge");
77 case 0x02591106:
78 return ("VIA PM800/PN800/PM880/PN880 host to PCI bridge");
79 case 0x02691106:
80 return ("VIA KT880 host to PCI bridge");
81 case 0x02961106:
82 return ("VIA 3296 (P4M800) host to PCI bridge");
83 case 0x03051106:
84 return ("VIA 82C8363 (Apollo KT133x/KM133) host to PCI bridge");
85 case 0x03141106:
86 return ("VIA 3314 (P4M800CE) host to PCI bridge");
87 case 0x03241106:
88 return ("VIA VT3324 (CX700) host to PCI bridge");
89 case 0x03271106:
90 return ("VIA 3327 (P4M890) host to PCI bridge");
91 case 0x03641106:
92 return ("VIA 3364 (P4M900) host to PCI bridge");
93 case 0x03911106:
94 return ("VIA 8371 (Apollo KX133) host to PCI bridge");
95 case 0x05011106:
96 return ("VIA 8501 (Apollo MVP4) host to PCI bridge");
97 case 0x05971106:
98 return ("VIA 82C597 (Apollo VP3) host to PCI bridge");
99 case 0x05981106:
100 return ("VIA 82C598 (Apollo MVP3) host to PCI bridge");
101 case 0x06011106:
102 return ("VIA 8601 (Apollo ProMedia/PLE133Ta) host to PCI bridge");
103 case 0x06051106:
104 return ("VIA 82C694X (Apollo Pro 133A) host to PCI bridge");
105 case 0x06911106:
106 return ("VIA 82C691 (Apollo Pro) host to PCI bridge");
107 case 0x30911106:
108 return ("VIA 8633 (Pro 266) host to PCI bridge");
109 case 0x30991106:
110 return ("VIA 8367 (KT266/KY266x/KT333) host to PCI bridge");
111 case 0x31011106:
112 return ("VIA 8653 (Pro266T) host to PCI bridge");
113 case 0x31121106:
114 return ("VIA 8361 (KLE133) host to PCI bridge");
115 case 0x31161106:
116 return ("VIA XM266 (PM266/KM266) host to PCI bridge");
117 case 0x31231106:
118 return ("VIA 862x (CLE266) host to PCI bridge");
119 case 0x31281106:
120 return ("VIA 8753 (P4X266) host to PCI bridge");
121 case 0x31481106:
122 return ("VIA 8703 (P4M266x/P4N266) host to PCI bridge");
123 case 0x31561106:
124 return ("VIA XN266 (Apollo Pro266) host to PCI bridge");
125 case 0x31681106:
126 return ("VIA 8754 (PT800) host to PCI bridge");
127 case 0x31891106:
128 return ("VIA 8377 (Apollo KT400/KT400A/KT600) host to PCI bridge");
129 case 0x32051106:
130 return ("VIA 8235/8237 (Apollo KM400/KM400A) host to PCI bridge");
131 case 0x32081106:
132 return ("VIA 8783 (PT890) host to PCI bridge");
133 case 0x32581106:
134 return ("VIA PT880 host to PCI bridge");
135 case 0xb1981106:
136 return ("VIA VT83xx/VT87xx/KTxxx/Px8xx host to PCI bridge");
137 }
138
139 return NULL;
140 }
141
142 static int
agp_via_probe(device_t dev)143 agp_via_probe(device_t dev)
144 {
145 const char *desc;
146
147 if (resource_disabled("agp", device_get_unit(dev)))
148 return (ENXIO);
149 desc = agp_via_match(dev);
150 if (desc) {
151 device_set_desc(dev, desc);
152 return BUS_PROBE_DEFAULT;
153 }
154
155 return ENXIO;
156 }
157
158 static int
agp_via_attach(device_t dev)159 agp_via_attach(device_t dev)
160 {
161 struct agp_via_softc *sc = device_get_softc(dev);
162 struct agp_gatt *gatt;
163 int error;
164 u_int32_t agpsel;
165 u_int32_t capid;
166
167 sc->regs = via_v2_regs;
168
169 /* Look at the capability register to see if we handle AGP3 */
170 capid = pci_read_config(dev, agp_find_caps(dev) + AGP_CAPID, 4);
171 if (((capid >> 20) & 0x0f) >= 3) {
172 agpsel = pci_read_config(dev, AGP_VIA_AGPSEL, 1);
173 if ((agpsel & (1 << 1)) == 0)
174 sc->regs = via_v3_regs;
175 }
176
177 error = agp_generic_attach(dev);
178 if (error)
179 return error;
180
181 sc->initial_aperture = AGP_GET_APERTURE(dev);
182
183 for (;;) {
184 gatt = agp_alloc_gatt(dev);
185 if (gatt)
186 break;
187
188 /*
189 * Probably contigmalloc failure. Try reducing the
190 * aperture so that the gatt size reduces.
