FreeBSD/Linux Kernel Cross Reference
sys/dev/pci/agp_ali.c
1 /* $NetBSD: agp_ali.c,v 1.4 2003/01/31 00:07:39 thorpej 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 1.4 2003/01/31 00:07:39 thorpej 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/lock.h>
42 #include <sys/agpio.h>
43
44 #include <uvm/uvm_extern.h>
45
46 #include <dev/pci/pcivar.h>
47 #include <dev/pci/pcireg.h>
48 #include <dev/pci/agpvar.h>
49 #include <dev/pci/agpreg.h>
50
51 #include <machine/bus.h>
52
53 struct agp_ali_softc {
54 struct agp_softc agp;
55 u_int32_t initial_aperture; /* aperture size at startup */
56 struct agp_gatt *gatt;
57 };
58
59 static u_int32_t agp_ali_get_aperture(struct agp_softc *);
60 static int agp_ali_set_aperture(struct agp_softc *sc, u_int32_t);
61 static int agp_ali_bind_page(struct agp_softc *, off_t, bus_addr_t);
62 static int agp_ali_unbind_page(struct agp_softc *, off_t);
63 static void agp_ali_flush_tlb(struct agp_softc *);
64
65
66 struct agp_methods agp_ali_methods = {
67 agp_ali_get_aperture,
68 agp_ali_set_aperture,
69 agp_ali_bind_page,
70 agp_ali_unbind_page,
71 agp_ali_flush_tlb,
72 agp_generic_enable,
73 agp_generic_alloc_memory,
74 agp_generic_free_memory,
75 agp_generic_bind_memory,
76 agp_generic_unbind_memory,
77 };
78
79 int
80 agp_ali_attach(struct device *parent, struct device *self, void *aux)
81 {
82 struct agp_softc *sc = (struct agp_softc *)self;
83 struct agp_ali_softc *asc;
84 struct pci_attach_args *pa = aux;
85 struct agp_gatt *gatt;
86 pcireg_t reg;
87
88 asc = malloc(sizeof *asc, M_AGP, M_NOWAIT);
89 if (asc == NULL) {
90 aprint_error(": failed to allocate softc\n");
91 return ENOMEM;
92 }
93 sc->as_chipc = asc;
94 sc->as_methods = &agp_ali_methods;
95
96 if (agp_map_aperture(pa, sc) != 0) {
97 aprint_error(": failed to map aperture\n");
98 free(asc, M_AGP);
99 return ENXIO;
100 }
101
102 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff,
103 NULL);
104
105 asc->initial_aperture = agp_ali_get_aperture(sc);
106
107 for (;;) {
108 gatt = agp_alloc_gatt(sc);
109 if (gatt != NULL)
110 break;
111
112 /*
113 * Probably contigmalloc failure. Try reducing the
114 * aperture so that the gatt size reduces.
115 */
116 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) {
117 agp_generic_detach(sc);
118 aprint_error(": failed to set aperture\n");
119 return ENOMEM;
120 }
121 }
122 asc->gatt = gatt;
123
124 /* Install the gatt. */
125 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_ALI_ATTBASE);
126 reg = (reg & 0xff) | gatt->ag_physical;
127 pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_ALI_ATTBASE, reg);
128
129 /* Enable the TLB. */
130 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_ALI_TLBCTRL);
131 reg = (reg & ~0xff) | 0x10;
132 pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_ALI_TLBCTRL, reg);
133
134 return 0;
135 }
136
137 #if 0
138 static int
139 agp_ali_detach(struct agp_softc *sc)
140 {
141 int error;
142 pcireg_t reg;
143 struct agp_ali_softc *asc = sc->as_chipc;
144
145 error = agp_generic_detach(sc);
146 if (error)
147 return error;
148
149 /* Disable the TLB.. */
150 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL);
151 reg &= ~0xff;
152 reg |= 0x90;
153 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg);
154
155 /* Put the aperture back the way it started. */
156 AGP_SET_APERTURE(sc, asc->initial_aperture);
157 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE);
158 reg &= 0xff;
159 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE, reg);
160
161 agp_free_gatt(sc, asc->gatt);
162 return 0;
163 }
164 #endif
165
166 #define M 1024*1024
167
168 static u_int32_t agp_ali_table[] = {
169 0, /* 0 - invalid */
170 1, /* 1 - invalid */
171 2, /* 2 - invalid */
172 4*M, /* 3 - invalid */
173 8*M, /* 4 - invalid */
174 0, /* 5 - invalid */
175 16*M, /* 6 - invalid */
176 32*M, /* 7 - invalid */
177 64*M, /* 8 - invalid */
178 128*M, /* 9 - invalid */
179 256*M, /* 10 - invalid */
180 };
181 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0]))
182
183 static u_int32_t
184 agp_ali_get_aperture(struct agp_softc *sc)
185 {
186 int i;
187
188 /*
189 * The aperture size is derived from the low bits of attbase.
190 * I'm not sure this is correct..
191 */
192 i = (int)pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE) & 0xff;
193 if (i >= agp_ali_table_size)
194 return 0;
195 return agp_ali_table[i];
196 }
197
198 static int
199 agp_ali_set_aperture(struct agp_softc *sc, u_int32_t aperture)
200 {
201 int i;
202 pcireg_t reg;
203
204 for (i = 0; i < agp_ali_table_size; i++)
205 if (agp_ali_table[i] == aperture)
206 break;
207 if (i == agp_ali_table_size)
208 return EINVAL;
209
210 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE);
211 reg &= ~0xff;
212 reg |= i;
213 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE, reg);
214 return 0;
215 }
216
217 static int
218 agp_ali_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical)
219 {
220 struct agp_ali_softc *asc = sc->as_chipc;
221
222 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT))
223 return EINVAL;
224
225 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
226 return 0;
227 }
228
229 static int
230 agp_ali_unbind_page(struct agp_softc *sc, off_t offset)
231 {
232 struct agp_ali_softc *asc = sc->as_chipc;
233
234 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT))
235 return EINVAL;
236
237 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
238 return 0;
239 }
240
241 static void
242 agp_ali_flush_tlb(struct agp_softc *sc)
243 {
244 pcireg_t reg;
245
246 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL);
247 reg &= ~0xff;
248 reg |= 0x90;
249 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg);
250 reg &= ~0xff;
251 reg |= 0x10;
252 pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg);
253 }
Cache object: 79a1c4571a3133da8b397bd4171b8838
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