1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
|
/* $OpenBSD: agp_apple.c,v 1.9 2024/05/24 06:02:53 jsg Exp $ */
/*
* Copyright (c) 2012 Martin Pieuchot <mpi@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
#include <dev/pci/agpvar.h>
#include <dev/pci/agpreg.h>
#include <machine/bus.h>
#define M (1024 * 1024)
struct agp_apple_softc {
struct device dev;
struct agp_softc *agpdev;
struct agp_gatt *gatt;
pci_chipset_tag_t asc_pc;
pcitag_t asc_tag;
bus_addr_t asc_apaddr;
bus_size_t asc_apsize;
int asc_flags;
#define AGP_APPLE_ISU3 (1 << 0)
};
int agp_apple_match(struct device *, void *, void *);
void agp_apple_attach(struct device *, struct device *, void *);
bus_size_t agp_apple_get_aperture(void *);
int agp_apple_set_aperture(void *sc, bus_size_t);
void agp_apple_bind_page(void *, bus_addr_t, paddr_t, int);
void agp_apple_unbind_page(void *, bus_addr_t);
void agp_apple_flush_tlb(void *);
int agp_apple_enable(void *, uint32_t);
const struct cfattach appleagp_ca = {
sizeof(struct agp_apple_softc), agp_apple_match, agp_apple_attach,
};
struct cfdriver appleagp_cd = {
NULL, "appleagp", DV_DULL
};
const struct agp_methods agp_apple_methods = {
agp_apple_bind_page,
agp_apple_unbind_page,
agp_apple_flush_tlb,
agp_apple_enable,
};
int
agp_apple_match(struct device *parent, void *match, void *aux)
{
struct agp_attach_args *aa = aux;
struct pci_attach_args *pa = aa->aa_pa;
if (agpbus_probe(aa) != 1 || PCI_VENDOR(pa->pa_id) != PCI_VENDOR_APPLE)
return (0);
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_APPLE_UNINORTH_AGP:
case PCI_PRODUCT_APPLE_PANGEA_AGP:
case PCI_PRODUCT_APPLE_UNINORTH2_AGP:
case PCI_PRODUCT_APPLE_UNINORTH_AGP3:
case PCI_PRODUCT_APPLE_INTREPID2_AGP:
/* XXX until KMS works with these bridges */
return (0);
case PCI_PRODUCT_APPLE_U3_AGP:
case PCI_PRODUCT_APPLE_U3L_AGP:
case PCI_PRODUCT_APPLE_K2_AGP:
return (1);
}
return (0);
}
void
agp_apple_attach(struct device *parent, struct device *self, void *aux)
{
struct agp_apple_softc *asc = (struct agp_apple_softc *)self;
struct agp_attach_args *aa = aux;
struct pci_attach_args *pa = aa->aa_pa;
struct agp_gatt *gatt;
asc->asc_tag = pa->pa_tag;
asc->asc_pc = pa->pa_pc;
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_APPLE_U3_AGP:
case PCI_PRODUCT_APPLE_U3L_AGP:
case PCI_PRODUCT_APPLE_K2_AGP:
asc->asc_flags |= AGP_APPLE_ISU3;
break;
default:
break;
}
/*
* XXX It looks like UniNorth GART only accepts an aperture
* base address of 0x00 certainly because it does not perform
* any physical-to-physical address translation.
*/
asc->asc_apaddr = 0x00;
pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_APBASE,
asc->asc_apaddr);
/*
* There's no way to read the aperture size but all UniNorth
* chips seem to support an aperture of 256M (and 512M for U3).
*/
asc->asc_apsize = 256 * M;
for (;;) {
gatt = agp_alloc_gatt(pa->pa_dmat, asc->asc_apsize);
if (gatt != NULL)
break;
asc->asc_apsize /= 2;
}
asc->gatt = gatt;
if (agp_apple_set_aperture(asc, asc->asc_apsize)) {
printf("failed to set aperture\n");
return;
}
agp_apple_flush_tlb(asc);
asc->agpdev = (struct agp_softc *)agp_attach_bus(pa, &agp_apple_methods,
asc->asc_apaddr, asc->asc_apsize, &asc->dev);
}
bus_size_t
agp_apple_get_aperture(void *dev)
{
struct agp_apple_softc *asc = dev;
return (asc->asc_apsize);
}
int
agp_apple_set_aperture(void *dev, bus_size_t aperture)
{
struct agp_apple_softc *asc = dev;
if (aperture % (4 * M) || aperture < (4 * M) || aperture > (256 * M))
return (EINVAL);
pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_ATTBASE,
(asc->gatt->ag_physical & 0xfffff000) | (aperture >> 22));
return (0);
}
#define flushd(p) __asm volatile("dcbst 0,%0; sync" ::"r"(p) : "memory")
void
agp_apple_bind_page(void *v, bus_addr_t off, paddr_t pa, int flags)
{
struct agp_apple_softc *asc = v;
uint32_t entry;
if (off >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT))
return;
if (asc->asc_flags & AGP_APPLE_ISU3)
entry = (pa >> PAGE_SHIFT | 0x80000000);
else
entry = htole32(pa | 0x01);
flushdcache((void *)pa, PAGE_SIZE);
asc->gatt->ag_virtual[off >> AGP_PAGE_SHIFT] = entry;
flushd(&asc->gatt->ag_virtual[off >> AGP_PAGE_SHIFT]);
}
void
agp_apple_unbind_page(void *v, bus_size_t off)
{
struct agp_apple_softc *asc = v;
if (off >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT))
return;
asc->gatt->ag_virtual[off >> AGP_PAGE_SHIFT] = 0;
flushd(&asc->gatt->ag_virtual[off >> AGP_PAGE_SHIFT]);
}
#undef flushd
void
agp_apple_flush_tlb(void *v)
{
struct agp_apple_softc *asc = v;
if (asc->asc_flags & AGP_APPLE_ISU3) {
pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_GARTCTRL,
AGP_APPLE_GART_ENABLE | AGP_APPLE_GART_PERFRD |
AGP_APPLE_GART_INVALIDATE);
pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_GARTCTRL,
AGP_APPLE_GART_ENABLE | AGP_APPLE_GART_PERFRD);
} else {
pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_GARTCTRL,
AGP_APPLE_GART_ENABLE | AGP_APPLE_GART_INVALIDATE);
pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_GARTCTRL,
AGP_APPLE_GART_ENABLE);
}
}
int
agp_apple_enable(void *v, uint32_t mode)
{
struct agp_apple_softc *asc = v;
if ((asc->asc_flags & AGP_APPLE_ISU3) == 0) {
/*
* GART invalidate/SBA reset? Linux and Darwin do something
* similar and it prevents GPU lockups with KMS.
*/
pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_GARTCTRL,
AGP_APPLE_GART_ENABLE | AGP_APPLE_GART_2XRESET);
pci_conf_write(asc->asc_pc, asc->asc_tag,
AGP_APPLE_GARTCTRL, AGP_APPLE_GART_ENABLE);
}
return (agp_generic_enable(asc->agpdev, mode));
}
|
