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>
|
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#include <machine/bus.h>
51#include <machine/resource.h>
52#include <sys/rman.h>
53
54MALLOC_DECLARE(M_AGP);
55
56#define READ2(off) bus_space_read_2(sc->bst, sc->bsh, off)
57#define READ4(off) bus_space_read_4(sc->bst, sc->bsh, off)
58#define WRITE2(off,v) bus_space_write_2(sc->bst, sc->bsh, off, v)
59#define WRITE4(off,v) bus_space_write_4(sc->bst, sc->bsh, off, v)
60
61struct agp_amd_gatt {
62 u_int32_t ag_entries;
63 u_int32_t *ag_virtual; /* virtual address of gatt */
64 vm_offset_t ag_physical;
65 u_int32_t *ag_vdir; /* virtual address of page dir */
66 vm_offset_t ag_pdir; /* physical address of page dir */
67};
68
69struct agp_amd_softc {
70 struct agp_softc agp;
71 struct resource *regs; /* memory mapped control registers */
72 bus_space_tag_t bst; /* bus_space tag */
73 bus_space_handle_t bsh; /* bus_space handle */
74 u_int32_t initial_aperture; /* aperture size at startup */
75 struct agp_amd_gatt *gatt;
76};
77
78static struct agp_amd_gatt *
79agp_amd_alloc_gatt(device_t dev)
80{
81 u_int32_t apsize = AGP_GET_APERTURE(dev);
82 u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
83 struct agp_amd_gatt *gatt;
84 int i, npages, pdir_offset;
85
86 if (bootverbose)
87 device_printf(dev,
88 "allocating GATT for aperture of size %dM\n",
89 apsize / (1024*1024));
90
91 gatt = malloc(sizeof(struct agp_amd_gatt), M_AGP, M_NOWAIT);
92 if (!gatt)
93 return 0;
94
95 /*
96 * The AMD751 uses a page directory to map a non-contiguous
97 * gatt so we don't need to use contigmalloc.
98 * Malloc individual gatt pages and map them into the page
99 * directory.
100 */
101 gatt->ag_entries = entries;
102 gatt->ag_virtual = malloc(entries * sizeof(u_int32_t),
103 M_AGP, M_NOWAIT);
104 if (!gatt->ag_virtual) {
105 if (bootverbose)
106 device_printf(dev, "allocation failed\n");
107 free(gatt, M_AGP);
108 return 0;
109 }
110 bzero(gatt->ag_virtual, entries * sizeof(u_int32_t));
111
112 /*
113 * Allocate the page directory.
114 */
115 gatt->ag_vdir = malloc(AGP_PAGE_SIZE, M_AGP, M_NOWAIT);
116 if (!gatt->ag_vdir) {
117 if (bootverbose)
118 device_printf(dev,
119 "failed to allocate page directory\n");
120 free(gatt->ag_virtual, M_AGP);
121 free(gatt, M_AGP);
122 return 0;
123 }
124 bzero(gatt->ag_vdir, AGP_PAGE_SIZE);
125
126 gatt->ag_pdir = vtophys((vm_offset_t) gatt->ag_vdir);
127 if(bootverbose)
128 device_printf(dev, "gatt -> ag_pdir %#lx\n",
129 (u_long)gatt->ag_pdir);
130 /*
131 * Allocate the gatt pages
132 */
133 gatt->ag_entries = entries;
134 if(bootverbose)
135 device_printf(dev, "allocating GATT for %d AGP page entries\n",
136 gatt->ag_entries);
137
138 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
139
140 /*
141 * Map the pages of the GATT into the page directory.
142 *
143 * The GATT page addresses are mapped into the directory offset by
144 * an amount dependent on the base address of the aperture. This
145 * is and offset into the page directory, not an offset added to
146 * the addresses of the gatt pages.
