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/6.3/sys/pci/agp_ati.c 173886 2007-11-24 19:45:58Z cvs2svn $");
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 0xcbb21002:
93 return ("ATI RS200M AGP bridge");
94 case 0xcab31002:
95 return ("ATI RS250 AGP bridge");
96 case 0x58301002:
97 return ("ATI RS300_100 AGP bridge");
98 case 0x58311002:
99 return ("ATI RS300_133 AGP bridge");
100 case 0x58321002:
101 return ("ATI RS300_166 AGP bridge");
102 case 0x58331002:
103 return ("ATI RS300_200 AGP bridge");
104 };
105
106 return NULL;
107 }
108
109 static int
110 agp_ati_probe(device_t dev)
111 {
112 const char *desc;
113
114 desc = agp_ati_match(dev);
115 if (desc) {
116 device_verbose(dev);
117 device_set_desc(dev, desc);
118 return 0;
119 }
120
121 return ENXIO;
122 }
123
124 static int
125 agp_ati_alloc_gatt(device_t dev)
126 {
127 struct agp_ati_softc *sc = device_get_softc(dev);
128 u_int32_t apsize = AGP_GET_APERTURE(dev);
129 u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
130 u_int32_t apbase_offset;
131 int i;
132
133 /* Alloc the GATT -- pointers to pages of AGP memory */
134 sc->ag_entries = entries;
135 sc->ag_virtual = malloc(entries * sizeof(u_int32_t), M_AGP,
136 M_NOWAIT | M_ZERO);
137 if (sc->ag_virtual == NULL) {
138 if (bootverbose)
139 device_printf(dev, "aperture allocation failed\n");
140 return ENOMEM;
141 }
142
143 /* Alloc the page directory -- pointers to each page of the GATT */
144 sc->ag_vdir = malloc(AGP_PAGE_SIZE, M_AGP, M_NOWAIT | M_ZERO);
145 if (sc->ag_vdir == NULL) {
146 if (bootverbose)
147 device_printf(dev, "pagedir allocation failed\n");
148 free(sc->ag_virtual, M_AGP);
149 return ENOMEM;
150 }
151 sc->ag_pdir = vtophys((vm_offset_t)sc->ag_vdir);
152
153 apbase_offset = pci_read_config(dev, AGP_APBASE, 4) >> 22;
154 /* Fill in the pagedir's pointers to GATT pages */
155 for (i = 0; i < sc->ag_entries / 1024; i++) {
156 vm_offset_t va;
157 vm_offset_t pa;
158
159 va = ((vm_offset_t)sc->ag_virtual) + i * AGP_PAGE_SIZE;
160 pa = vtophys(va);
161 sc->ag_vdir[apbase_offset + i] = pa | 1;
162 }
163
164 /*
165 * Make sure the chipset can see everything.
166 */
167 agp_flush_cache();
168
169 return 0;
170 }
171
172
173 static int
174 agp_ati_attach(device_t dev)
175 {
176 struct agp_ati_softc *sc = device_get_softc(dev);
177 int error, rid;
178 u_int32_t temp;
179 u_int32_t apsize_reg, agpmode_reg;
180
181 error = agp_generic_attach(dev);
182 if (error)
183 return error;
184
185 switch (pci_get_devid(dev)) {
186 case 0xcab01002: /* ATI RS100 AGP bridge */
187 case 0xcab21002: /* ATI RS200 AGP bridge */
188 case 0xcbb21002: /* ATI RS200M AGP bridge */
189 case 0xcab31002: /* ATI RS250 AGP bridge */
190 sc->is_rs300 = 0;
191 apsize_reg = ATI_RS100_APSIZE;
192 agpmode_reg = ATI_RS100_IG_AGPMODE;
193 break;
194 case 0x58301002: /* ATI RS300_100 AGP bridge */
195 case 0x58311002: /* ATI RS300_133 AGP bridge */
196 case 0x58321002: /* ATI RS300_166 AGP bridge */
197 case 0x58331002: /* ATI RS300_200 AGP bridge */
198 sc->is_rs300 = 1;
199 apsize_reg = ATI_RS300_APSIZE;
200 agpmode_reg = ATI_RS300_IG_AGPMODE;
201 break;
202 default:
203 /* Unknown chipset */
204 return EINVAL;
205 };
206
207 rid = ATI_GART_MMADDR;
208 sc->regs = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
209 if (!sc->regs) {
210 agp_generic_detach(dev);
211 return ENOMEM;
212 }
213
214 sc->bst = rman_get_bustag(sc->regs);
215 sc->bsh = rman_get_bushandle(sc->regs);
216
217 sc->initial_aperture = AGP_GET_APERTURE(dev);
218
219 for (;;) {
220 if (agp_ati_alloc_gatt(dev) == 0)
221 break;
222
223 /*
224 * Probably contigmalloc failure. Try reducing the
225 * aperture so that the gatt size reduces.
