1 /*-
2 * Copyright (c) 2010 Nathan Whitehorn
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: releng/10.4/sys/dev/agp/agp_apple.c 275406 2014-12-02 13:46:13Z tijl $");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/malloc.h>
33 #include <sys/kernel.h>
34 #include <sys/module.h>
35 #include <sys/bus.h>
36 #include <sys/lock.h>
37 #include <sys/mutex.h>
38 #include <sys/proc.h>
39
40 #include <machine/resource.h>
41
42 #include <dev/agp/agppriv.h>
43 #include <dev/agp/agpreg.h>
44 #include <dev/pci/pcivar.h>
45 #include <dev/pci/pcireg.h>
46
47 #include <vm/vm.h>
48 #include <vm/vm_object.h>
49 #include <vm/pmap.h>
50
51 #define UNIN_AGP_GART_BASE 0x8c
52 #define UNIN_AGP_BASE_ADDR 0x90
53 #define UNIN_AGP_GART_CONTROL 0x94
54
55 #define UNIN_AGP_GART_INVAL 0x00000001
56 #define UNIN_AGP_GART_ENABLE 0x00000100
57 #define UNIN_AGP_GART_2XRESET 0x00010000
58 #define UNIN_AGP_U3_GART_PERFRD 0x00080000
59
60 struct agp_apple_softc {
61 struct agp_softc agp;
62 uint32_t aperture;
63 struct agp_gatt *gatt;
64 int u3;
65 int needs_2x_reset;
66 };
67
68 static int
69 agp_apple_probe(device_t dev)
70 {
71
72 if (resource_disabled("agp", device_get_unit(dev)))
73 return (ENXIO);
74
75 if (pci_get_class(dev) != PCIC_BRIDGE
76 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
77 return (ENXIO);
78
79 if (agp_find_caps(dev) == 0)
80 return (ENXIO);
81
82 if (pci_get_class(dev) != PCIC_BRIDGE
83 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
84 return (ENXIO);
85
86 switch (pci_get_devid(dev)) {
87 case 0x0020106b:
88 case 0x0027106b:
89 device_set_desc(dev, "Apple UniNorth AGP Bridge");
90 return (BUS_PROBE_DEFAULT);
91 case 0x002d106b:
92 device_set_desc(dev, "Apple UniNorth 1.5 AGP Bridge");
93 return (BUS_PROBE_DEFAULT);
94 case 0x0034106b:
95 device_set_desc(dev, "Apple UniNorth 2 AGP Bridge");
96 return (BUS_PROBE_DEFAULT);
97 case 0x004b106b:
98 case 0x0058106b:
99 case 0x0059106b:
100 device_set_desc(dev, "Apple U3 AGP Bridge");
101 return (BUS_PROBE_DEFAULT);
102 case 0x0066106b:
103 device_set_desc(dev, "Apple Intrepid AGP Bridge");
104 return (BUS_PROBE_DEFAULT);
105 }
106
107 return (ENXIO);
108 }
109
110 static int
111 agp_apple_attach(device_t dev)
112 {
113 struct agp_apple_softc *sc = device_get_softc(dev);
114 int error;
115
116 /* Record quirks */
117 sc->needs_2x_reset = 0;
118 sc->u3 = 0;
119 switch (pci_get_devid(dev)) {
120 case 0x0020106b:
121 case 0x0027106b:
122 sc->needs_2x_reset = 1;
123 break;
124 case 0x004b106b:
125 case 0x0058106b:
126 case 0x0059106b:
127 sc->u3 = 1;
128 break;
129 }
130
131 /* Set the aperture bus address base (must be 0) */
132 pci_write_config(dev, UNIN_AGP_BASE_ADDR, 0, 4);
133 agp_set_aperture_resource(dev, -1);
134
135 error = agp_generic_attach(dev);
136 if (error)
137 return (error);
138
139 sc->aperture = 256*1024*1024;
140
141 for (sc->aperture = 256*1024*1024; sc->aperture >= 4*1024*1024;
142 sc->aperture /= 2) {
143 sc->gatt = agp_alloc_gatt(dev);
144 if (sc->gatt)
145 break;
146 }
147 if (sc->aperture < 4*1024*1024) {
148 agp_generic_detach(dev);
149 return ENOMEM;
150 }
151
152 /* Install the gatt. */
153 AGP_SET_APERTURE(dev, sc->aperture);
154
155 /* XXX: U3 scratch page? */
156
157 /* Enable the aperture and TLB. */
158 AGP_FLUSH_TLB(dev);
159
160 return (0);
161 }
162
163 static int
164 agp_apple_detach(device_t dev)
165 {
166 struct agp_apple_softc *sc = device_get_softc(dev);
167
168 agp_free_cdev(dev);
169
170 /* Disable the aperture and TLB */
171 pci_write_config(dev, UNIN_AGP_GART_CONTROL, UNIN_AGP_GART_INVAL, 4);
172 pci_write_config(dev, UNIN_AGP_GART_CONTROL, 0, 4);
173
174 if (sc->needs_2x_reset) {
175 pci_write_config(dev, UNIN_AGP_GART_CONTROL,
176 UNIN_AGP_GART_2XRESET, 4);
177 pci_write_config(dev, UNIN_AGP_GART_CONTROL, 0, 4);
178 }
179
180 AGP_SET_APERTURE(dev, 0);
181
182 agp_free_gatt(sc->gatt);
183 agp_free_res(dev);
184 return 0;
185 }
186
187 static uint32_t
188 agp_apple_get_aperture(device_t dev)
189 {
190 struct agp_apple_softc *sc = device_get_softc(dev);
191
192 return (sc->aperture);
193 }
194
195 static int
196 agp_apple_set_aperture(device_t dev, uint32_t aperture)
197 {
198 struct agp_apple_softc *sc = device_get_softc(dev);
199
200 /*
201 * Check for a multiple of 4 MB and make sure it is within the
202 * programmable range.