147 */
148
149 pdir_offset = pci_read_config(dev, AGP_AMD751_APBASE, 4) >> 22;
150
151 npages = ((entries * sizeof(u_int32_t) + AGP_PAGE_SIZE - 1)
152 >> AGP_PAGE_SHIFT);
153
154 for (i = 0; i < npages; i++) {
155 vm_offset_t va;
156 vm_offset_t pa;
157
158 va = ((vm_offset_t) gatt->ag_virtual) + i * AGP_PAGE_SIZE;
159 pa = vtophys(va);
160 gatt->ag_vdir[i + pdir_offset] = pa | 1;
161 }
162
163 /*
164 * Make sure the chipset can see everything.
165 */
166 agp_flush_cache();
167
168 return gatt;
169}
170
171static void
172agp_amd_free_gatt(struct agp_amd_gatt *gatt)
173{
174 free(gatt->ag_virtual, M_AGP);
175 free(gatt->ag_vdir, M_AGP);
176 free(gatt, M_AGP);
177}
178
179static const char*
180agp_amd_match(device_t dev)
181{
182 if (pci_get_class(dev) != PCIC_BRIDGE
183 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
184 return NULL;
185
186 if (agp_find_caps(dev) == 0)
187 return NULL;
188
189 switch (pci_get_devid(dev)) {
190 case 0x70061022:
191 return ("AMD 751 host to AGP bridge");
192 case 0x700e1022:
193 return ("AMD 761 host to AGP bridge");
194 case 0x700c1022:
195 return ("AMD 762 host to AGP bridge");
196 };
197
198 return NULL;
199}
200
201static int
202agp_amd_probe(device_t dev)
203{
204 const char *desc;
205
| 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#include <machine/bus.h>
51#include <machine/resource.h>
52#include <sys/rman.h>
53
54MALLOC_DECLARE(M_AGP);
55
56#define READ2(off) bus_space_read_2(sc->bst, sc->bsh, off)
57#define READ4(off) bus_space_read_4(sc->bst, sc->bsh, off)
58#define WRITE2(off,v) bus_space_write_2(sc->bst, sc->bsh, off, v)
59#define WRITE4(off,v) bus_space_write_4(sc->bst, sc->bsh, off, v)
60
61struct agp_amd_gatt {
62 u_int32_t ag_entries;
63 u_int32_t *ag_virtual; /* virtual address of gatt */
64 vm_offset_t ag_physical;
65 u_int32_t *ag_vdir; /* virtual address of page dir */
66 vm_offset_t ag_pdir; /* physical address of page dir */
67};
68
69struct agp_amd_softc {
70 struct agp_softc agp;
71 struct resource *regs; /* memory mapped control registers */
72 bus_space_tag_t bst; /* bus_space tag */
73 bus_space_handle_t bsh; /* bus_space handle */
74 u_int32_t initial_aperture; /* aperture size at startup */
75 struct agp_amd_gatt *gatt;
76};
77
78static struct agp_amd_gatt *
79agp_amd_alloc_gatt(device_t dev)
80{
81 u_int32_t apsize = AGP_GET_APERTURE(dev);
82 u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
83 struct agp_amd_gatt *gatt;
84 int i, npages, pdir_offset;
85
86 if (bootverbose)
87 device_printf(dev,
88 "allocating GATT for aperture of size %dM\n",
89 apsize / (1024*1024));
90
91 gatt = malloc(sizeof(struct agp_amd_gatt), M_AGP, M_NOWAIT);
92 if (!gatt)
93 return 0;
94
95 /*
96 * The AMD751 uses a page directory to map a non-contiguous
97 * gatt so we don't need to use contigmalloc.
98 * Malloc individual gatt pages and map them into the page
99 * directory.
100 */
101 gatt->ag_entries = entries;
102 gatt->ag_virtual = malloc(entries * sizeof(u_int32_t),
103 M_AGP, M_NOWAIT);
104 if (!gatt->ag_virtual) {
105 if (bootverbose)
106 device_printf(dev, "allocation failed\n");
107 free(gatt, M_AGP);
108 return 0;
109 }
110 bzero(gatt->ag_virtual, entries * sizeof(u_int32_t));
111
112 /*
113 * Allocate the page directory.
