1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2010 Nathan Whitehorn
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/cdefs.h>
30 __FBSDID("$FreeBSD: releng/12.0/sys/dev/agp/agp_apple.c 326255 2017-11-27 14:52:40Z pfg $");
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 <machine/resource.h>
43
44 #include <dev/agp/agppriv.h>
45 #include <dev/agp/agpreg.h>
46 #include <dev/pci/pcivar.h>
47 #include <dev/pci/pcireg.h>
48
49 #include <vm/vm.h>
50 #include <vm/vm_object.h>
51 #include <vm/pmap.h>
52
53 #define UNIN_AGP_GART_BASE 0x8c
54 #define UNIN_AGP_BASE_ADDR 0x90
55 #define UNIN_AGP_GART_CONTROL 0x94
56
57 #define UNIN_AGP_GART_INVAL 0x00000001
58 #define UNIN_AGP_GART_ENABLE 0x00000100
59 #define UNIN_AGP_GART_2XRESET 0x00010000
60 #define UNIN_AGP_U3_GART_PERFRD 0x00080000
61
62 struct agp_apple_softc {
63 struct agp_softc agp;
64 uint32_t aperture;
65 struct agp_gatt *gatt;
66 int u3;
67 int needs_2x_reset;
68 };
69
70 static int
71 agp_apple_probe(device_t dev)
72 {
73
74 if (resource_disabled("agp", device_get_unit(dev)))
75 return (ENXIO);
76
77 if (pci_get_class(dev) != PCIC_BRIDGE
78 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
79 return (ENXIO);
80
81 if (agp_find_caps(dev) == 0)
82 return (ENXIO);
83
84 if (pci_get_class(dev) != PCIC_BRIDGE
85 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
86 return (ENXIO);
87
88 switch (pci_get_devid(dev)) {
89 case 0x0020106b:
90 case 0x0027106b:
91 device_set_desc(dev, "Apple UniNorth AGP Bridge");
92 return (BUS_PROBE_DEFAULT);
93 case 0x002d106b:
94 device_set_desc(dev, "Apple UniNorth 1.5 AGP Bridge");
95 return (BUS_PROBE_DEFAULT);
96 case 0x0034106b:
97 device_set_desc(dev, "Apple UniNorth 2 AGP Bridge");
98 return (BUS_PROBE_DEFAULT);
99 case 0x004b106b:
100 case 0x0058106b:
101 case 0x0059106b:
102 device_set_desc(dev, "Apple U3 AGP Bridge");
103 return (BUS_PROBE_DEFAULT);
104 case 0x0066106b:
105 device_set_desc(dev, "Apple Intrepid AGP Bridge");
106 return (BUS_PROBE_DEFAULT);
107 }
108
109 return (ENXIO);
110 }
111
112 static int
113 agp_apple_attach(device_t dev)
114 {
115 struct agp_apple_softc *sc = device_get_softc(dev);
116 int error;
117
118 /* Record quirks */
119 sc->needs_2x_reset = 0;
120 sc->u3 = 0;
121 switch (pci_get_devid(dev)) {
122 case 0x0020106b:
123 case 0x0027106b:
124 sc->needs_2x_reset = 1;
125 break;
126 case 0x004b106b:
127 case 0x0058106b:
128 case 0x0059106b:
129 sc->u3 = 1;
130 break;
131 }
132
133 /* Set the aperture bus address base (must be 0) */
134 pci_write_config(dev, UNIN_AGP_BASE_ADDR, 0, 4);
135 agp_set_aperture_resource(dev, -1);
136
137 error = agp_generic_attach(dev);
138 if (error)
139 return (error);
140
141 sc->aperture = 256*1024*1024;
142
143 for (sc->aperture = 256*1024*1024; sc->aperture >= 4*1024*1024;
144 sc->aperture /= 2) {
145 sc->gatt = agp_alloc_gatt(dev);
146 if (sc->gatt)
147 break;
148 }
149 if (sc->aperture < 4*1024*1024) {
150 agp_generic_detach(dev);
151 return ENOMEM;
152 }
153
154 /* Install the gatt. */
155 AGP_SET_APERTURE(dev, sc->aperture);
156
157 /* XXX: U3 scratch page? */
158
159 /* Enable the aperture and TLB. */
160 AGP_FLUSH_TLB(dev);
161
162 return (0);
163 }
164
165 static int
166 agp_apple_detach(device_t dev)
167 {
168 struct agp_apple_softc *sc = device_get_softc(dev);
169
170 agp_free_cdev(dev);
171
172 /* Disable the aperture and TLB */
173 pci_write_config(dev, UNIN_AGP_GART_CONTROL, UNIN_AGP_GART_INVAL, 4);
174 pci_write_config(dev, UNIN_AGP_GART_CONTROL, 0, 4);
175
176 if (sc->needs_2x_reset) {
177 pci_write_config(dev, UNIN_AGP_GART_CONTROL,
178 UNIN_AGP_GART_2XRESET, 4);
179 pci_write_config(dev, UNIN_AGP_GART_CONTROL, 0, 4);
180 }
181
182 AGP_SET_APERTURE(dev, 0);
183
184 agp_free_gatt(sc->gatt);
185 agp_free_res(dev);
186 return 0;
187 }
188
189 static uint32_t
190 agp_apple_get_aperture(device_t dev)
191 {
192 struct agp_apple_softc *sc = device_get_softc(dev);
193
194 return (sc->aperture);
195 }
196
197 static int
198 agp_apple_set_aperture(device_t dev, uint32_t aperture)
199 {
200 struct agp_apple_softc *sc = device_get_softc(dev);
201
202 /*
203 * Check for a multiple of 4 MB and make sure it is within the
204 * programmable range.
