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