agp_amd64.c revision 141885 
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 141885 2005-02-14 07:30:04Z anholt $");
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 0x02041106:
86		return ("VIA 8380 host to PCI bridge");
87	case 0x02821106:
88		return ("VIA K8T800Pro host to PCI bridge");
89	case 0x31881106:
90		return ("VIA 8385 host to PCI bridge");
91	};
92
93	return NULL;
94}
95
96static int
97agp_amd64_probe(device_t dev)
98{
99	const char *desc;
100
101	if (resource_disabled("agp", device_get_unit(dev)))
102		return ENXIO;
103	if ((desc = agp_amd64_match(dev))) {
104		device_verbose(dev);
105		device_set_desc(dev, desc);
106		return 0;
107	}
108
109	return ENXIO;
110}
111
112static int
113agp_amd64_attach(device_t dev)
114{
115	struct agp_amd64_softc *sc = device_get_softc(dev);
116	struct agp_gatt *gatt;
117	int i, n, error;
118
119	for (i = 0, n = 0; i < PCI_SLOTMAX && n < AMD64_MAX_MCTRL; i++)
120		if (pci_cfgregread(0, i, 3, 0, 4) == 0x11031022) {
121			sc->mctrl[n] = i;
122			n++;
123		}
124
125	if (n == 0)
126		return ENXIO;
127
128	sc->n_mctrl = n;
129
130	if (bootverbose)
131		printf("AMD64: %d Misc. Control unit(s) found.\n", sc->n_mctrl);
132
133	if ((error = agp_generic_attach(dev)))
134		return error;
135
136	sc->initial_aperture = AGP_GET_APERTURE(dev);
137
138	for (;;) {
139		gatt = agp_alloc_gatt(dev);
140		if (gatt)
141			break;
142
143		/*
144		 * Probably contigmalloc failure. Try reducing the
145		 * aperture so that the gatt size reduces.
146		 */
147		if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
148			agp_generic_detach(dev);
149			return ENOMEM;
150		}
151	}
152	sc->gatt = gatt;
153
154	/* Install the gatt and enable aperture. */
155	for (i = 0; i < sc->n_mctrl; i++) {
156		pci_cfgregwrite(0, sc->mctrl[i], 3, AGP_AMD64_ATTBASE,
157		    (uint32_t)(gatt->ag_physical >> 8) & AGP_AMD64_ATTBASE_MASK,
158		    4);
159		pci_cfgregwrite(0, sc->mctrl[i], 3, AGP_AMD64_APCTRL,
160		    (pci_cfgregread(0, sc->mctrl[i], 3, AGP_AMD64_APCTRL, 4) |
161		    AGP_AMD64_APCTRL_GARTEN) &
162		    ~(AGP_AMD64_APCTRL_DISGARTCPU | AGP_AMD64_APCTRL_DISGARTIO),
163		    4);
164	}
165
166	agp_flush_cache();
167
168	return 0;
169}
170
171static int
172agp_amd64_detach(device_t dev)
173{
174	struct agp_amd64_softc *sc = device_get_softc(dev);
175	int i, error;
176
177	if ((error = agp_generic_detach(dev)))
178		return error;
179
180	for (i = 0; i < sc->n_mctrl; i++)
181		pci_cfgregwrite(0, sc->mctrl[i], 3, AGP_AMD64_APCTRL,
182		    pci_cfgregread(0, sc->mctrl[i], 3, AGP_AMD64_APCTRL, 4) &
183		    ~AGP_AMD64_APCTRL_GARTEN, 4);
184
185	AGP_SET_APERTURE(dev, sc->initial_aperture);
186	agp_free_gatt(sc->gatt);
187
188	return 0;
189}
190
191static uint32_t agp_amd64_table[] = {
192	0x02000000,	/*   32 MB */
193	0x04000000,	/*   64 MB */
194	0x08000000,	/*  128 MB */
195	0x10000000,	/*  256 MB */
196	0x20000000,	/*  512 MB */
197	0x40000000,	/* 1024 MB */
198	0x80000000,	/* 2048 MB */
199};
200
201#define AGP_AMD64_TABLE_SIZE \
202	(sizeof(agp_amd64_table) / sizeof(agp_amd64_table[0]))
203
204static uint32_t
205agp_amd64_get_aperture(device_t dev)
