FreeBSD/Linux Kernel Cross Reference
sys/pci/agp_ati.c
1 /*-
2 * Copyright (c) 2005 Eric Anholt
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 * Based on reading the Linux 2.6.8.1 driver by Dave Jones.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD: releng/6.2/sys/pci/agp_ati.c 152434 2005-11-14 21:14:14Z anholt $");
31
32 #include "opt_bus.h"
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/malloc.h>
37 #include <sys/kernel.h>
38 #include <sys/module.h>
39 #include <sys/bus.h>
40 #include <sys/lock.h>
41 #include <sys/mutex.h>
42 #include <sys/proc.h>
43
44 #include <dev/pci/pcivar.h>
45 #include <dev/pci/pcireg.h>
46 #include <pci/agppriv.h>
47 #include <pci/agpreg.h>
48
49 #include <vm/vm.h>
50 #include <vm/vm_object.h>
51 #include <vm/pmap.h>
52 #include <machine/bus.h>
53 #include <machine/resource.h>
54 #include <sys/rman.h>
55
56 MALLOC_DECLARE(M_AGP);
57
58 #define READ4(off) bus_space_read_4(sc->bst, sc->bsh, off)
59 #define WRITE4(off,v) bus_space_write_4(sc->bst, sc->bsh, off, v)
60
61 struct agp_ati_softc {
62 struct agp_softc agp;
63 struct resource *regs; /* memory mapped control registers */
64 bus_space_tag_t bst; /* bus_space tag */
65 bus_space_handle_t bsh; /* bus_space handle */
66 u_int32_t initial_aperture; /* aperture size at startup */
67 char is_rs300;
68
69 /* The GATT */
70 u_int32_t ag_entries;
71 u_int32_t *ag_virtual; /* virtual address of gatt */
72 u_int32_t *ag_vdir; /* virtual address of page dir */
73 vm_offset_t ag_pdir; /* physical address of page dir */
74 };
75
76
77 static const char*
78 agp_ati_match(device_t dev)
79 {
80 if (pci_get_class(dev) != PCIC_BRIDGE ||
81 pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
82 return NULL;
83
84 if (agp_find_caps(dev) == 0)
85 return NULL;
86
87 switch (pci_get_devid(dev)) {
88 case 0xcab01002:
89 return ("ATI RS100 AGP bridge");
90 case 0xcab21002:
91 return ("ATI RS200 AGP bridge");
92 case 0xcab31002:
93 return ("ATI RS250 AGP bridge");
94 case 0x58301002:
95 return ("ATI RS300_100 AGP bridge");
96 case 0x58311002:
97 return ("ATI RS300_133 AGP bridge");
98 case 0x58321002:
99 return ("ATI RS300_166 AGP bridge");
100 case 0x58331002:
101 return ("ATI RS300_200 AGP bridge");
102 };
103
104 return NULL;
105 }
106
107 static int
108 agp_ati_probe(device_t dev)
109 {
110 const char *desc;
111
112 desc = agp_ati_match(dev);
113 if (desc) {
114 device_verbose(dev);
115 device_set_desc(dev, desc);
116 return 0;
117 }
118
119 return ENXIO;
120 }
121
122 static int
123 agp_ati_alloc_gatt(device_t dev)
124 {
125 struct agp_ati_softc *sc = device_get_softc(dev);
126 u_int32_t apsize = AGP_GET_APERTURE(dev);
127 u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
128 u_int32_t apbase_offset;
129 int i;
130
131 /* Alloc the GATT -- pointers to pages of AGP memory */
132 sc->ag_entries = entries;
133 sc->ag_virtual = malloc(entries * sizeof(u_int32_t), M_AGP,
134 M_NOWAIT | M_ZERO);
135 if (sc->ag_virtual == NULL) {
136 if (bootverbose)
137 device_printf(dev, "aperture allocation failed\n");
138 return ENOMEM;
139 }
140
141 /* Alloc the page directory -- pointers to each page of the GATT */
142 sc->ag_vdir = malloc(AGP_PAGE_SIZE, M_AGP, M_NOWAIT | M_ZERO);
143 if (sc->ag_vdir == NULL) {
144 if (bootverbose)
145 device_printf(dev, "pagedir allocation failed\n");
146 free(sc->ag_virtual, M_AGP);
147 return ENOMEM;
148 }
149 sc->ag_pdir = vtophys((vm_offset_t)sc->ag_vdir);
150
151 apbase_offset = pci_read_config(dev, AGP_APBASE, 4) >> 22;
152 /* Fill in the pagedir's pointers to GATT pages */
153 for (i = 0; i < sc->ag_entries / 1024; i++) {
154 vm_offset_t va;
155 vm_offset_t pa;
156
157 va = ((vm_offset_t)sc->ag_virtual) + i * AGP_PAGE_SIZE;
158 pa = vtophys(va);
159 sc->ag_vdir[apbase_offset + i] = pa | 1;
160 }
161
162 /*
163 * Make sure the chipset can see everything.
