FreeBSD/Linux Kernel Cross Reference
sys/dev/agp/agp_ati.c
1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2005 Eric Anholt
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 * Based on reading the Linux 2.6.8.1 driver by Dave Jones.
29 */
30
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD: releng/12.0/sys/dev/agp/agp_ati.c 338318 2018-08-25 19:38:08Z alc $");
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/agp/agppriv.h>
45 #include <dev/agp/agpreg.h>
46 #include <dev/pci/pcivar.h>
47 #include <dev/pci/pcireg.h>
48
49 #include <vm/vm.h>
50 #include <vm/vm_extern.h>
51 #include <vm/vm_kern.h>
52 #include <vm/vm_object.h>
53 #include <vm/pmap.h>
54 #include <machine/bus.h>
55 #include <machine/resource.h>
56 #include <sys/rman.h>
57
58 MALLOC_DECLARE(M_AGP);
59
60 #define READ4(off) bus_space_read_4(sc->bst, sc->bsh, off)
61 #define WRITE4(off,v) bus_space_write_4(sc->bst, sc->bsh, off, v)
62
63 struct agp_ati_softc {
64 struct agp_softc agp;
65 struct resource *regs; /* memory mapped control registers */
66 bus_space_tag_t bst; /* bus_space tag */
67 bus_space_handle_t bsh; /* bus_space handle */
68 u_int32_t initial_aperture; /* aperture size at startup */
69 char is_rs300;
70
71 /* The GATT */
72 u_int32_t ag_entries;
73 u_int32_t *ag_virtual; /* virtual address of gatt */
74 u_int32_t *ag_vdir; /* virtual address of page dir */
75 vm_offset_t ag_pdir; /* physical address of page dir */
76 };
77
78
79 static const char*
80 agp_ati_match(device_t dev)
81 {
82 if (pci_get_class(dev) != PCIC_BRIDGE ||
83 pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
84 return NULL;
85
86 if (agp_find_caps(dev) == 0)
87 return NULL;
88
89 switch (pci_get_devid(dev)) {
90 case 0xcab01002:
91 return ("ATI RS100 AGP bridge");
92 case 0xcab21002:
93 return ("ATI RS200 AGP bridge");
94 case 0xcbb21002:
95 return ("ATI RS200M AGP bridge");
96 case 0xcab31002:
97 return ("ATI RS250 AGP bridge");
98 case 0x58301002:
99 return ("ATI RS300_100 AGP bridge");
100 case 0x58311002:
101 return ("ATI RS300_133 AGP bridge");
102 case 0x58321002:
103 return ("ATI RS300_166 AGP bridge");
104 case 0x58331002:
105 return ("ATI RS300_200 AGP bridge");
106 }
107
108 return NULL;
109 }
110
111 static int
112 agp_ati_probe(device_t dev)
113 {
114 const char *desc;
115
116 desc = agp_ati_match(dev);
117 if (desc) {
118 device_set_desc(dev, desc);
119 return 0;
120 }
121
122 return ENXIO;
123 }
124
125 static int
126 agp_ati_alloc_gatt(device_t dev)
127 {
128 struct agp_ati_softc *sc = device_get_softc(dev);
129 u_int32_t apsize = AGP_GET_APERTURE(dev);
130 u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
131 u_int32_t apbase_offset;
132 int i;
133
134 /* Alloc the GATT -- pointers to pages of AGP memory */
135 sc->ag_entries = entries;
136 sc->ag_virtual = (void *)kmem_alloc_attr(entries * sizeof(u_int32_t),
137 M_NOWAIT | M_ZERO, 0, ~0, VM_MEMATTR_WRITE_COMBINING);
138 if (sc->ag_virtual == NULL) {
139 if (bootverbose)
140 device_printf(dev, "GATT allocation failed\n");
141 return ENOMEM;
142 }
143
144 /* Alloc the page directory -- pointers to each page of the GATT */
145 sc->ag_vdir = (void *)kmem_alloc_attr(AGP_PAGE_SIZE, M_NOWAIT | M_ZERO,
146 0, ~0, VM_MEMATTR_WRITE_COMBINING);
147 if (sc->ag_vdir == NULL) {
148 if (bootverbose)
149 device_printf(dev, "pagedir allocation failed\n");
150 kmem_free((vm_offset_t)sc->ag_virtual, entries *
