1 | /* $NetBSD: agp_ali.c,v 1.16 2010/11/13 13:52:04 uebayasi Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2000 Doug Rabson |
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 | * $FreeBSD: src/sys/pci/agp_ali.c,v 1.3 2001/07/05 21:28:46 jhb Exp $ |
29 | */ |
30 | |
31 | #include <sys/cdefs.h> |
32 | __KERNEL_RCSID(0, "$NetBSD: agp_ali.c,v 1.16 2010/11/13 13:52:04 uebayasi Exp $" ); |
33 | |
34 | #include <sys/param.h> |
35 | #include <sys/kernel.h> |
36 | #include <sys/malloc.h> |
37 | #include <sys/systm.h> |
38 | #include <sys/proc.h> |
39 | #include <sys/conf.h> |
40 | #include <sys/device.h> |
41 | #include <sys/agpio.h> |
42 | |
43 | #include <dev/pci/pcivar.h> |
44 | #include <dev/pci/pcireg.h> |
45 | #include <dev/pci/agpvar.h> |
46 | #include <dev/pci/agpreg.h> |
47 | |
48 | #include <sys/bus.h> |
49 | |
50 | struct agp_ali_softc { |
51 | u_int32_t initial_aperture; /* aperture size at startup */ |
52 | struct agp_gatt *gatt; |
53 | }; |
54 | |
55 | static u_int32_t agp_ali_get_aperture(struct agp_softc *); |
56 | static int agp_ali_set_aperture(struct agp_softc *sc, u_int32_t); |
57 | static int agp_ali_bind_page(struct agp_softc *, off_t, bus_addr_t); |
58 | static int agp_ali_unbind_page(struct agp_softc *, off_t); |
59 | static void agp_ali_flush_tlb(struct agp_softc *); |
60 | |
61 | |
62 | static struct agp_methods agp_ali_methods = { |
63 | agp_ali_get_aperture, |
64 | agp_ali_set_aperture, |
65 | agp_ali_bind_page, |
66 | agp_ali_unbind_page, |
67 | agp_ali_flush_tlb, |
68 | agp_generic_enable, |
69 | agp_generic_alloc_memory, |
70 | agp_generic_free_memory, |
71 | agp_generic_bind_memory, |
72 | agp_generic_unbind_memory, |
73 | }; |
74 | |
75 | int |
76 | agp_ali_attach(device_t parent, device_t self, void *aux) |
77 | { |
78 | struct agp_softc *sc = device_private(self); |
79 | struct agp_ali_softc *asc; |
80 | struct pci_attach_args *pa = aux; |
81 | struct agp_gatt *gatt; |
82 | pcireg_t reg; |
83 | |
84 | asc = malloc(sizeof *asc, M_AGP, M_NOWAIT); |
85 | if (asc == NULL) { |
86 | aprint_error(": failed to allocate softc\n" ); |
87 | return ENOMEM; |
88 | } |
89 | sc->as_chipc = asc; |
90 | sc->as_methods = &agp_ali_methods; |
91 | |
92 | if (agp_map_aperture(pa, sc, AGP_APBASE) != 0) { |
93 | aprint_error(": failed to map aperture\n" ); |
94 | free(asc, M_AGP); |
95 | return ENXIO; |
96 | } |
97 | |
98 | pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, |
99 | NULL); |
100 | |
101 | asc->initial_aperture = agp_ali_get_aperture(sc); |
102 | |
103 | for (;;) { |
104 | gatt = agp_alloc_gatt(sc); |
105 | if (gatt != NULL) |
106 | break; |
107 | |
108 | /* |
109 | * Probably contigmalloc failure. Try reducing the |
110 | * aperture so that the gatt size reduces. |
111 | */ |
112 | if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { |
113 | agp_generic_detach(sc); |
114 | aprint_error(": failed to set aperture\n" ); |
115 | return ENOMEM; |
116 | } |
117 | } |
118 | asc->gatt = gatt; |
119 | |
120 | /* Install the gatt. */ |
121 | reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_ALI_ATTBASE); |
122 | reg = (reg & 0xfff) | (gatt->ag_physical & ~0xfff); |
123 | pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_ALI_ATTBASE, reg); |
124 | |
125 | /* Enable the TLB. */ |
126 | reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_ALI_TLBCTRL); |
127 | reg = (reg & ~0xff) | 0x10; |
128 | pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_ALI_TLBCTRL, reg); |
129 | |