226 */
227 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2))
228 return ENOMEM;
229 }
230
231 temp = pci_read_config(dev, apsize_reg, 4);
232 pci_write_config(dev, apsize_reg, temp | 1, 4);
233
234 pci_write_config(dev, agpmode_reg, 0x20000, 4);
235
236 WRITE4(ATI_GART_FEATURE_ID, 0x00060000);
237
238 temp = pci_read_config(dev, 4, 4); /* XXX: Magic reg# */
239 pci_write_config(dev, 4, temp | (1 << 14), 4);
240
241 WRITE4(ATI_GART_BASE, sc->ag_pdir);
242
243 AGP_FLUSH_TLB(dev);
244
245 return 0;
246 }
247
248 static int
249 agp_ati_detach(device_t dev)
250 {
251 struct agp_ati_softc *sc = device_get_softc(dev);
252 u_int32_t apsize_reg, temp;
253
254 agp_free_cdev(dev);
255
256 if (sc->is_rs300)
257 apsize_reg = ATI_RS300_APSIZE;
258 else
259 apsize_reg = ATI_RS100_APSIZE;
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 agp_free_res(dev);
275
276 return 0;
277 }
278
279 static u_int32_t
280 agp_ati_get_aperture(device_t dev)
281 {
282 struct agp_ati_softc *sc = device_get_softc(dev);
283 int size_value;
284
285 if (sc->is_rs300)
286 size_value = pci_read_config(dev, ATI_RS300_APSIZE, 4);
287 else
288 size_value = pci_read_config(dev, ATI_RS100_APSIZE, 4);
289
290 size_value = (size_value & 0x0000000e) >> 1;
291 size_value = (32 * 1024 * 1024) << size_value;
292
293 return size_value;
294 }
295
296 static int
297 agp_ati_set_aperture(device_t dev, u_int32_t aperture)
298 {
299 struct agp_ati_softc *sc = device_get_softc(dev);
300 int size_value;
301 u_int32_t apsize_reg;
302
303 if (sc->is_rs300)
304 apsize_reg = ATI_RS300_APSIZE;
305 else
306 apsize_reg = ATI_RS100_APSIZE;
307
308 size_value = pci_read_config(dev, apsize_reg, 4);
309
310 size_value &= ~0x0000000e;
311 size_value |= (ffs(aperture / (32 * 1024 * 1024)) - 1) << 1;
312
313 pci_write_config(dev, apsize_reg, size_value, 4);
314
315 return 0;
316 }
317
318 static int
319 agp_ati_bind_page(device_t dev, int offset, vm_offset_t physical)
320 {
321 struct agp_ati_softc *sc = device_get_softc(dev);
322
323 if (offset < 0 || offset >= (sc->ag_entries << AGP_PAGE_SHIFT))
324 return EINVAL;
325
326 sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 1;
327
328 return 0;
329 }
330
331 static int
332 agp_ati_unbind_page(device_t dev, int offset)
333 {
334 struct agp_ati_softc *sc = device_get_softc(dev);
335
336 if (offset < 0 || offset >= (sc->ag_entries << AGP_PAGE_SHIFT))
337 return EINVAL;
338
339 sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
340 return 0;
341 }
342
343 static void
344 agp_ati_flush_tlb(device_t dev)
345 {
346 struct agp_ati_softc *sc = device_get_softc(dev);
347
348 /* Set the cache invalidate bit and wait for the chipset to clear */
349 WRITE4(ATI_GART_CACHE_CNTRL, 1);
350 (void)READ4(ATI_GART_CACHE_CNTRL);
351 }
352
353 static device_method_t agp_ati_methods[] = {
354 /* Device interface */
355 DEVMETHOD(device_probe, agp_ati_probe),
356 DEVMETHOD(device_attach, agp_ati_attach),
357 DEVMETHOD(device_detach, agp_ati_detach),
358 DEVMETHOD(device_shutdown, bus_generic_shutdown),
359 DEVMETHOD(device_suspend, bus_generic_suspend),
360 DEVMETHOD(device_resume, bus_generic_resume),
361
362 /* AGP interface */
363 DEVMETHOD(agp_get_aperture, agp_ati_get_aperture),
364 DEVMETHOD(agp_set_aperture, agp_ati_set_aperture),
365 DEVMETHOD(agp_bind_page, agp_ati_bind_page),
366 DEVMETHOD(agp_unbind_page, agp_ati_unbind_page),
367 DEVMETHOD(agp_flush_tlb, agp_ati_flush_tlb),
368 DEVMETHOD(agp_enable, agp_generic_enable),
369 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
370 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
371 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
372 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
373
374 { 0, 0 }
375 };
376
377 static driver_t agp_ati_driver = {
378 "agp",
379 agp_ati_methods,
380 sizeof(struct agp_ati_softc),
381 };
382
383 static devclass_t agp_devclass;
384
385 DRIVER_MODULE(agp_ati, pci, agp_ati_driver, agp_devclass, 0, 0);
386 MODULE_DEPEND(agp_ati, agp, 1, 1, 1);
387 MODULE_DEPEND(agp_ati, pci, 1, 1, 1);
Cache object: 75b68d0a3bed6288ebbbda909f2c54ad
|