151 sizeof(u_int32_t));
152 return ENOMEM;
153 }
154 sc->ag_pdir = vtophys((vm_offset_t)sc->ag_vdir);
155
156 apbase_offset = pci_read_config(dev, AGP_APBASE, 4) >> 22;
157 /* Fill in the pagedir's pointers to GATT pages */
158 for (i = 0; i < sc->ag_entries / 1024; i++) {
159 vm_offset_t va;
160 vm_offset_t pa;
161
162 va = ((vm_offset_t)sc->ag_virtual) + i * AGP_PAGE_SIZE;
163 pa = vtophys(va);
164 sc->ag_vdir[apbase_offset + i] = pa | 1;
165 }
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 0xcbb21002: /* ATI RS200M AGP bridge */
187 case 0xcab31002: /* ATI RS250 AGP bridge */
188 sc->is_rs300 = 0;
189 apsize_reg = ATI_RS100_APSIZE;
190 agpmode_reg = ATI_RS100_IG_AGPMODE;
191 break;
192 case 0x58301002: /* ATI RS300_100 AGP bridge */
193 case 0x58311002: /* ATI RS300_133 AGP bridge */
194 case 0x58321002: /* ATI RS300_166 AGP bridge */
195 case 0x58331002: /* ATI RS300_200 AGP bridge */
196 sc->is_rs300 = 1;
197 apsize_reg = ATI_RS300_APSIZE;
198 agpmode_reg = ATI_RS300_IG_AGPMODE;
199 break;
200 default:
201 /* Unknown chipset */
202 return EINVAL;
203 }
204
205 rid = ATI_GART_MMADDR;
206 sc->regs = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
207 if (!sc->regs) {
208 agp_generic_detach(dev);
209 return ENOMEM;
210 }
211
212 sc->bst = rman_get_bustag(sc->regs);
213 sc->bsh = rman_get_bushandle(sc->regs);
214
215 sc->initial_aperture = AGP_GET_APERTURE(dev);
216
217 for (;;) {
218 if (agp_ati_alloc_gatt(dev) == 0)
219 break;
220
221 /*
222 * Probably contigmalloc failure. Try reducing the
223 * aperture so that the gatt size reduces.
224 */
225 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2))
226 return ENOMEM;
227 }
228
229 temp = pci_read_config(dev, apsize_reg, 4);
230 pci_write_config(dev, apsize_reg, temp | 1, 4);
231
232 pci_write_config(dev, agpmode_reg, 0x20000, 4);
233
234 WRITE4(ATI_GART_FEATURE_ID, 0x00060000);
235
236 temp = pci_read_config(dev, 4, 4); /* XXX: Magic reg# */
237 pci_write_config(dev, 4, temp | (1 << 14), 4);
238
239 WRITE4(ATI_GART_BASE, sc->ag_pdir);
240
241 AGP_FLUSH_TLB(dev);
242
243 return 0;
244 }
245
246 static int
247 agp_ati_detach(device_t dev)
248 {
249 struct agp_ati_softc *sc = device_get_softc(dev);
250 u_int32_t apsize_reg, temp;
251
252 agp_free_cdev(dev);
253
254 if (sc->is_rs300)
255 apsize_reg = ATI_RS300_APSIZE;
256 else
257 apsize_reg = ATI_RS100_APSIZE;
258
259 /* Clear the GATT base */
260 WRITE4(ATI_GART_BASE, 0);
261
262 /* Put the aperture back the way it started. */
263 AGP_SET_APERTURE(dev, sc->initial_aperture);
264
265 temp = pci_read_config(dev, apsize_reg, 4);
266 pci_write_config(dev, apsize_reg, temp & ~1, 4);
267
268 kmem_free((vm_offset_t)sc->ag_vdir, AGP_PAGE_SIZE);
269 kmem_free((vm_offset_t)sc->ag_virtual, sc->ag_entries *
270 sizeof(u_int32_t));
271
272 bus_release_resource(dev, SYS_RES_MEMORY, ATI_GART_MMADDR, sc->regs);
273 agp_free_res(dev);
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, vm_offset_t offset, vm_offset_t physical)
319 {
320 struct agp_ati_softc *sc = device_get_softc(dev);
321
322 if (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, vm_offset_t offset)
332 {
333 struct agp_ati_softc *sc = device_get_softc(dev);
334
335 if (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, hostb, 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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