205 */
206 if (aperture % (4*1024*1024)
207 || aperture < 4*1024*1024
208 || aperture > ((sc->u3) ? 512 : 256)*1024*1024)
209 return EINVAL;
210
211 /* The aperture value is a multiple of 4 MB */
212 aperture /= (4*1024*1024);
213
214 pci_write_config(dev, UNIN_AGP_GART_BASE,
215 (sc->gatt->ag_physical & 0xfffff000) | aperture, 4);
216
217 return (0);
218 }
219
220 static int
221 agp_apple_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
222 {
223 struct agp_apple_softc *sc = device_get_softc(dev);
224
225 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
226 return EINVAL;
227
228 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
229 return (0);
230 }
231
232 static int
233 agp_apple_unbind_page(device_t dev, vm_offset_t offset)
234 {
235 struct agp_apple_softc *sc = device_get_softc(dev);
236
237 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
238 return EINVAL;
239
240 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
241 return (0);
242 }
243
244 static void
245 agp_apple_flush_tlb(device_t dev)
246 {
247 struct agp_apple_softc *sc = device_get_softc(dev);
248 uint32_t cntrl = UNIN_AGP_GART_ENABLE;
249
250 if (sc->u3)
251 cntrl |= UNIN_AGP_U3_GART_PERFRD;
252
253 pci_write_config(dev, UNIN_AGP_GART_CONTROL,
254 cntrl | UNIN_AGP_GART_INVAL, 4);
255 pci_write_config(dev, UNIN_AGP_GART_CONTROL, cntrl, 4);
256
257 if (sc->needs_2x_reset) {
258 pci_write_config(dev, UNIN_AGP_GART_CONTROL,
259 cntrl | UNIN_AGP_GART_2XRESET, 4);
260 pci_write_config(dev, UNIN_AGP_GART_CONTROL, cntrl, 4);
261 }
262 }
263
264 static device_method_t agp_apple_methods[] = {
265 /* Device interface */
266 DEVMETHOD(device_probe, agp_apple_probe),
267 DEVMETHOD(device_attach, agp_apple_attach),
268 DEVMETHOD(device_detach, agp_apple_detach),
269 DEVMETHOD(device_shutdown, bus_generic_shutdown),
270 DEVMETHOD(device_suspend, bus_generic_suspend),
271 DEVMETHOD(device_resume, bus_generic_resume),
272
273 /* AGP interface */
274 DEVMETHOD(agp_get_aperture, agp_apple_get_aperture),
275 DEVMETHOD(agp_set_aperture, agp_apple_set_aperture),
276 DEVMETHOD(agp_bind_page, agp_apple_bind_page),
277 DEVMETHOD(agp_unbind_page, agp_apple_unbind_page),
278 DEVMETHOD(agp_flush_tlb, agp_apple_flush_tlb),
279 DEVMETHOD(agp_enable, agp_generic_enable),
280 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
281 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
282 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
283 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
284
285 { 0, 0 }
286 };
287
288 static driver_t agp_apple_driver = {
289 "agp",
290 agp_apple_methods,
291 sizeof(struct agp_apple_softc),
292 };
293
294 static devclass_t agp_devclass;
295
296 DRIVER_MODULE(agp_apple, hostb, agp_apple_driver, agp_devclass, 0, 0);
297 MODULE_DEPEND(agp_apple, agp, 1, 1, 1);
298 MODULE_DEPEND(agp_apple, pci, 1, 1, 1);
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