agp_amd64.c revision 144809 
1/*-
2 * Copyright (c) 2004 Jung-uk Kim
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>
28__FBSDID("$FreeBSD: head/sys/dev/agp/agp_amd64.c 144809 2005-04-08 18:04:39Z obrien $");
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/pci/pcivar.h>
43#include <dev/pci/pcireg.h>
44#include <pci/agppriv.h>
45#include <pci/agpreg.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
54/* XXX */
55extern void pci_cfgregwrite(int, int, int, int, uint32_t, int);
56extern uint32_t pci_cfgregread(int, int, int, int, int);
57
58MALLOC_DECLARE(M_AGP);
59
60#define	AMD64_MAX_MCTRL		8
61
62struct agp_amd64_softc {
63	struct agp_softc	agp;
64	uint32_t	initial_aperture; /* aperture size at startup */
65	struct agp_gatt	*gatt;
66	int		mctrl[AMD64_MAX_MCTRL];
67	int		n_mctrl;
68};
69
70static const char*
71agp_amd64_match(device_t dev)
72{
73	if (pci_get_class(dev) != PCIC_BRIDGE
74	    || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
75		return NULL;
76
77	if (agp_find_caps(dev) == 0)
78		return NULL;
79
80	switch (pci_get_devid(dev)) {
81	case 0x74541022:
82		return ("AMD 8151 AGP graphics tunnel");
83	case 0x07551039:
84		return ("SiS 755 host to AGP bridge");
85	case 0x00d110de:
86		return ("NVIDIA nForce3 AGP Controller");
87	case 0x00e110de:
88		return ("NVIDIA nForce3-250 AGP Controller");
89	case 0x02041106:
90		return ("VIA 8380 host to PCI bridge");
91	case 0x02821106:
92		return ("VIA K8T800Pro host to PCI bridge");
93	case 0x31881106:
94		return ("VIA 8385 host to PCI bridge");
95	};
96
97	return NULL;
98}
99
100static int
101agp_amd64_probe(device_t dev)
102{
103	const char *desc;
104
105	if (resource_disabled("agp", device_get_unit(dev)))
106		return ENXIO;
107	if ((desc = agp_amd64_match(dev))) {
108		device_verbose(dev);
109		device_set_desc(dev, desc);
110		return BUS_PROBE_DEFAULT;
111	}
112
113	return ENXIO;
114}
115
116static int
117agp_amd64_attach(device_t dev)
118{
119	struct agp_amd64_softc *sc = device_get_softc(dev);
120	struct agp_gatt *gatt;
121	int i, n, error;
122
123	for (i = 0, n = 0; i < PCI_SLOTMAX && n < AMD64_MAX_MCTRL; i++)
124		if (pci_cfgregread(0, i, 3, 0, 4) == 0x11031022) {
125			sc->mctrl[n] = i;
126			n++;
127		}
128
129	if (n == 0)
130		return ENXIO;
131
132	sc->n_mctrl = n;
133
134	if (bootverbose)
135		printf("AMD64: %d Misc. Control unit(s) found.\n", sc->n_mctrl);
136
137	if ((error = agp_generic_attach(dev)))
138		return error;
139
140	sc->initial_aperture = AGP_GET_APERTURE(dev);
141
142	for (;;) {
143		gatt = agp_alloc_gatt(dev);
144		if (gatt)
145			break;
146
147		/*
148		 * Probably contigmalloc failure. Try reducing the
149		 * aperture so that the gatt size reduces.
150		 */
151		if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
152			agp_generic_detach(dev);
153			return ENOMEM;
154		}
155	}
156	sc->gatt = gatt;
157
158	/* Install the gatt and enable aperture. */
159	for (i = 0; i < sc->n_mctrl; i++) {
160		pci_cfgregwrite(0, sc->mctrl[i], 3, AGP_AMD64_ATTBASE,
161		    (uint32_t)(gatt->ag_physical >> 8) & AGP_AMD64_ATTBASE_MASK,
162		    4);
163		pci_cfgregwrite(0, sc->mctrl[i], 3, AGP_AMD64_APCTRL,
164		    (pci_cfgregread(0, sc->mctrl[i], 3, AGP_AMD64_APCTRL, 4) |
165		    AGP_AMD64_APCTRL_GARTEN) &
166		    ~(AGP_AMD64_APCTRL_DISGARTCPU | AGP_AMD64_APCTRL_DISGARTIO),
167		    4);
168	}
169
170	agp_flush_cache();
171
172	return 0;
173}
174
175static int
176agp_amd64_detach(device_t dev)
177{
178	struct agp_amd64_softc *sc = device_get_softc(dev);
179	int i, error;
180
181	if ((error = agp_generic_detach(dev)))
182		return error;
183
184	for (i = 0; i < sc->n_mctrl; i++)
185		pci_cfgregwrite(0, sc->mctrl[i], 3, AGP_AMD64_APCTRL,
186		    pci_cfgregread(0, sc->mctrl[i], 3, AGP_AMD64_APCTRL, 4) &
