1 /* $OpenBSD: agp_sis.c,v 1.21 2024/05/24 06:02:53 jsg Exp $ */
2 /* $NetBSD: agp_sis.c,v 1.2 2001/09/15 00:25:00 thorpej Exp $ */
3
4 /*-
5 * Copyright (c) 2000 Doug Rabson
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: src/sys/pci/agp_sis.c,v 1.3 2001/07/05 21:28:47 jhb Exp $
30 */
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/device.h>
35
36 #include <dev/pci/pcivar.h>
37 #include <dev/pci/pcireg.h>
38 #include <dev/pci/pcidevs.h>
39 #include <dev/pci/agpvar.h>
40 #include <dev/pci/agpreg.h>
41
42 #include <machine/bus.h>
43
44 struct agp_sis_softc {
45 struct device dev;
46 struct agp_softc *agpdev;
47 struct agp_gatt *gatt;
48 pci_chipset_tag_t ssc_pc;
49 pcitag_t ssc_tag;
50 bus_addr_t ssc_apaddr;
51 bus_size_t ssc_apsize;
52 pcireg_t ssc_winctrl; /* saved over suspend/resume */
53 };
54
55 void agp_sis_attach(struct device *, struct device *, void *);
56 int agp_sis_activate(struct device *, int);
57 void agp_sis_save(struct agp_sis_softc *);
58 void agp_sis_restore(struct agp_sis_softc *);
59 int agp_sis_probe(struct device *, void *, void *);
60 bus_size_t agp_sis_get_aperture(void *);
61 int agp_sis_set_aperture(void *, bus_size_t);
62 void agp_sis_bind_page(void *, bus_addr_t, paddr_t, int);
63 void agp_sis_unbind_page(void *, bus_addr_t);
64 void agp_sis_flush_tlb(void *);
65
66 const struct cfattach sisagp_ca = {
67 sizeof(struct agp_sis_softc), agp_sis_probe, agp_sis_attach,
68 NULL, agp_sis_activate
69 };
70
71 struct cfdriver sisagp_cd = {
72 NULL, "sisagp", DV_DULL
73 };
74
75 const struct agp_methods agp_sis_methods = {
76 agp_sis_bind_page,
77 agp_sis_unbind_page,
78 agp_sis_flush_tlb,
79 };
80
81 int
agp_sis_probe(struct device * parent,void * match,void * aux)82 agp_sis_probe(struct device *parent, void *match, void *aux)
83 {
84 struct agp_attach_args *aa = aux;
85 struct pci_attach_args *pa = aa->aa_pa;
86
87 /* Must be a pchb, don't attach to iommu-style agp devs */
88 if (agpbus_probe(aa) == 1 && PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SIS &&
89 PCI_PRODUCT(pa->pa_id) != PCI_PRODUCT_SIS_755 &&
90 PCI_PRODUCT(pa->pa_id) != PCI_PRODUCT_SIS_760)
91 return (1);
92 return (0);
93 }
94
95
96 void
agp_sis_attach(struct device * parent,struct device * self,void * aux)97 agp_sis_attach(struct device *parent, struct device *self, void *aux)
98 {
99 struct agp_sis_softc *ssc = (struct agp_sis_softc *)self;
100 struct agp_attach_args *aa = aux;
101 struct pci_attach_args *pa = aa->aa_pa;
102 struct agp_gatt *gatt;
103 pcireg_t reg;
104
105 if (pci_mapreg_info(pa->pa_pc, pa->pa_tag, AGP_APBASE,
106 PCI_MAPREG_TYPE_MEM, &ssc->ssc_apaddr, NULL, NULL) != 0) {
107 printf(": can't get aperture info\n");
108 return;
109 }
110
111 ssc->ssc_pc = pa->pa_pc;
112 ssc->ssc_tag = pa->pa_tag;
113 ssc->ssc_apsize = agp_sis_get_aperture(ssc);
114
115 for (;;) {
116 gatt = agp_alloc_gatt(pa->pa_dmat, ssc->ssc_apsize);
117 if (gatt != NULL)
118 break;
119
120 /*
121 * Probably failed to alloc contiguous memory. Try reducing the
122 * aperture so that the gatt size reduces.