164 */
165 agp_flush_cache();
166
167 return 0;
168 }
169
170
171 static int
172 agp_ati_attach(device_t dev)
173 {
174 struct agp_ati_softc *sc = device_get_softc(dev);
175 int error, rid;
176 u_int32_t temp;
177 u_int32_t apsize_reg, agpmode_reg;
178
179 error = agp_generic_attach(dev);
180 if (error)
181 return error;
182
183 switch (pci_get_devid(dev)) {
184 case 0xcab01002: /* ATI RS100 AGP bridge */
185 case 0xcab21002: /*ATI RS200 AGP bridge */
186 case 0xcab31002: /* ATI RS250 AGP bridge */
187 sc->is_rs300 = 0;
188 apsize_reg = ATI_RS100_APSIZE;
189 agpmode_reg = ATI_RS100_IG_AGPMODE;
190 break;
191 case 0x58301002: /* ATI RS300_100 AGP bridge */
192 case 0x58311002: /* ATI RS300_133 AGP bridge */
193 case 0x58321002: /* ATI RS300_166 AGP bridge */
194 case 0x58331002: /* ATI RS300_200 AGP bridge */
195 sc->is_rs300 = 1;
196 apsize_reg = ATI_RS300_APSIZE;
197 agpmode_reg = ATI_RS300_IG_AGPMODE;
198 break;
199 default:
200 /* Unknown chipset */
201 return EINVAL;
202 };
203
204 rid = ATI_GART_MMADDR;
205 sc->regs = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
206 if (!sc->regs) {
207 agp_generic_detach(dev);
208 return ENOMEM;
209 }
210
211 sc->bst = rman_get_bustag(sc->regs);
212 sc->bsh = rman_get_bushandle(sc->regs);
213
214 sc->initial_aperture = AGP_GET_APERTURE(dev);
215
216 for (;;) {
217 if (agp_ati_alloc_gatt(dev) == 0)
218 break;
219
220 /*
221 * Probably contigmalloc failure. Try reducing the
222 * aperture so that the gatt size reduces.
223 */
224 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2))
225 return ENOMEM;
226 }
227
228 temp = pci_read_config(dev, apsize_reg, 4);
229 pci_write_config(dev, apsize_reg, temp | 1, 4);
230
231 pci_write_config(dev, agpmode_reg, 0x20000, 4);
232
233 WRITE4(ATI_GART_FEATURE_ID, 0x00060000);
234
235 temp = pci_read_config(dev, 4, 4); /* XXX: Magic reg# */
236 pci_write_config(dev, 4, temp | (1 << 14), 4);
237
238 WRITE4(ATI_GART_BASE, sc->ag_pdir);
239
240 AGP_FLUSH_TLB(dev);
241
242 return 0;
243 }
244
245 static int
246 agp_ati_detach(device_t dev)
247 {
248 struct agp_ati_softc *sc = device_get_softc(dev);
249 int error;
250 u_int32_t apsize_reg, temp;
251
252 if (sc->is_rs300)
253 apsize_reg = ATI_RS300_APSIZE;
254 else
255 apsize_reg = ATI_RS100_APSIZE;
256
257 error = agp_generic_detach(dev);
258 if (error)
259 return error;
260
261 /* Clear the GATT base */
262 WRITE4(ATI_GART_BASE, 0);
263
264 /* Put the aperture back the way it started. */
265 AGP_SET_APERTURE(dev, sc->initial_aperture);
266
267 temp = pci_read_config(dev, apsize_reg, 4);
268 pci_write_config(dev, apsize_reg, temp & ~1, 4);
269
270 free(sc->ag_vdir, M_AGP);
271 free(sc->ag_virtual, M_AGP);
272
273 bus_release_resource(dev, SYS_RES_MEMORY, ATI_GART_MMADDR, sc->regs);
274
275 return 0;
276 }
277
278 static u_int32_t
279 agp_ati_get_aperture(device_t dev)
280 {
281 struct agp_ati_softc *sc = device_get_softc(dev);
282 int size_value;
283
284 if (sc->is_rs300)
285 size_value = pci_read_config(dev, ATI_RS300_APSIZE, 4);
