1 /* $OpenBSD: agp_ali.c,v 1.2 2002/07/25 23:31:04 fgsch Exp $ */
2 /* $NetBSD: agp_ali.c,v 1.2 2001/09/15 00:25:00 thorpej Exp $ */
3
4
5 /*-
6 * Copyright (c) 2000 Doug Rabson
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * $FreeBSD: src/sys/pci/agp_ali.c,v 1.3 2001/07/05 21:28:46 jhb Exp $
31 */
32
33
34
35 #include <sys/param.h>
36 #include <sys/kernel.h>
37 #include <sys/malloc.h>
38 #include <sys/systm.h>
39 #include <sys/proc.h>
40 #include <sys/conf.h>
41 #include <sys/device.h>
42 #include <sys/lock.h>
43 #include <sys/agpio.h>
44
45 #include <dev/pci/pcivar.h>
46 #include <dev/pci/pcireg.h>
47 #include <dev/pci/vga_pcivar.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 u_int32_t initial_aperture; /* aperture size at startup */
55 struct agp_gatt *gatt;
56 };
57
58 u_int32_t agp_ali_get_aperture(struct vga_pci_softc *);
59 int agp_ali_set_aperture(struct vga_pci_softc *sc, u_int32_t);
60 int agp_ali_bind_page(struct vga_pci_softc *, off_t, bus_addr_t);
61 int agp_ali_unbind_page(struct vga_pci_softc *, off_t);
62 void agp_ali_flush_tlb(struct vga_pci_softc *);
63
64 struct agp_methods agp_ali_methods = {
65 agp_ali_get_aperture,
66 agp_ali_set_aperture,
67 agp_ali_bind_page,
68 agp_ali_unbind_page,
69 agp_ali_flush_tlb,
70 agp_generic_enable,
71 agp_generic_alloc_memory,
72 agp_generic_free_memory,
73 agp_generic_bind_memory,
74 agp_generic_unbind_memory,
75 };
76
77 int
agp_ali_attach(struct vga_pci_softc * sc,struct pci_attach_args * pa,struct pci_attach_args * pchb_pa)78 agp_ali_attach(struct vga_pci_softc *sc, struct pci_attach_args *pa,
79 struct pci_attach_args *pchb_pa)
80 {
81 struct agp_ali_softc *asc;
82 struct agp_gatt *gatt;
83 pcireg_t reg;
84
85 asc = malloc(sizeof *asc, M_DEVBUF, M_NOWAIT);
86 if (asc == NULL) {
87 printf(": failed to allocate softc\n");
88 return (ENOMEM);
89 }
90 sc->sc_chipc = asc;
91 sc->sc_methods = &agp_ali_methods;
92
93 if (agp_map_aperture(sc) != 0) {
94 printf(": failed to map aperture\n");
95 free(asc, M_DEVBUF);
96 return (ENXIO);
97 }
98
99 asc->initial_aperture = agp_ali_get_aperture(sc);
100
101 for (;;) {
102 gatt = agp_alloc_gatt(sc);
103 if (gatt != NULL)
104 break;
105
106 /*
107 * Probably contigmalloc failure. Try reducing the
108 * aperture so that the gatt size reduces.
109 */
110 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) {
111 agp_generic_detach(sc);
112 printf(": failed to set aperture\n");
113 return (ENOMEM);
114 }
115 }
116 asc->gatt = gatt;
117
118 /* Install the gatt. */
119 reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE);
120 reg = (reg & 0xff) | gatt->ag_physical;
121 pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE, reg);
122
123 /* Enable the TLB. */
124 reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL);
125 reg = (reg & ~0xff) | 0x10;
126 pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL, reg);
127
128 return (0);
129 }
130
131 #if 0
132 int
133 agp_ali_detach(struct vga_pci_softc *sc)
134 {
135 int error;
136 pcireg_t reg;
137 struct agp_ali_softc *asc = sc->sc_chipc;
138
139 error = agp_generic_detach(sc);
140 if (error)
141 return (error);
142
143 /* Disable the TLB.. */
144 reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL);
145 reg &= ~0xff;
146 reg |= 0x90;
147 pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL, reg);
148
149 /* Put the aperture back the way it started. */
150 AGP_SET_APERTURE(sc, asc->initial_aperture);
151 reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE);
152 reg &= 0xff;
153 pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE, reg);
154
155 agp_free_gatt(sc, asc->gatt);
156 return (0);
157 }
158 #endif
159
160 #define M 1024*1024
161
162 static const u_int32_t agp_ali_table[] = {
163 0, /* 0 - invalid */
164 1, /* 1 - invalid */
165 2, /* 2 - invalid */
166 4*M, /* 3 - invalid */
167 8*M, /* 4 - invalid */
168 0, /* 5 - invalid */
169 16*M, /* 6 - invalid */
170 32*M, /* 7 - invalid */
171 64*M, /* 8 - invalid */
172 128*M, /* 9 - invalid */
173 256*M, /* 10 - invalid */
174 };
175 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0]))
176
177 u_int32_t
agp_ali_get_aperture(struct vga_pci_softc * sc)178 agp_ali_get_aperture(struct vga_pci_softc *sc)
179 {
180 int i;
181
182 /*
183 * The aperture size is derived from the low bits of attbase.
184 * I'm not sure this is correct..
185 */
186 i = (int)pci_conf_read(sc->sc_pc, sc->sc_pcitag,
187 AGP_ALI_ATTBASE) & 0xff;
188 if (i >= agp_ali_table_size)
189 return (0);
190 return (agp_ali_table[i]);
191 }
192
193 int
agp_ali_set_aperture(struct vga_pci_softc * sc,u_int32_t aperture)194 agp_ali_set_aperture(struct vga_pci_softc *sc, u_int32_t aperture)
195 {
196 int i;
197 pcireg_t reg;
198
199 for (i = 0; i < agp_ali_table_size; i++)
200 if (agp_ali_table[i] == aperture)
201 break;
202 if (i == agp_ali_table_size)
203 return EINVAL;
204
205 reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE);
206 reg &= ~0xff;
207 reg |= i;
208 pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_ATTBASE, reg);
209 return (0);
210 }
211
212 int
agp_ali_bind_page(struct vga_pci_softc * sc,off_t offset,bus_addr_t physical)213 agp_ali_bind_page(struct vga_pci_softc *sc, off_t offset, bus_addr_t physical)
214 {
215 struct agp_ali_softc *asc = sc->sc_chipc;
216
217 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT))
218 return (EINVAL);
219
220 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
221 return (0);
222 }
223
224 int
agp_ali_unbind_page(struct vga_pci_softc * sc,off_t offset)225 agp_ali_unbind_page(struct vga_pci_softc *sc, off_t offset)
226 {
227 struct agp_ali_softc *asc = sc->sc_chipc;
228
229 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT))
230 return (EINVAL);
231
232 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
233 return (0);
234 }
235
236 void
agp_ali_flush_tlb(struct vga_pci_softc * sc)237 agp_ali_flush_tlb(struct vga_pci_softc *sc)
238 {
239 pcireg_t reg;
240
241 reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL);
242 reg &= ~0xff;
243 reg |= 0x90;
244 pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL, reg);
245 reg &= ~0xff;
246 reg |= 0x10;
247 pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_ALI_TLBCTRL, reg);
248 }
249
250