114 */
115 gatt->ag_vdir = malloc(AGP_PAGE_SIZE, M_AGP, M_NOWAIT);
116 if (!gatt->ag_vdir) {
117 if (bootverbose)
118 device_printf(dev,
119 "failed to allocate page directory\n");
120 free(gatt->ag_virtual, M_AGP);
121 free(gatt, M_AGP);
122 return 0;
123 }
124 bzero(gatt->ag_vdir, AGP_PAGE_SIZE);
125
126 gatt->ag_pdir = vtophys((vm_offset_t) gatt->ag_vdir);
127 if(bootverbose)
128 device_printf(dev, "gatt -> ag_pdir %#lx\n",
129 (u_long)gatt->ag_pdir);
130 /*
131 * Allocate the gatt pages
132 */
133 gatt->ag_entries = entries;
134 if(bootverbose)
135 device_printf(dev, "allocating GATT for %d AGP page entries\n",
136 gatt->ag_entries);
137
138 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
139
140 /*
141 * Map the pages of the GATT into the page directory.
142 *
143 * The GATT page addresses are mapped into the directory offset by
144 * an amount dependent on the base address of the aperture. This
145 * is and offset into the page directory, not an offset added to
146 * the addresses of the gatt pages.
147 */
148
149 pdir_offset = pci_read_config(dev, AGP_AMD751_APBASE, 4) >> 22;
150
151 npages = ((entries * sizeof(u_int32_t) + AGP_PAGE_SIZE - 1)
152 >> AGP_PAGE_SHIFT);
153
154 for (i = 0; i < npages; i++) {
155 vm_offset_t va;
156 vm_offset_t pa;
157
158 va = ((vm_offset_t) gatt->ag_virtual) + i * AGP_PAGE_SIZE;
159 pa = vtophys(va);
160 gatt->ag_vdir[i + pdir_offset] = pa | 1;
161 }
162
163 /*
164 * Make sure the chipset can see everything.
165 */
166 agp_flush_cache();
167
168 return gatt;
169}
170
171static void
172agp_amd_free_gatt(struct agp_amd_gatt *gatt)
173{
174 free(gatt->ag_virtual, M_AGP);
175 free(gatt->ag_vdir, M_AGP);
176 free(gatt, M_AGP);
177}
178
179static const char*
180agp_amd_match(device_t dev)
181{
182 if (pci_get_class(dev) != PCIC_BRIDGE
183 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
184 return NULL;
185
186 if (agp_find_caps(dev) == 0)
187 return NULL;
188
189 switch (pci_get_devid(dev)) {
190 case 0x70061022:
191 return ("AMD 751 host to AGP bridge");
192 case 0x700e1022:
193 return ("AMD 761 host to AGP bridge");
194 case 0x700c1022:
195 return ("AMD 762 host to AGP bridge");
196 };
197
198 return NULL;
199}
200
201static int
202agp_amd_probe(device_t dev)
203{
204 const char *desc;
205
|
206 desc = agp_amd_match(dev);
207 if (desc) {
208 device_set_desc(dev, desc);
209 return BUS_PROBE_DEFAULT;
210 }
211
212 return ENXIO;
213}
214
215static int
216agp_amd_attach(device_t dev)
217{
218 struct agp_amd_softc *sc = device_get_softc(dev);
219 struct agp_amd_gatt *gatt;
220 int error, rid;
221
222 error = agp_generic_attach(dev);
223 if (error)
224 return error;
225
226 rid = AGP_AMD751_REGISTERS;
227 sc->regs = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
228 RF_ACTIVE);
229 if (!sc->regs) {
230 agp_generic_detach(dev);
231 return ENOMEM;
232 }
233
234 sc->bst = rman_get_bustag(sc->regs);
235 sc->bsh = rman_get_bushandle(sc->regs);
236
237 sc->initial_aperture = AGP_GET_APERTURE(dev);
238
239 for (;;) {
240 gatt = agp_amd_alloc_gatt(dev);
241 if (gatt)
242 break;
243
244 /*
245 * Probably contigmalloc failure. Try reducing the
246 * aperture so that the gatt size reduces.
