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>
28__FBSDID("$FreeBSD: head/sys/dev/agp/agp_ali.c 127815 2004-04-03 22:55:12Z njl $");
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/bus.h>
37#include <sys/lock.h>
38#include <sys/lockmgr.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
51struct agp_ali_softc {
52 struct agp_softc agp;
53 u_int32_t initial_aperture; /* aperture size at startup */
54 struct agp_gatt *gatt;
55};
56
57static const char*
58agp_ali_match(device_t dev)
59{
60 if (pci_get_class(dev) != PCIC_BRIDGE
61 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
62 return NULL;
63
64 if (agp_find_caps(dev) == 0)
65 return NULL;
66
67 switch (pci_get_devid(dev)) {
68 case 0x154110b9:
69 return ("Ali M1541 host to AGP bridge");
70 };
71
72 if (pci_get_vendor(dev) == 0x10b9)
73 return ("Ali Generic host to PCI bridge");
74
75 return NULL;
76}
77
78static int
79agp_ali_probe(device_t dev)
80{
81 const char *desc;
82
83 if (resource_disabled("agp", device_get_unit(dev)))
84 return (ENXIO);
85 desc = agp_ali_match(dev);
86 if (desc) {
87 device_verbose(dev);
88 device_set_desc(dev, desc);
89 return 0;
90 }
91
92 return ENXIO;
93}
94
95static int
96agp_ali_attach(device_t dev)
97{
98 struct agp_ali_softc *sc = device_get_softc(dev);
99 struct agp_gatt *gatt;
100 int error;
101
102 error = agp_generic_attach(dev);
103 if (error)
104 return error;
105
106 sc->initial_aperture = AGP_GET_APERTURE(dev);
107 if (sc->initial_aperture == 0) {
108 device_printf(dev, "bad initial aperture size, disabling\n");
109 return ENXIO;
110 }
111
112 for (;;) {
113 gatt = agp_alloc_gatt(dev);
114 if (gatt)
115 break;
116
117 /*
118 * Probably contigmalloc failure. Try reducing the
119 * aperture so that the gatt size reduces.
120 */
121 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
122 agp_generic_detach(dev);
123 return ENOMEM;
124 }
125 }
126 sc->gatt = gatt;
127
128 /* Install the gatt. */
129 pci_write_config(dev, AGP_ALI_ATTBASE,
130 (gatt->ag_physical
131 | (pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff)),
132 4);
133
134 /* Enable the TLB. */
135 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
136
137 return 0;
138}
139
140static int
141agp_ali_detach(device_t dev)
142{
143 struct agp_ali_softc *sc = device_get_softc(dev);
144 int error;
145
146 error = agp_generic_detach(dev);
147 if (error)
148 return error;
149
150 /* Disable the TLB.. */
151 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
152
153 /* Put the aperture back the way it started. */
154 AGP_SET_APERTURE(dev, sc->initial_aperture);
155 pci_write_config(dev, AGP_ALI_ATTBASE,
156 pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff,
157 4);
158
159 agp_free_gatt(sc->gatt);
160 return 0;
161}
162
163#define M 1024*1024
164
165static u_int32_t agp_ali_table[] = {
166 0, /* 0 - invalid */
167 1, /* 1 - invalid */
168 2, /* 2 - invalid */
169 4*M, /* 3 - invalid */
170 8*M, /* 4 - invalid */
171 0, /* 5 - invalid */
172 16*M, /* 6 - invalid */
173 32*M, /* 7 - invalid */
174 64*M, /* 8 - invalid */
175 128*M, /* 9 - invalid */
176 256*M, /* 10 - invalid */
177};
178#define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0]))
179
180static u_int32_t
181agp_ali_get_aperture(device_t dev)
182{
183 /*
184 * The aperture size is derived from the low bits of attbase.
185 * I'm not sure this is correct..
186 */
187 int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff;
188 if (i >= agp_ali_table_size)
189 return 0;
190 return agp_ali_table[i];
191}
192
193static int
194agp_ali_set_aperture(device_t dev, u_int32_t aperture)
195{
196 int i;
197
198 for (i = 0; i < agp_ali_table_size; i++)
199 if (agp_ali_table[i] == aperture)
200 break;
201 if (i == agp_ali_table_size)
202 return EINVAL;
203
204 pci_write_config(dev, AGP_ALI_ATTBASE,
205 ((pci_read_config(dev, AGP_ALI_ATTBASE, 4) & ~0xff)
206 | i), 4);
207 return 0;
208}
209
210static int
211agp_ali_bind_page(device_t dev, int offset, vm_offset_t physical)
212{
213 struct agp_ali_softc *sc = device_get_softc(dev);
214
215 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
216 return EINVAL;
217
218 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
219 return 0;
220}
221
222static int
223agp_ali_unbind_page(device_t dev, int offset)
224{
225 struct agp_ali_softc *sc = device_get_softc(dev);
226
227 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
228 return EINVAL;
229
230 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
231 return 0;
232}
233
234static void
235agp_ali_flush_tlb(device_t dev)
236{
237 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
238 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
239}
240
241static device_method_t agp_ali_methods[] = {
242 /* Device interface */
243 DEVMETHOD(device_probe, agp_ali_probe),
244 DEVMETHOD(device_attach, agp_ali_attach),
245 DEVMETHOD(device_detach, agp_ali_detach),
246 DEVMETHOD(device_shutdown, bus_generic_shutdown),
247 DEVMETHOD(device_suspend, bus_generic_suspend),
248 DEVMETHOD(device_resume, bus_generic_resume),
249
250 /* AGP interface */
251 DEVMETHOD(agp_get_aperture, agp_ali_get_aperture),
252 DEVMETHOD(agp_set_aperture, agp_ali_set_aperture),
253 DEVMETHOD(agp_bind_page, agp_ali_bind_page),
254 DEVMETHOD(agp_unbind_page, agp_ali_unbind_page),
255 DEVMETHOD(agp_flush_tlb, agp_ali_flush_tlb),
256 DEVMETHOD(agp_enable, agp_generic_enable),
257 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
258 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
259 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
260 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
261
262 { 0, 0 }
263};
264
265static driver_t agp_ali_driver = {
266 "agp",
267 agp_ali_methods,
268 sizeof(struct agp_ali_softc),
269};
270
271static devclass_t agp_devclass;
272
273DRIVER_MODULE(agp_ali, pci, agp_ali_driver, agp_devclass, 0, 0);
274MODULE_DEPEND(agp_ali, agp, 1, 1, 1);
275MODULE_DEPEND(agp_ali, pci, 1, 1, 1);