1 /* $NetBSD: agp_apple.c,v 1.8 2019/11/10 21:16:36 chs Exp $ */
2
3 /*-
4 * Copyright (c) 2007 Michael Lorenz
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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: agp_apple.c,v 1.8 2019/11/10 21:16:36 chs Exp $");
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/malloc.h>
34 #include <sys/kernel.h>
35 #include <sys/proc.h>
36 #include <sys/conf.h>
37 #include <sys/device.h>
38 #include <sys/agpio.h>
39
40 #include <dev/pci/pcivar.h>
41 #include <dev/pci/pcireg.h>
42 #include <dev/pci/agpvar.h>
43 #include <dev/pci/agpreg.h>
44
45 #include <sys/bus.h>
46
47 #define APPLE_UNINORTH_GART_BASE 0x8c
48 #define APPLE_UNINORTH_GART_BASE_ADDR 0x90
49 #define APPLE_UNINORTH_GART_CTRL 0x94
50 #define APPLE_UNINORTH_GART_INVAL 0x00000001
51 #define APPLE_UNINORTH_GART_ENABLE 0x00000100
52 #define APPLE_UNINORTH_GART_2XRESET 0x00010000
53 #define APPLE_UNINORTH_GART_PERFRD 0x00080000
54
55 static u_int32_t agp_apple_get_aperture(struct agp_softc *);
56 static int agp_apple_set_aperture(struct agp_softc *, u_int32_t);
57 static int agp_apple_bind_page(struct agp_softc *, off_t, bus_addr_t);
58 static int agp_apple_unbind_page(struct agp_softc *, off_t);
59 static void agp_apple_flush_tlb(struct agp_softc *);
60
61 static struct agp_methods agp_apple_methods = {
62 agp_apple_get_aperture,
63 agp_apple_set_aperture,
64 agp_apple_bind_page,
65 agp_apple_unbind_page,
66 agp_apple_flush_tlb,
67 agp_generic_enable,
68 agp_generic_alloc_memory,
69 agp_generic_free_memory,
70 agp_generic_bind_memory,
71 agp_generic_unbind_memory,
72 };
73
74 struct agp_apple_softc {
75 u_int32_t initial_aperture; /* aperture size at startup */
76 struct agp_gatt *gatt;
77 };
78
79 int
agp_apple_attach(device_t parent,device_t self,void * aux)80 agp_apple_attach(device_t parent, device_t self, void *aux)
81 {
82 struct pci_attach_args *pa = aux;
83 struct agp_softc *sc = device_private(self);
84 struct agp_apple_softc *asc;
85 struct agp_gatt *gatt;
86
87 asc = malloc(sizeof *asc, M_AGP, M_WAITOK|M_ZERO);
88 sc->as_chipc = asc;
89 sc->as_methods = &agp_apple_methods;
90 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff,
91 NULL);
92
93 sc->as_apaddr = 0;
94 sc->as_apsize = 8 * 1024 * 1024;
95 sc->as_apflags = 0;
96 sc->as_pc = pa->pa_pc;
97 sc->as_tag = pa->pa_tag;
98 sc->as_apt = pa->pa_memt;
99
100 asc->initial_aperture = sc->as_apsize;
101
102 for (;;) {
103 gatt = agp_alloc_gatt(sc);
104 if (gatt)
105 break;
106 sc->as_apsize = sc->as_apsize >> 1;
107 if (sc->as_apsize == 0) {
108 aprint_error(": can't set aperture size\n");
109 return ENOMEM;
110 }
111 }
112 asc->gatt = gatt;
113
114 /* Install the gatt. */
115 aprint_error("gatt: %08jx %ju MB\n", (uintmax_t)gatt->ag_physical,
116 (uintmax_t)(sc->as_apsize >> 20));
117 pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_BASE,
118 (gatt->ag_physical & 0xfffff000) |
119 (sc->as_apsize >> 22));
120
121 /* Enable the aperture. */
122 pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_CTRL,
123 APPLE_UNINORTH_GART_ENABLE);
124 pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_CTRL,
125 APPLE_UNINORTH_GART_ENABLE | APPLE_UNINORTH_GART_INVAL);
126 pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_CTRL,
127 APPLE_UNINORTH_GART_ENABLE);
128 return 0;
129 }
130
131 static u_int32_t
agp_apple_get_aperture(struct agp_softc * sc)132 agp_apple_get_aperture(struct agp_softc *sc)
133 {
134 #if 0
135 u_int32_t apsize = 0;
136
137 aprint_error("%s: ", __func__);
138 apsize = pci_conf_read(sc->as_pc, sc->as_tag,
139 APPLE_UNINORTH_GART_BASE) & 0x0000ffff;
140 aprint_error("%08x\n", apsize);
141 return (apsize << 22);
142 #else
143 return sc->as_apsize;
144 #endif
145 }
146
147 static int
agp_apple_set_aperture(struct agp_softc * sc,u_int32_t aperture)148 agp_apple_set_aperture(struct agp_softc *sc, u_int32_t aperture)
149 {
150 pcireg_t reg;
151
152 aprint_error("%s: %08x\n", __func__, aperture);
153 reg = pci_conf_read(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_BASE)
154 & 0xfffff000;
155 reg |= ((aperture >> 22) & 0xfff);
156 pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_BASE, reg);
157 sc->as_apsize = aperture;
158 return 0;
159 }
160
161 static int
agp_apple_bind_page(struct agp_softc * sc,off_t offset,bus_addr_t physical)162 agp_apple_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical)
163 {
164 struct agp_apple_softc *asc = sc->as_chipc;
165
166 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT))
167 return EINVAL;
168
169 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = htole32(physical);
170 return 0;
171 }
172
173 static int
agp_apple_unbind_page(struct agp_softc * sc,off_t offset)174 agp_apple_unbind_page(struct agp_softc *sc, off_t offset)
175 {
176 struct agp_apple_softc *asc = sc->as_chipc;
177
178 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT))
179 return EINVAL;
180
181 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
182 return 0;
183 }
184
185 static void
agp_apple_flush_tlb(struct agp_softc * sc)186 agp_apple_flush_tlb(struct agp_softc *sc)
187 {
188
189 pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_CTRL,
190 APPLE_UNINORTH_GART_ENABLE);
191 pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_CTRL,
192 APPLE_UNINORTH_GART_ENABLE | APPLE_UNINORTH_GART_INVAL);
193 pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_CTRL,
194 APPLE_UNINORTH_GART_ENABLE);
195 }
196