187		    ~AGP_AMD64_APCTRL_GARTEN, 4);
188
189	AGP_SET_APERTURE(dev, sc->initial_aperture);
190	agp_free_gatt(sc->gatt);
191
192	return 0;
193}
194
195static uint32_t agp_amd64_table[] = {
196	0x02000000,	/*   32 MB */
197	0x04000000,	/*   64 MB */
198	0x08000000,	/*  128 MB */
199	0x10000000,	/*  256 MB */
200	0x20000000,	/*  512 MB */
201	0x40000000,	/* 1024 MB */
202	0x80000000,	/* 2048 MB */
203};
204
205#define AGP_AMD64_TABLE_SIZE \
206	(sizeof(agp_amd64_table) / sizeof(agp_amd64_table[0]))
207
208static uint32_t
209agp_amd64_get_aperture(device_t dev)
210{
211	struct agp_amd64_softc *sc = device_get_softc(dev);
212	uint32_t i;
213
214	i = (pci_cfgregread(0, sc->mctrl[0], 3, AGP_AMD64_APCTRL, 4) &
215		AGP_AMD64_APCTRL_SIZE_MASK) >> 1;
216
217	if (i >= AGP_AMD64_TABLE_SIZE)
218		return 0;
219
220	return (agp_amd64_table[i]);
221}
222
223static int
224agp_amd64_set_aperture(device_t dev, uint32_t aperture)
225{
226	struct agp_amd64_softc *sc = device_get_softc(dev);
227	uint32_t i;
228	int j;
229
230	for (i = 0; i < AGP_AMD64_TABLE_SIZE; i++)
231		if (agp_amd64_table[i] == aperture)
232			break;
233	if (i == AGP_AMD64_TABLE_SIZE)
234		return EINVAL;
235
236	for (j = 0; j < sc->n_mctrl; j++)
237		pci_cfgregwrite(0, sc->mctrl[j], 3, AGP_AMD64_APCTRL,
238		    (pci_cfgregread(0, sc->mctrl[j], 3, AGP_AMD64_APCTRL, 4) &
239		    ~(AGP_AMD64_APCTRL_SIZE_MASK)) | (i << 1), 4);
240
241	return 0;
242}
243
244static int
245agp_amd64_bind_page(device_t dev, int offset, vm_offset_t physical)
246{
247	struct agp_amd64_softc *sc = device_get_softc(dev);
248
249	if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
250		return EINVAL;
251
252	sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
253	return 0;
254}
255
256static int
257agp_amd64_unbind_page(device_t dev, int offset)
258{
259	struct agp_amd64_softc *sc = device_get_softc(dev);
260
261	if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
262		return EINVAL;
263
264	sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
265	return 0;
266}
267
268static void
269agp_amd64_flush_tlb(device_t dev)
270{
271	struct agp_amd64_softc *sc = device_get_softc(dev);
272	int i;
273
274	for (i = 0; i < sc->n_mctrl; i++)
275		pci_cfgregwrite(0, sc->mctrl[i], 3, AGP_AMD64_CACHECTRL,
276		    pci_cfgregread(0, sc->mctrl[i], 3, AGP_AMD64_CACHECTRL, 4) |
277		    AGP_AMD64_CACHECTRL_INVGART, 4);
278}
279
280static device_method_t agp_amd64_methods[] = {
281	/* Device interface */
282	DEVMETHOD(device_probe,		agp_amd64_probe),
283	DEVMETHOD(device_attach,	agp_amd64_attach),
284	DEVMETHOD(device_detach,	agp_amd64_detach),
285	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
286	DEVMETHOD(device_suspend,	bus_generic_suspend),
287	DEVMETHOD(device_resume,	bus_generic_resume),
288
289	/* AGP interface */
290	DEVMETHOD(agp_get_aperture,	agp_amd64_get_aperture),
291	DEVMETHOD(agp_set_aperture,	agp_amd64_set_aperture),
292	DEVMETHOD(agp_bind_page,	agp_amd64_bind_page),
293	DEVMETHOD(agp_unbind_page,	agp_amd64_unbind_page),
294	DEVMETHOD(agp_flush_tlb,	agp_amd64_flush_tlb),
295	DEVMETHOD(agp_enable,		agp_generic_enable),
296	DEVMETHOD(agp_alloc_memory,	agp_generic_alloc_memory),
297	DEVMETHOD(agp_free_memory,	agp_generic_free_memory),
298	DEVMETHOD(agp_bind_memory,	agp_generic_bind_memory),
299	DEVMETHOD(agp_unbind_memory,	agp_generic_unbind_memory),
300
301	{ 0, 0 }
302};
303
304static driver_t agp_amd64_driver = {
305	"agp",
306	agp_amd64_methods,
307	sizeof(struct agp_amd64_softc),
308};
309
310static devclass_t agp_devclass;
311
312DRIVER_MODULE(agp_amd64, pci, agp_amd64_driver, agp_devclass, 0, 0);
313MODULE_DEPEND(agp_amd64, agp, 1, 1, 1);
314MODULE_DEPEND(agp_amd64, pci, 1, 1, 1);
315