191 */
192 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
193 agp_generic_detach(dev);
194 return ENOMEM;
195 }
196 }
197 sc->gatt = gatt;
198
199 if (sc->regs == via_v2_regs) {
200 /* Install the gatt. */
201 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical | 3, 4);
202
203 /* Enable the aperture. */
204 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4);
205 } else {
206 u_int32_t gartctrl;
207
208 /* Install the gatt. */
209 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical, 4);
210
211 /* Enable the aperture. */
212 gartctrl = pci_read_config(dev, sc->regs[REG_GARTCTRL], 4);
213 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl | (3 << 7), 4);
214 }
215
216 device_printf(dev, "aperture size is %dM\n",
217 sc->initial_aperture / 1024 / 1024);
218
219 return 0;
220 }
221
222 static int
agp_via_detach(device_t dev)223 agp_via_detach(device_t dev)
224 {
225 struct agp_via_softc *sc = device_get_softc(dev);
226
227 agp_free_cdev(dev);
228
229 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0, 4);
230 pci_write_config(dev, sc->regs[REG_ATTBASE], 0, 4);
231 AGP_SET_APERTURE(dev, sc->initial_aperture);
232 agp_free_gatt(sc->gatt);
233 agp_free_res(dev);
234
235 return 0;
236 }
237
238 static u_int32_t
agp_via_get_aperture(device_t dev)239 agp_via_get_aperture(device_t dev)
240 {
241 struct agp_via_softc *sc = device_get_softc(dev);
242 u_int32_t apsize;
243
244 if (sc->regs == via_v2_regs) {
245 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 1);
246
247 /*
248 * The size is determined by the number of low bits of
249 * register APBASE which are forced to zero. The low 20 bits
250 * are always forced to zero and each zero bit in the apsize
251 * field just read forces the corresponding bit in the 27:20
252 * to be zero. We calculate the aperture size accordingly.
253 */
254 return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1;
255 } else {
256 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 2) & 0xfff;
257 switch (apsize) {
258 case 0x800:
259 return 0x80000000;
260 case 0xc00:
261 return 0x40000000;
262 case 0xe00:
263 return 0x20000000;
264 case 0xf00:
265 return 0x10000000;
266 case 0xf20:
267 return 0x08000000;
268 case 0xf30:
269 return 0x04000000;
270 case 0xf38:
271 return 0x02000000;
272 case 0xf3c:
273 return 0x01000000;
274 case 0xf3e:
275 return 0x00800000;
276 case 0xf3f:
277 return 0x00400000;
278 default:
279 device_printf(dev, "Invalid aperture setting 0x%x\n",
280 pci_read_config(dev, sc->regs[REG_APSIZE], 2));
281 return 0;
282 }
283 }
284 }
285
286 static int
agp_via_set_aperture(device_t dev,u_int32_t aperture)287 agp_via_set_aperture(device_t dev, u_int32_t aperture)
288 {
289 struct agp_via_softc *sc = device_get_softc(dev);
290 u_int32_t apsize, key, val;
291
292 if (sc->regs == via_v2_regs) {
293 /*
294 * Reverse the magic from get_aperture.