203 */
204 if (aperture % (4*1024*1024)
205 || aperture < 4*1024*1024
206 || aperture > ((sc->u3) ? 512 : 256)*1024*1024)
207 return EINVAL;
208
209 /* The aperture value is a multiple of 4 MB */
210 aperture /= (4*1024*1024);
211
212 pci_write_config(dev, UNIN_AGP_GART_BASE,
213 (sc->gatt->ag_physical & 0xfffff000) | aperture, 4);
214
215 return (0);
216 }
217
218 static int
219 agp_apple_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
220 {
221 struct agp_apple_softc *sc = device_get_softc(dev);
222
223 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
224 return EINVAL;
225
226 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
227 return (0);
228 }
229
230 static int
231 agp_apple_unbind_page(device_t dev, vm_offset_t offset)
232 {
233 struct agp_apple_softc *sc = device_get_softc(dev);
234
235 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
236 return EINVAL;
237
238 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
239 return (0);
240 }
241
242 static void
243 agp_apple_flush_tlb(device_t dev)
244 {
245 struct agp_apple_softc *sc = device_get_softc(dev);
246 uint32_t cntrl = UNIN_AGP_GART_ENABLE;
247
248 if (sc->u3)
249 cntrl |= UNIN_AGP_U3_GART_PERFRD;
250
251 pci_write_config(dev, UNIN_AGP_GART_CONTROL,
252 cntrl | UNIN_AGP_GART_INVAL, 4);
253 pci_write_config(dev, UNIN_AGP_GART_CONTROL, cntrl, 4);
254
255 if (sc->needs_2x_reset) {
256 pci_write_config(dev, UNIN_AGP_GART_CONTROL,
257 cntrl | UNIN_AGP_GART_2XRESET, 4);
258 pci_write_config(dev, UNIN_AGP_GART_CONTROL, cntrl, 4);
259 }
260 }
261
262 static device_method_t agp_apple_methods[] = {
263 /* Device interface */
264 DEVMETHOD(device_probe, agp_apple_probe),
265 DEVMETHOD(device_attach, agp_apple_attach),
266 DEVMETHOD(device_detach, agp_apple_detach),
267 DEVMETHOD(device_shutdown, bus_generic_shutdown),
268 DEVMETHOD(device_suspend, bus_generic_suspend),
269 DEVMETHOD(device_resume, bus_generic_resume),
270
271 /* AGP interface */
272 DEVMETHOD(agp_get_aperture, agp_apple_get_aperture),
273 DEVMETHOD(agp_set_aperture, agp_apple_set_aperture),
274 DEVMETHOD(agp_bind_page, agp_apple_bind_page),
275 DEVMETHOD(agp_unbind_page, agp_apple_unbind_page),
276 DEVMETHOD(agp_flush_tlb, agp_apple_flush_tlb),
277 DEVMETHOD(agp_enable, agp_generic_enable),
278 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
279 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
280 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
281 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
282
283 { 0, 0 }
284 };
285
286 static driver_t agp_apple_driver = {
287 "agp",
288 agp_apple_methods,
289 sizeof(struct agp_apple_softc),
290 };
291
292 static devclass_t agp_devclass;
293
294 DRIVER_MODULE(agp_apple, hostb, agp_apple_driver, agp_devclass, 0, 0);
295 MODULE_DEPEND(agp_apple, agp, 1, 1, 1);
296 MODULE_DEPEND(agp_apple, pci, 1, 1, 1);
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