206{
207	struct agp_amd64_softc *sc = device_get_softc(dev);
208	uint32_t i;
209
210	i = (pci_cfgregread(0, sc->mctrl[0], 3, AGP_AMD64_APCTRL, 4) &
211		AGP_AMD64_APCTRL_SIZE_MASK) >> 1;
212
213	if (i >= AGP_AMD64_TABLE_SIZE)
214		return 0;
215
216	return (agp_amd64_table[i]);
217}
218
219static int
220agp_amd64_set_aperture(device_t dev, uint32_t aperture)
221{
222	struct agp_amd64_softc *sc = device_get_softc(dev);
223	uint32_t i;
224	int j;
225
226	for (i = 0; i < AGP_AMD64_TABLE_SIZE; i++)
227		if (agp_amd64_table[i] == aperture)
228			break;
229	if (i == AGP_AMD64_TABLE_SIZE)
230		return EINVAL;
231
232	for (j = 0; j < sc->n_mctrl; j++)
233		pci_cfgregwrite(0, sc->mctrl[j], 3, AGP_AMD64_APCTRL,
234		    (pci_cfgregread(0, sc->mctrl[j], 3, AGP_AMD64_APCTRL, 4) &
235		    ~(AGP_AMD64_APCTRL_SIZE_MASK)) | (i << 1), 4);
236
237	return 0;
238}
239
240static int
241agp_amd64_bind_page(device_t dev, int offset, vm_offset_t physical)
242{
243	struct agp_amd64_softc *sc = device_get_softc(dev);
244
245	if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
246		return EINVAL;
247
248	sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
249	return 0;
250}
251
252static int
253agp_amd64_unbind_page(device_t dev, int offset)
254{
255	struct agp_amd64_softc *sc = device_get_softc(dev);
256
257	if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
258		return EINVAL;
259
260	sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
261	return 0;
262}
263
264static void
265agp_amd64_flush_tlb(device_t dev)
266{
267	struct agp_amd64_softc *sc = device_get_softc(dev);
268	int i;
269
270	for (i = 0; i < sc->n_mctrl; i++)
271		pci_cfgregwrite(0, sc->mctrl[i], 3, AGP_AMD64_CACHECTRL,
272		    pci_cfgregread(0, sc->mctrl[i], 3, AGP_AMD64_CACHECTRL, 4) |
273		    AGP_AMD64_CACHECTRL_INVGART, 4);
274}
275
276static device_method_t agp_amd64_methods[] = {
277	/* Device interface */
278	DEVMETHOD(device_probe,		agp_amd64_probe),
279	DEVMETHOD(device_attach,	agp_amd64_attach),
280	DEVMETHOD(device_detach,	agp_amd64_detach),
281	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
282	DEVMETHOD(device_suspend,	bus_generic_suspend),
283	DEVMETHOD(device_resume,	bus_generic_resume),
284
285	/* AGP interface */
286	DEVMETHOD(agp_get_aperture,	agp_amd64_get_aperture),
287	DEVMETHOD(agp_set_aperture,	agp_amd64_set_aperture),
288	DEVMETHOD(agp_bind_page,	agp_amd64_bind_page),
289	DEVMETHOD(agp_unbind_page,	agp_amd64_unbind_page),
290	DEVMETHOD(agp_flush_tlb,	agp_amd64_flush_tlb),
291	DEVMETHOD(agp_enable,		agp_generic_enable),
292	DEVMETHOD(agp_alloc_memory,	agp_generic_alloc_memory),
293	DEVMETHOD(agp_free_memory,	agp_generic_free_memory),
294	DEVMETHOD(agp_bind_memory,	agp_generic_bind_memory),
295	DEVMETHOD(agp_unbind_memory,	agp_generic_unbind_memory),
296
297	{ 0, 0 }
298};
299
300static driver_t agp_amd64_driver = {
301	"agp",
302	agp_amd64_methods,
303	sizeof(struct agp_amd64_softc),
304};
305
306static devclass_t agp_devclass;
307
308DRIVER_MODULE(agp_amd64, pci, agp_amd64_driver, agp_devclass, 0, 0);
309MODULE_DEPEND(agp_amd64, agp, 1, 1, 1);
310MODULE_DEPEND(agp_amd64, pci, 1, 1, 1);
311