247 */
248 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2))
249 return ENOMEM;
250 }
251 sc->gatt = gatt;
252
253 /* Install the gatt. */
254 WRITE4(AGP_AMD751_ATTBASE, gatt->ag_pdir);
255
256 /* Enable synchronisation between host and agp. */
257 pci_write_config(dev,
258 AGP_AMD751_MODECTRL,
259 AGP_AMD751_MODECTRL_SYNEN, 1);
260
261 /* Set indexing mode for two-level and enable page dir cache */
262 pci_write_config(dev,
263 AGP_AMD751_MODECTRL2,
264 AGP_AMD751_MODECTRL2_GPDCE, 1);
265
266 /* Enable the TLB and flush */
267 WRITE2(AGP_AMD751_STATUS,
268 READ2(AGP_AMD751_STATUS) | AGP_AMD751_STATUS_GCE);
269 AGP_FLUSH_TLB(dev);
270
271 return 0;
272}
273
274static int
275agp_amd_detach(device_t dev)
276{
277 struct agp_amd_softc *sc = device_get_softc(dev);
278
279 agp_free_cdev(dev);
280
281 /* Disable the TLB.. */
282 WRITE2(AGP_AMD751_STATUS,
283 READ2(AGP_AMD751_STATUS) & ~AGP_AMD751_STATUS_GCE);
284
285 /* Disable host-agp sync */
286 pci_write_config(dev, AGP_AMD751_MODECTRL, 0x00, 1);
287
288 /* Clear the GATT base */
289 WRITE4(AGP_AMD751_ATTBASE, 0);
290
291 /* Put the aperture back the way it started. */
292 AGP_SET_APERTURE(dev, sc->initial_aperture);
293
294 agp_amd_free_gatt(sc->gatt);
295 agp_free_res(dev);
296
297 bus_release_resource(dev, SYS_RES_MEMORY,
298 AGP_AMD751_REGISTERS, sc->regs);
299
300 return 0;
301}
302
303static u_int32_t
304agp_amd_get_aperture(device_t dev)
305{
306 int vas;
307
308 /*
309 * The aperture size is equal to 32M<<vas.
310 */
311 vas = (pci_read_config(dev, AGP_AMD751_APCTRL, 1) & 0x06) >> 1;
312 return (32*1024*1024) << vas;
313}
314
315static int
316agp_amd_set_aperture(device_t dev, u_int32_t aperture)
317{
318 int vas;
319
320 /*
321 * Check for a power of two and make sure its within the
322 * programmable range.
323 */
324 if (aperture & (aperture - 1)
325 || aperture < 32*1024*1024
326 || aperture > 2U*1024*1024*1024)
327 return EINVAL;
328
329 vas = ffs(aperture / 32*1024*1024) - 1;
330
331 /*
332 * While the size register is bits 1-3 of APCTRL, bit 0 must be
333 * set for the size value to be 'valid'
334 */
335 pci_write_config(dev, AGP_AMD751_APCTRL,
336 (((pci_read_config(dev, AGP_AMD751_APCTRL, 1) & ~0x06)
337 | ((vas << 1) | 1))), 1);
338
339 return 0;
340}
341
342static int
343agp_amd_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
344{
345 struct agp_amd_softc *sc = device_get_softc(dev);
346
347 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
348 return EINVAL;
349
350 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 1;
351
352 /* invalidate the cache */
353 AGP_FLUSH_TLB(dev);
354 return 0;
355}
356
357static int
358agp_amd_unbind_page(device_t dev, vm_offset_t offset)
359{
360 struct agp_amd_softc *sc = device_get_softc(dev);
361
362 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
363 return EINVAL;
364
365 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
366 return 0;
367}
368
369static void
370agp_amd_flush_tlb(device_t dev)
371{
372 struct agp_amd_softc *sc = device_get_softc(dev);
373
374 /* Set the cache invalidate bit and wait for the chipset to clear */
375 WRITE4(AGP_AMD751_TLBCTRL, 1);
376 do {
377 DELAY(1);
378 } while (READ4(AGP_AMD751_TLBCTRL));
379}
380
381static device_method_t agp_amd_methods[] = {
382 /* Device interface */
383 DEVMETHOD(device_probe, agp_amd_probe),
384 DEVMETHOD(device_attach, agp_amd_attach),
385 DEVMETHOD(device_detach, agp_amd_detach),
