1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2000 Doug Rabson
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/malloc.h>
32 #include <sys/kernel.h>
33 #include <sys/module.h>
34 #include <sys/bus.h>
35 #include <sys/lock.h>
36 #include <sys/mutex.h>
37 #include <sys/proc.h>
38
39 #include <dev/agp/agppriv.h>
40 #include <dev/agp/agpreg.h>
41 #include <dev/pci/pcivar.h>
42 #include <dev/pci/pcireg.h>
43
44 #include <vm/vm.h>
45 #include <vm/vm_object.h>
46 #include <vm/pmap.h>
47
48 struct agp_ali_softc {
49 struct agp_softc agp;
50 u_int32_t initial_aperture; /* aperture size at startup */
51 struct agp_gatt *gatt;
52 };
53
54 static const char*
agp_ali_match(device_t dev)55 agp_ali_match(device_t dev)
56 {
57 if (pci_get_class(dev) != PCIC_BRIDGE
58 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
59 return NULL;
60
61 if (agp_find_caps(dev) == 0)
62 return NULL;
63
64 switch (pci_get_devid(dev)) {
65 case 0x167110b9:
66 return ("Ali M1671 host to AGP bridge");
67 case 0x154110b9:
68 return ("Ali M1541 host to AGP bridge");
69 case 0x162110b9:
70 return ("Ali M1621 host to AGP bridge");
71 }
72
73 return NULL;
74 }
75
76 static int
agp_ali_probe(device_t dev)77 agp_ali_probe(device_t dev)
78 {
79 const char *desc;
80
81 if (resource_disabled("agp", device_get_unit(dev)))
82 return (ENXIO);
83 desc = agp_ali_match(dev);
84 if (desc) {
85 device_set_desc(dev, desc);
86 return BUS_PROBE_DEFAULT;
87 }
88
89 return ENXIO;
90 }
91
92 static int
agp_ali_attach(device_t dev)93 agp_ali_attach(device_t dev)
94 {
95 struct agp_ali_softc *sc = device_get_softc(dev);
96 struct agp_gatt *gatt;
97 int error;
98 u_int32_t attbase;
99
100 error = agp_generic_attach(dev);
101 if (error)
102 return error;
103
104 sc->initial_aperture = AGP_GET_APERTURE(dev);
105 if (sc->initial_aperture == 0) {
106 device_printf(dev, "bad initial aperture size, disabling\n");
107 return ENXIO;
108 }
109
110 for (;;) {
111 gatt = agp_alloc_gatt(dev);
112 if (gatt)
113 break;
114
115 /*
116 * Probably contigmalloc failure. Try reducing the
117 * aperture so that the gatt size reduces.
118 */
119 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
120 agp_generic_detach(dev);
121 return ENOMEM;
122 }
123 }
124 sc->gatt = gatt;
125
126 /* Install the gatt. */
127 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
128 pci_write_config(dev, AGP_ALI_ATTBASE, gatt->ag_physical |
129 (attbase & 0xfff), 4);
130
131 /* Enable the TLB. */
132 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
133
134 return 0;
135 }
136
137 static int
agp_ali_detach(device_t dev)138 agp_ali_detach(device_t dev)
139 {
140 struct agp_ali_softc *sc = device_get_softc(dev);
141 u_int32_t attbase;
142
143 agp_free_cdev(dev);
144
145 /* Disable the TLB.. */
146 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
147
148 /* Put the aperture back the way it started. */
149 AGP_SET_APERTURE(dev, sc->initial_aperture);
150 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
151 pci_write_config(dev, AGP_ALI_ATTBASE, attbase & 0xfff, 4);
152
153 agp_free_gatt(sc->gatt);
154 agp_free_res(dev);
155 return 0;
156 }
157
158 #define M 1024*1024
159
160 static u_int32_t agp_ali_table[] = {
161 0, /* 0 - invalid */
162 1, /* 1 - invalid */
163 2, /* 2 - invalid */
164 4*M, /* 3 - invalid */
165 8*M, /* 4 - invalid */
166 0, /* 5 - invalid */
167 16*M, /* 6 - invalid */
168 32*M, /* 7 - invalid */
169 64*M, /* 8 - invalid */
170 128*M, /* 9 - invalid */
171 256*M, /* 10 - invalid */
172 };
173 #define AGP_ALI_TABLE_SIZE nitems(agp_ali_table)
174
175 static u_int32_t
agp_ali_get_aperture(device_t dev)176 agp_ali_get_aperture(device_t dev)
177 {
178 /*
179 * The aperture size is derived from the low bits of attbase.
180 * I'm not sure this is correct..
181 */
182 int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xf;
183 if (i >= AGP_ALI_TABLE_SIZE)
184 return 0;
185 return agp_ali_table[i];
186 }
187
188 static int
agp_ali_set_aperture(device_t dev,u_int32_t aperture)189 agp_ali_set_aperture(device_t dev, u_int32_t aperture)
190 {
191 int i;
192 u_int32_t attbase;
193
194 for (i = 0; i < AGP_ALI_TABLE_SIZE; i++)
195 if (agp_ali_table[i] == aperture)
196 break;
197 if (i == AGP_ALI_TABLE_SIZE)
198 return EINVAL;
199
200 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
201 pci_write_config(dev, AGP_ALI_ATTBASE, (attbase & ~0xf) | i, 4);
202 return 0;
203 }
204
205 static int
agp_ali_bind_page(device_t dev,vm_offset_t offset,vm_offset_t physical)206 agp_ali_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
207 {
208 struct agp_ali_softc *sc = device_get_softc(dev);
209
210 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
211 return EINVAL;
212
213 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
214 return 0;
215 }
216
217 static int
agp_ali_unbind_page(device_t dev,vm_offset_t offset)218 agp_ali_unbind_page(device_t dev, vm_offset_t offset)
219 {
220 struct agp_ali_softc *sc = device_get_softc(dev);
221
222 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
223 return EINVAL;
224
225 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
226 return 0;
227 }
228
229 static void
agp_ali_flush_tlb(device_t dev)230 agp_ali_flush_tlb(device_t dev)
231 {
232 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
233 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
234 }
235
236 static device_method_t agp_ali_methods[] = {
237 /* Device interface */
238 DEVMETHOD(device_probe, agp_ali_probe),
239 DEVMETHOD(device_attach, agp_ali_attach),
240 DEVMETHOD(device_detach, agp_ali_detach),
241 DEVMETHOD(device_shutdown, bus_generic_shutdown),
242 DEVMETHOD(device_suspend, bus_generic_suspend),
243 DEVMETHOD(device_resume, bus_generic_resume),
244
245 /* AGP interface */
246 DEVMETHOD(agp_get_aperture, agp_ali_get_aperture),
247 DEVMETHOD(agp_set_aperture, agp_ali_set_aperture),
248 DEVMETHOD(agp_bind_page, agp_ali_bind_page),
249 DEVMETHOD(agp_unbind_page, agp_ali_unbind_page),
250 DEVMETHOD(agp_flush_tlb, agp_ali_flush_tlb),
251 DEVMETHOD(agp_enable, agp_generic_enable),
252 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
253 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
254 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
255 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
256 { 0, 0 }
257 };
258
259 static driver_t agp_ali_driver = {
260 "agp",
261 agp_ali_methods,
262 sizeof(struct agp_ali_softc),
263 };
264
265 DRIVER_MODULE(agp_ali, hostb, agp_ali_driver, 0, 0);
266 MODULE_DEPEND(agp_ali, agp, 1, 1, 1);
267 MODULE_DEPEND(agp_ali, pci, 1, 1, 1);
268