1 | /* $NetBSD: agp_sis.c,v 1.14 2010/11/13 13:52:05 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_sis.c,v 1.3 2001/07/05 21:28:47 jhb Exp $ |
29 | */ |
30 | |
31 | #include <sys/cdefs.h> |
32 | __KERNEL_RCSID(0, "$NetBSD: agp_sis.c,v 1.14 2010/11/13 13:52:05 uebayasi Exp $" ); |
33 | |
34 | #include <sys/param.h> |
35 | #include <sys/systm.h> |
36 | #include <sys/malloc.h> |
37 | #include <sys/kernel.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_sis_softc { |
51 | u_int32_t initial_aperture; /* aperture size at startup */ |
52 | struct agp_gatt *gatt; |
53 | }; |
54 | |
55 | static u_int32_t agp_sis_get_aperture(struct agp_softc *); |
56 | static int agp_sis_set_aperture(struct agp_softc *, u_int32_t); |
57 | static int agp_sis_bind_page(struct agp_softc *, off_t, bus_addr_t); |
58 | static int agp_sis_unbind_page(struct agp_softc *, off_t); |
59 | static void agp_sis_flush_tlb(struct agp_softc *); |
60 | |
61 | static struct agp_methods agp_sis_methods = { |
62 | agp_sis_get_aperture, |
63 | agp_sis_set_aperture, |
64 | agp_sis_bind_page, |
65 | agp_sis_unbind_page, |
66 | agp_sis_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 | int |
75 | agp_sis_attach(device_t parent, device_t self, void *aux) |
76 | { |
77 | struct agp_softc *sc = device_private(self); |
78 | struct pci_attach_args *pa = aux; |
79 | struct agp_sis_softc *ssc; |
80 | struct agp_gatt *gatt; |
81 | pcireg_t reg; |
82 | |
83 | ssc = malloc(sizeof *ssc, M_AGP, M_NOWAIT); |
84 | if (ssc == NULL) { |
85 | aprint_error(": can't allocate chipset-specific softc\n" ); |
86 | return ENOMEM; |
87 | } |
88 | sc->as_methods = &agp_sis_methods; |
89 | sc->as_chipc = ssc; |
90 | pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, |
91 | NULL); |
92 | |
93 | if (agp_map_aperture(pa, sc, AGP_APBASE) != 0) { |
94 | aprint_error(": can't map aperture\n" ); |
95 | free(ssc, M_AGP); |
96 | return ENXIO; |
97 | } |
98 | |
99 | ssc->initial_aperture = AGP_GET_APERTURE(sc); |
100 | |
101 | for (;;) { |
102 | gatt = agp_alloc_gatt(sc); |
103 | if (gatt) |
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 | aprint_error(": failed to set aperture\n" ); |
113 | return ENOMEM; |
114 | } |
115 | } |
116 | ssc->gatt = gatt; |
117 | |
118 | /* Install the gatt. */ |
119 | pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_ATTBASE, |
120 | gatt->ag_physical); |
121 | |
122 | /* Enable the aperture and auto-tlb-inval */ |
123 | reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL); |
124 | reg |= (0x05 << 24) | 3; |
125 | pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL, reg); |
126 | |
127 | return 0; |
128 | } |
129 | |
130 | #if 0 |
131 | static int |
132 | agp_sis_detach(struct agp_softc *sc) |
133 | { |
134 | struct agp_sis_softc *ssc = sc->as_chipc; |
135 | pcireg_t reg; |
136 | int error; |
137 | |
138 | error = agp_generic_detach(sc); |
139 | if (error) |
140 | return error; |
141 | |
142 | reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL); |
143 | reg &= ~3; |
144 | reg &= 0x00ffffff; |
145 | pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL, reg); |
146 | |
147 | /* Put the aperture back the way it started. */ |
148 | AGP_SET_APERTURE(sc, ssc->initial_aperture); |
149 | |
150 | agp_free_gatt(sc, ssc->gatt); |
151 | return 0; |
152 | } |
153 | #endif |
154 | |
155 | static u_int32_t |
156 | agp_sis_get_aperture(struct agp_softc *sc) |
157 | { |
158 | int gws; |
159 | |
160 | /* |
161 | * The aperture size is equal to 4M<<gws. |
162 | */ |
163 | gws = (pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL)&0x70) >> 4; |
164 | return (4*1024*1024) << gws; |
165 | } |
166 | |
167 | static int |
168 | agp_sis_set_aperture(struct agp_softc *sc, u_int32_t aperture) |
169 | { |
170 | int gws; |
171 | pcireg_t reg; |
172 | |
173 | /* |
174 | * Check for a power of two and make sure its within the |
175 | * programmable range. |
176 | */ |
177 | if (aperture & (aperture - 1) |
178 | || aperture < 4*1024*1024 |
179 | || aperture > 256*1024*1024) |
180 | return EINVAL; |
181 | |
182 | gws = ffs(aperture / 4*1024*1024) - 1; |
183 | |
184 | reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL); |
185 | reg &= ~0x00000070; |
186 | reg |= gws << 4; |
187 | pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_WINCTRL, reg); |
188 | |
189 | return 0; |
190 | } |
191 | |
192 | static int |
193 | agp_sis_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) |
194 | { |
195 | struct agp_sis_softc *ssc = sc->as_chipc; |
196 | |
197 | if (offset < 0 || offset >= (ssc->gatt->ag_entries << AGP_PAGE_SHIFT)) |
198 | return EINVAL; |
199 | |
200 | ssc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; |
201 | return 0; |
202 | } |
203 | |
204 | static int |
205 | agp_sis_unbind_page(struct agp_softc *sc, off_t offset) |
206 | { |
207 | struct agp_sis_softc *ssc = sc->as_chipc; |
208 | |
209 | if (offset < 0 || offset >= (ssc->gatt->ag_entries << AGP_PAGE_SHIFT)) |
210 | return EINVAL; |
211 | |
212 | ssc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; |
213 | return 0; |
214 | } |
215 | |
216 | static void |
217 | agp_sis_flush_tlb(struct agp_softc *sc) |
218 | { |
219 | pcireg_t reg; |
220 | |
221 | reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_SIS_TLBFLUSH); |
222 | reg &= 0xffffff00; |
223 | reg |= 0x02; |
224 | pci_conf_write(sc->as_pc, sc->as_tag, AGP_SIS_TLBFLUSH, reg); |
225 | } |
226 | |