386 DEVMETHOD(device_shutdown, bus_generic_shutdown),
387 DEVMETHOD(device_suspend, bus_generic_suspend),
388 DEVMETHOD(device_resume, bus_generic_resume),
389
390 /* AGP interface */
391 DEVMETHOD(agp_get_aperture, agp_amd_get_aperture),
392 DEVMETHOD(agp_set_aperture, agp_amd_set_aperture),
393 DEVMETHOD(agp_bind_page, agp_amd_bind_page),
394 DEVMETHOD(agp_unbind_page, agp_amd_unbind_page),
395 DEVMETHOD(agp_flush_tlb, agp_amd_flush_tlb),
396 DEVMETHOD(agp_enable, agp_generic_enable),
397 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
398 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
399 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
400 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
401
402 { 0, 0 }
403};
404
405static driver_t agp_amd_driver = {
406 "agp",
407 agp_amd_methods,
408 sizeof(struct agp_amd_softc),
409};
410
411static devclass_t agp_devclass;
412
413DRIVER_MODULE(agp_amd, hostb, agp_amd_driver, agp_devclass, 0, 0);
414MODULE_DEPEND(agp_amd, agp, 1, 1, 1);
415MODULE_DEPEND(agp_amd, pci, 1, 1, 1);
| 208 desc = agp_amd_match(dev);
209 if (desc) {
210 device_set_desc(dev, desc);
211 return BUS_PROBE_DEFAULT;
212 }
213
214 return ENXIO;
215}
216
217static int
218agp_amd_attach(device_t dev)
219{
220 struct agp_amd_softc *sc = device_get_softc(dev);
221 struct agp_amd_gatt *gatt;
222 int error, rid;
223
224 error = agp_generic_attach(dev);
225 if (error)
226 return error;
227
228 rid = AGP_AMD751_REGISTERS;
229 sc->regs = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
230 RF_ACTIVE);
231 if (!sc->regs) {
232 agp_generic_detach(dev);
233 return ENOMEM;
234 }
235
236 sc->bst = rman_get_bustag(sc->regs);
237 sc->bsh = rman_get_bushandle(sc->regs);
238
239 sc->initial_aperture = AGP_GET_APERTURE(dev);
240
241 for (;;) {
242 gatt = agp_amd_alloc_gatt(dev);
243 if (gatt)
244 break;
245
246 /*
247 * Probably contigmalloc failure. Try reducing the
248 * aperture so that the gatt size reduces.
249 */
250 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2))
251 return ENOMEM;
252 }
253 sc->gatt = gatt;
254
255 /* Install the gatt. */
256 WRITE4(AGP_AMD751_ATTBASE, gatt->ag_pdir);
257
258 /* Enable synchronisation between host and agp. */
259 pci_write_config(dev,
260 AGP_AMD751_MODECTRL,
261 AGP_AMD751_MODECTRL_SYNEN, 1);
262
263 /* Set indexing mode for two-level and enable page dir cache */
264 pci_write_config(dev,
265 AGP_AMD751_MODECTRL2,
266 AGP_AMD751_MODECTRL2_GPDCE, 1);
267
268 /* Enable the TLB and flush */
269 WRITE2(AGP_AMD751_STATUS,
270 READ2(AGP_AMD751_STATUS) | AGP_AMD751_STATUS_GCE);
271 AGP_FLUSH_TLB(dev);
272
273 return 0;
274}
275
276static int
277agp_amd_detach(device_t dev)
278{
279 struct agp_amd_softc *sc = device_get_softc(dev);
280
281 agp_free_cdev(dev);
282
283 /* Disable the TLB.. */
284 WRITE2(AGP_AMD751_STATUS,
285 READ2(AGP_AMD751_STATUS) & ~AGP_AMD751_STATUS_GCE);
286
287 /* Disable host-agp sync */
288 pci_write_config(dev, AGP_AMD751_MODECTRL, 0x00, 1);
289
290 /* Clear the GATT base */
291 WRITE4(AGP_AMD751_ATTBASE, 0);
292
293 /* Put the aperture back the way it started. */
294 AGP_SET_APERTURE(dev, sc->initial_aperture);
295
296 agp_amd_free_gatt(sc->gatt);
297 agp_free_res(dev);
298
299 bus_release_resource(dev, SYS_RES_MEMORY,
300 AGP_AMD751_REGISTERS, sc->regs);
301
302 return 0;
303}
304
305static u_int32_t
306agp_amd_get_aperture(device_t dev)
307{
308 int vas;
309
310 /*
311 * The aperture size is equal to 32M<<vas.