286 else
287 size_value = pci_read_config(dev, ATI_RS100_APSIZE, 4);
288
289 size_value = (size_value & 0x0000000e) >> 1;
290 size_value = (32 * 1024 * 1024) << size_value;
291
292 return size_value;
293 }
294
295 static int
296 agp_ati_set_aperture(device_t dev, u_int32_t aperture)
297 {
298 struct agp_ati_softc *sc = device_get_softc(dev);
299 int size_value;
300 u_int32_t apsize_reg;
301
302 if (sc->is_rs300)
303 apsize_reg = ATI_RS300_APSIZE;
304 else
305 apsize_reg = ATI_RS100_APSIZE;
306
307 size_value = pci_read_config(dev, apsize_reg, 4);
308
309 size_value &= ~0x0000000e;
310 size_value |= (ffs(aperture / (32 * 1024 * 1024)) - 1) << 1;
311
312 pci_write_config(dev, apsize_reg, size_value, 4);
313
314 return 0;
315 }
316
317 static int
318 agp_ati_bind_page(device_t dev, int offset, vm_offset_t physical)
319 {
320 struct agp_ati_softc *sc = device_get_softc(dev);
321
322 if (offset < 0 || offset >= (sc->ag_entries << AGP_PAGE_SHIFT))
323 return EINVAL;
324
325 sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 1;
326
327 return 0;
328 }
329
330 static int
331 agp_ati_unbind_page(device_t dev, int offset)
332 {
333 struct agp_ati_softc *sc = device_get_softc(dev);
334
335 if (offset < 0 || offset >= (sc->ag_entries << AGP_PAGE_SHIFT))
336 return EINVAL;
337
338 sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
339 return 0;
340 }
341
342 static void
343 agp_ati_flush_tlb(device_t dev)
344 {
345 struct agp_ati_softc *sc = device_get_softc(dev);
346
347 /* Set the cache invalidate bit and wait for the chipset to clear */
348 WRITE4(ATI_GART_CACHE_CNTRL, 1);
349 (void)READ4(ATI_GART_CACHE_CNTRL);
350 }
351
352 static device_method_t agp_ati_methods[] = {
353 /* Device interface */
354 DEVMETHOD(device_probe, agp_ati_probe),
355 DEVMETHOD(device_attach, agp_ati_attach),
356 DEVMETHOD(device_detach, agp_ati_detach),
357 DEVMETHOD(device_shutdown, bus_generic_shutdown),
358 DEVMETHOD(device_suspend, bus_generic_suspend),
359 DEVMETHOD(device_resume, bus_generic_resume),
360
361 /* AGP interface */
362 DEVMETHOD(agp_get_aperture, agp_ati_get_aperture),
363 DEVMETHOD(agp_set_aperture, agp_ati_set_aperture),
364 DEVMETHOD(agp_bind_page, agp_ati_bind_page),
365 DEVMETHOD(agp_unbind_page, agp_ati_unbind_page),
366 DEVMETHOD(agp_flush_tlb, agp_ati_flush_tlb),
367 DEVMETHOD(agp_enable, agp_generic_enable),
368 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
369 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
370 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
371 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
372
373 { 0, 0 }
374 };
375
376 static driver_t agp_ati_driver = {
377 "agp",
378 agp_ati_methods,
379 sizeof(struct agp_ati_softc),
380 };
381
382 static devclass_t agp_devclass;
383
384 DRIVER_MODULE(agp_ati, pci, agp_ati_driver, agp_devclass, 0, 0);
385 MODULE_DEPEND(agp_ati, agp, 1, 1, 1);
386 MODULE_DEPEND(agp_ati, pci, 1, 1, 1);
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