130 | return 0; |
131 | } |
132 | |
133 | #if 0 |
134 | static int |
135 | agp_ali_detach(struct agp_softc *sc) |
136 | { |
137 | int error; |
138 | pcireg_t reg; |
139 | struct agp_ali_softc *asc = sc->as_chipc; |
140 | |
141 | error = agp_generic_detach(sc); |
142 | if (error) |
143 | return error; |
144 | |
145 | /* Disable the TLB.. */ |
146 | reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL); |
147 | reg &= ~0xff; |
148 | reg |= 0x90; |
149 | pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); |
150 | |
151 | /* Put the aperture back the way it started. */ |
152 | AGP_SET_APERTURE(sc, asc->initial_aperture); |
153 | reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE); |
154 | reg &= 0xf; |
155 | pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE, reg); |
156 | |
157 | agp_free_gatt(sc, asc->gatt); |
158 | return 0; |
159 | } |
160 | #endif |
161 | |
162 | #define M 1024*1024 |
163 | |
164 | static const u_int32_t agp_ali_table[] = { |
165 | 0, /* 0 - invalid */ |
166 | 1, /* 1 - invalid */ |
167 | 2, /* 2 - invalid */ |
168 | 4*M, /* 3 */ |
169 | 8*M, /* 4 */ |
170 | 0, /* 5 - Reserved */ |
171 | 16*M, /* 6 */ |
172 | 32*M, /* 7 */ |
173 | 64*M, /* 8 */ |
174 | 128*M, /* 9 */ |
175 | 256*M, /* 10 */ |
176 | }; |
177 | #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0])) |
178 | |
179 | static u_int32_t |
180 | agp_ali_get_aperture(struct agp_softc *sc) |
181 | { |
182 | int i; |
183 | |
184 | /* |
185 | * The aperture size is derived from the low bits of attbase. |
186 | * I'm not sure this is correct.. |
187 | */ |
188 | i = (int)pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE) & 0xf; |
189 | if (i >= agp_ali_table_size) |
190 | return 0; |
191 | return agp_ali_table[i]; |
192 | } |
193 | |
194 | static int |
195 | agp_ali_set_aperture(struct agp_softc *sc, u_int32_t aperture) |
196 | { |
197 | int i; |
198 | pcireg_t reg; |
199 | |
200 | if (aperture & (aperture - 1) || aperture < 1*M) |
201 | return EINVAL; |
202 | |
203 | for (i = 0; i < agp_ali_table_size; i++) |
204 | if (agp_ali_table[i] == aperture) |
205 | break; |
206 | if (i == agp_ali_table_size) |
207 | return EINVAL; |
208 | |
209 | reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE); |
210 | reg &= ~0xf; |
211 | reg |= i; |
212 | pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE, reg); |
213 | return 0; |
214 | } |
215 | |
216 | static int |
217 | agp_ali_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) |
218 | { |
219 | struct agp_ali_softc *asc = sc->as_chipc; |
220 | |
221 | if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) |
222 | return EINVAL; |
223 | |
224 | asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; |
225 | return 0; |
226 | } |
227 | |
228 | static int |
229 | agp_ali_unbind_page(struct agp_softc *sc, off_t offset) |
230 | { |
231 | struct agp_ali_softc *asc = sc->as_chipc; |
232 | |
233 | if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) |
234 | return EINVAL; |
235 | |
236 | asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; |
237 | return 0; |
238 | } |
239 | |
240 | static void |
241 | agp_ali_flush_tlb(struct agp_softc *sc) |
242 | { |
243 | pcireg_t reg; |
244 | |
245 | reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL); |
246 | reg &= ~0xff; |
247 | reg |= 0x90; |
248 | pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); |
249 | reg &= ~0xff; |
250 | reg |= 0x10; |
251 | pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg); |
252 | } |
253 | |