295 */
296 apsize = ((aperture - 1) >> 20) ^ 0xff;
297
298 /*
299 * Double check for sanity.
300 */
301 if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture)
302 return EINVAL;
303
304 pci_write_config(dev, sc->regs[REG_APSIZE], apsize, 1);
305 } else {
306 switch (aperture) {
307 case 0x80000000:
308 key = 0x800;
309 break;
310 case 0x40000000:
311 key = 0xc00;
312 break;
313 case 0x20000000:
314 key = 0xe00;
315 break;
316 case 0x10000000:
317 key = 0xf00;
318 break;
319 case 0x08000000:
320 key = 0xf20;
321 break;
322 case 0x04000000:
323 key = 0xf30;
324 break;
325 case 0x02000000:
326 key = 0xf38;
327 break;
328 case 0x01000000:
329 key = 0xf3c;
330 break;
331 case 0x00800000:
332 key = 0xf3e;
333 break;
334 case 0x00400000:
335 key = 0xf3f;
336 break;
337 default:
338 device_printf(dev, "Invalid aperture size (%dMb)\n",
339 aperture / 1024 / 1024);
340 return EINVAL;
341 }
342 val = pci_read_config(dev, sc->regs[REG_APSIZE], 2);
343 pci_write_config(dev, sc->regs[REG_APSIZE],
344 ((val & ~0xfff) | key), 2);
345 }
346 return 0;
347 }
348
349 static int
agp_via_bind_page(device_t dev,vm_offset_t offset,vm_offset_t physical)350 agp_via_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
351 {
352 struct agp_via_softc *sc = device_get_softc(dev);
353
354 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
355 return EINVAL;
356
357 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
358 return 0;
359 }
360
361 static int
agp_via_unbind_page(device_t dev,vm_offset_t offset)362 agp_via_unbind_page(device_t dev, vm_offset_t offset)
363 {
364 struct agp_via_softc *sc = device_get_softc(dev);
365
366 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
367 return EINVAL;
368
369 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
370 return 0;
371 }
372
373 static void
agp_via_flush_tlb(device_t dev)374 agp_via_flush_tlb(device_t dev)
375 {
376 struct agp_via_softc *sc = device_get_softc(dev);
377 u_int32_t gartctrl;
378
379 if (sc->regs == via_v2_regs) {
380 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x8f, 4);
381 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4);
382 } else {
383 gartctrl = pci_read_config(dev, sc->regs[REG_GARTCTRL], 4);
384 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl &
385 ~(1 << 7), 4);
386 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl, 4);
387 }
388
389 }
390
391 static device_method_t agp_via_methods[] = {
392 /* Device interface */
393 DEVMETHOD(device_probe, agp_via_probe),
394 DEVMETHOD(device_attach, agp_via_attach),
395 DEVMETHOD(device_detach, agp_via_detach),
396 DEVMETHOD(device_shutdown, bus_generic_shutdown),
397 DEVMETHOD(device_suspend, bus_generic_suspend),
398 DEVMETHOD(device_resume, bus_generic_resume),
399
400 /* AGP interface */
401 DEVMETHOD(agp_get_aperture, agp_via_get_aperture),
402 DEVMETHOD(agp_set_aperture, agp_via_set_aperture),
403 DEVMETHOD(agp_bind_page, agp_via_bind_page),
404 DEVMETHOD(agp_unbind_page, agp_via_unbind_page),
405 DEVMETHOD(agp_flush_tlb, agp_via_flush_tlb),
406 DEVMETHOD(agp_enable, agp_generic_enable),
407 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
408 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
409 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
410 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
411 { 0, 0 }
412 };
413
414 static driver_t agp_via_driver = {
415 "agp",
416 agp_via_methods,
417 sizeof(struct agp_via_softc),
418 };
419
420 DRIVER_MODULE(agp_via, hostb, agp_via_driver, 0, 0);
421 MODULE_DEPEND(agp_via, agp, 1, 1, 1);
422 MODULE_DEPEND(agp_via, pci, 1, 1, 1);
423