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>
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38#include <sys/mutex.h>
39#include <sys/proc.h>
40
41#include <dev/pci/pcivar.h>
42#include <dev/pci/pcireg.h>
43#include <pci/agppriv.h>
44#include <pci/agpreg.h>
45
46#include <vm/vm.h>
47#include <vm/vm_object.h>
48#include <vm/pmap.h>
49
50struct agp_ali_softc {
51 struct agp_softc agp;
52 u_int32_t initial_aperture; /* aperture size at startup */
53 struct agp_gatt *gatt;
54};
55
56static const char*
57agp_ali_match(device_t dev)
58{
59 if (pci_get_class(dev) != PCIC_BRIDGE
60 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
61 return NULL;
62
63 if (agp_find_caps(dev) == 0)
64 return NULL;
65
66 switch (pci_get_devid(dev)) {
67 case 0x154110b9:
68 return ("Ali M1541 host to AGP bridge");
69 };
70
71 if (pci_get_vendor(dev) == 0x10b9)
72 return ("Ali Generic host to PCI bridge");
73
74 return NULL;
75}
76
77static int
78agp_ali_probe(device_t dev)
79{
80 const char *desc;
81
82 if (resource_disabled("agp", device_get_unit(dev)))
83 return (ENXIO);
84 desc = agp_ali_match(dev);
85 if (desc) {
86 device_verbose(dev);
87 device_set_desc(dev, desc);
88 return 0;
89 }
90
91 return ENXIO;
92}
93
94static int
95agp_ali_attach(device_t dev)
96{
97 struct agp_ali_softc *sc = device_get_softc(dev);
98 struct agp_gatt *gatt;
99 int error;
100
101 error = agp_generic_attach(dev);
102 if (error)
103 return error;
104
105 sc->initial_aperture = AGP_GET_APERTURE(dev);
106 if (sc->initial_aperture == 0) {
107 device_printf(dev, "bad initial aperture size, disabling\n");
108 return ENXIO;
109 }
110
111 for (;;) {
112 gatt = agp_alloc_gatt(dev);
113 if (gatt)
114 break;
115
116 /*
117 * Probably contigmalloc failure. Try reducing the
118 * aperture so that the gatt size reduces.
119 */
120 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
121 agp_generic_detach(dev);
122 return ENOMEM;
123 }
124 }
125 sc->gatt = gatt;
126
127 /* Install the gatt. */
128 pci_write_config(dev, AGP_ALI_ATTBASE,
129 (gatt->ag_physical
130 | (pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff)),
131 4);
132
133 /* Enable the TLB. */
134 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
135
136 return 0;
137}
138
139static int
140agp_ali_detach(device_t dev)
141{
142 struct agp_ali_softc *sc = device_get_softc(dev);
143 int error;
144
145 error = agp_generic_detach(dev);
146 if (error)
147 return error;
148
149 /* Disable the TLB.. */
150 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
151
152 /* Put the aperture back the way it started. */
153 AGP_SET_APERTURE(dev, sc->initial_aperture);
154 pci_write_config(dev, AGP_ALI_ATTBASE,
155 pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff,
156 4);
157
158 agp_free_gatt(sc->gatt);
159 return 0;
160}
161
162#define M 1024*1024
163
164static u_int32_t agp_ali_table[] = {
165 0, /* 0 - invalid */
166 1, /* 1 - invalid */
167 2, /* 2 - invalid */
168 4*M, /* 3 - invalid */
169 8*M, /* 4 - invalid */
170 0, /* 5 - invalid */
171 16*M, /* 6 - invalid */
172 32*M, /* 7 - invalid */
173 64*M, /* 8 - invalid */
174 128*M, /* 9 - invalid */
175 256*M, /* 10 - invalid */
176};
177#define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0]))
178
179static u_int32_t
180agp_ali_get_aperture(device_t dev)
181{
182 /*
183 * The aperture size is derived from the low bits of attbase.
184 * I'm not sure this is correct..
185 */
186 int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff;
187 if (i >= agp_ali_table_size)
188 return 0;
189 return agp_ali_table[i];
190}
191
192static int
193agp_ali_set_aperture(device_t dev, u_int32_t aperture)
194{
195 int i;
196
197 for (i = 0; i < agp_ali_table_size; i++)
198 if (agp_ali_table[i] == aperture)
199 break;
200 if (i == agp_ali_table_size)
201 return EINVAL;
202
203 pci_write_config(dev, AGP_ALI_ATTBASE,
204 ((pci_read_config(dev, AGP_ALI_ATTBASE, 4) & ~0xff)
205 | i), 4);
206 return 0;
207}
208
209static int
210agp_ali_bind_page(device_t dev, int offset, vm_offset_t physical)
211{
212 struct agp_ali_softc *sc = device_get_softc(dev);
213
214 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
215 return EINVAL;
216
217 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
218 return 0;
219}
220
221static int
222agp_ali_unbind_page(device_t dev, int offset)
223{
224 struct agp_ali_softc *sc = device_get_softc(dev);
225
226 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
227 return EINVAL;
228
229 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
230 return 0;
231}
232
233static void
234agp_ali_flush_tlb(device_t dev)
235{
236 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
237 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
238}
239
240static device_method_t agp_ali_methods[] = {
241 /* Device interface */
242 DEVMETHOD(device_probe, agp_ali_probe),
243 DEVMETHOD(device_attach, agp_ali_attach),
244 DEVMETHOD(device_detach, agp_ali_detach),
245 DEVMETHOD(device_shutdown, bus_generic_shutdown),
246 DEVMETHOD(device_suspend, bus_generic_suspend),
247 DEVMETHOD(device_resume, bus_generic_resume),
248
249 /* AGP interface */
250 DEVMETHOD(agp_get_aperture, agp_ali_get_aperture),
251 DEVMETHOD(agp_set_aperture, agp_ali_set_aperture),
252 DEVMETHOD(agp_bind_page, agp_ali_bind_page),
253 DEVMETHOD(agp_unbind_page, agp_ali_unbind_page),
254 DEVMETHOD(agp_flush_tlb, agp_ali_flush_tlb),
255 DEVMETHOD(agp_enable, agp_generic_enable),
256 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
257 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
258 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
259 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
260
261 { 0, 0 }
262};
263
264static driver_t agp_ali_driver = {
265 "agp",
266 agp_ali_methods,
267 sizeof(struct agp_ali_softc),
268};
269
270static devclass_t agp_devclass;
271
272DRIVER_MODULE(agp_ali, pci, agp_ali_driver, agp_devclass, 0, 0);
273MODULE_DEPEND(agp_ali, agp, 1, 1, 1);
274MODULE_DEPEND(agp_ali, pci, 1, 1, 1);
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