312 */
313 vas = (pci_read_config(dev, AGP_AMD751_APCTRL, 1) & 0x06) >> 1;
314 return (32*1024*1024) << vas;
315}
316
317static int
318agp_amd_set_aperture(device_t dev, u_int32_t aperture)
319{
320 int vas;
321
322 /*
323 * Check for a power of two and make sure its within the
324 * programmable range.
325 */
326 if (aperture & (aperture - 1)
327 || aperture < 32*1024*1024
328 || aperture > 2U*1024*1024*1024)
329 return EINVAL;
330
331 vas = ffs(aperture / 32*1024*1024) - 1;
332
333 /*
334 * While the size register is bits 1-3 of APCTRL, bit 0 must be
335 * set for the size value to be 'valid'
336 */
337 pci_write_config(dev, AGP_AMD751_APCTRL,
338 (((pci_read_config(dev, AGP_AMD751_APCTRL, 1) & ~0x06)
339 | ((vas << 1) | 1))), 1);
340
341 return 0;
342}
343
344static int
345agp_amd_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
346{
347 struct agp_amd_softc *sc = device_get_softc(dev);
348
349 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
350 return EINVAL;
351
352 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 1;
353
354 /* invalidate the cache */
355 AGP_FLUSH_TLB(dev);
356 return 0;
357}
358
359static int
360agp_amd_unbind_page(device_t dev, vm_offset_t offset)
361{
362 struct agp_amd_softc *sc = device_get_softc(dev);
363
364 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
365 return EINVAL;
366
367 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
368 return 0;
369}
370
371static void
372agp_amd_flush_tlb(device_t dev)
373{
374 struct agp_amd_softc *sc = device_get_softc(dev);
375
376 /* Set the cache invalidate bit and wait for the chipset to clear */
377 WRITE4(AGP_AMD751_TLBCTRL, 1);
378 do {
379 DELAY(1);
380 } while (READ4(AGP_AMD751_TLBCTRL));
381}
382
383static device_method_t agp_amd_methods[] = {
384 /* Device interface */
385 DEVMETHOD(device_probe, agp_amd_probe),
386 DEVMETHOD(device_attach, agp_amd_attach),
387 DEVMETHOD(device_detach, agp_amd_detach),
388 DEVMETHOD(device_shutdown, bus_generic_shutdown),
389 DEVMETHOD(device_suspend, bus_generic_suspend),
390 DEVMETHOD(device_resume, bus_generic_resume),
391
392 /* AGP interface */
393 DEVMETHOD(agp_get_aperture, agp_amd_get_aperture),
394 DEVMETHOD(agp_set_aperture, agp_amd_set_aperture),
395 DEVMETHOD(agp_bind_page, agp_amd_bind_page),
396 DEVMETHOD(agp_unbind_page, agp_amd_unbind_page),
397 DEVMETHOD(agp_flush_tlb, agp_amd_flush_tlb),
398 DEVMETHOD(agp_enable, agp_generic_enable),
399 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
400 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
401 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
402 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
403
404 { 0, 0 }
405};
406
407static driver_t agp_amd_driver = {
408 "agp",
409 agp_amd_methods,
410 sizeof(struct agp_amd_softc),
411};
412
413static devclass_t agp_devclass;
414
415DRIVER_MODULE(agp_amd, hostb, agp_amd_driver, agp_devclass, 0, 0);
416MODULE_DEPEND(agp_amd, agp, 1, 1, 1);
417MODULE_DEPEND(agp_amd, pci, 1, 1, 1);
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