123 */
124 ssc->ssc_apsize /= 2;
125 if (agp_sis_set_aperture(ssc, ssc->ssc_apsize)) {
126 printf("can't set aperture size\n");
127 return;
128 }
129 }
130 ssc->gatt = gatt;
131
132 /* Install the gatt. */
133 pci_conf_write(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_ATTBASE,
134 gatt->ag_physical);
135
136 /* Enable the aperture and auto-tlb-inval */
137 reg = pci_conf_read(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_WINCTRL);
138 reg |= (0x05 << 24) | 3;
139 pci_conf_write(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_WINCTRL, reg);
140
141 ssc->agpdev = (struct agp_softc *)agp_attach_bus(pa, &agp_sis_methods,
142 ssc->ssc_apaddr, ssc->ssc_apsize, &ssc->dev);
143 return;
144 }
145
146 int
agp_sis_activate(struct device * arg,int act)147 agp_sis_activate(struct device *arg, int act)
148 {
149 struct agp_sis_softc *ssc = (struct agp_sis_softc *)arg;
150
151 switch (act) {
152 case DVACT_SUSPEND:
153 agp_sis_save(ssc);
154 break;
155 case DVACT_RESUME:
156 agp_sis_restore(ssc);
157 break;
158 }
159
160 return (0);
161 }
162
163 void
agp_sis_save(struct agp_sis_softc * ssc)164 agp_sis_save(struct agp_sis_softc *ssc)
165 {
166 ssc->ssc_winctrl = pci_conf_read(ssc->ssc_pc, ssc->ssc_tag,
167 AGP_SIS_WINCTRL);
168 }
169
170 void
agp_sis_restore(struct agp_sis_softc * ssc)171 agp_sis_restore(struct agp_sis_softc *ssc)
172 {
173 /* Install the gatt. */
174 pci_conf_write(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_ATTBASE,
175 ssc->gatt->ag_physical);
176
177 /*
178 * Enable the aperture, reset the aperture size and enable and
179 * auto-tlb-inval.
180 */
181 pci_conf_write(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_WINCTRL,
182 ssc->ssc_winctrl);
183 }
184
185 bus_size_t
agp_sis_get_aperture(void * sc)186 agp_sis_get_aperture(void *sc)
187 {
188 struct agp_sis_softc *ssc = sc;
189 int gws;
190
191 /*
192 * The aperture size is equal to 4M<<gws.
193 */
194 gws = (pci_conf_read(ssc->ssc_pc, ssc->ssc_tag,
195 AGP_SIS_WINCTRL)&0x70) >> 4;
196 return ((4 * 1024 * 1024) << gws);
197 }
198
199 int
agp_sis_set_aperture(void * sc,bus_size_t aperture)200 agp_sis_set_aperture(void *sc, bus_size_t aperture)
201 {
202 struct agp_sis_softc *ssc = sc;
203 int gws;
204 pcireg_t reg;
205
206 /*
207 * Check for a power of two and make sure its within the
208 * programmable range.
209 */
210 if (aperture & (aperture - 1)
211 || aperture < 4*1024*1024
212 || aperture > 256*1024*1024)
213 return (EINVAL);
214
215 gws = ffs(aperture / 4*1024*1024) - 1;
216
217 reg = pci_conf_read(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_WINCTRL);
218 reg &= ~0x00000070;
219 reg |= gws << 4;
220 pci_conf_write(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_WINCTRL, reg);
221
222 return (0);
223 }
224
225 void
agp_sis_bind_page(void * sc,bus_addr_t offset,paddr_t physical,int flags)226 agp_sis_bind_page(void *sc, bus_addr_t offset, paddr_t physical, int flags)
227 {
228 struct agp_sis_softc *ssc = sc;
229
230 ssc->gatt->ag_virtual[(offset - ssc->ssc_apaddr) >> AGP_PAGE_SHIFT] =
231 physical;
232 }
233
234 void
agp_sis_unbind_page(void * sc,bus_addr_t offset)235 agp_sis_unbind_page(void *sc, bus_addr_t offset)
236 {
237 struct agp_sis_softc *ssc = sc;
238
239 ssc->gatt->ag_virtual[(offset - ssc->ssc_apaddr) >> AGP_PAGE_SHIFT] = 0;
240 }
241
242 void
agp_sis_flush_tlb(void * sc)243 agp_sis_flush_tlb(void *sc)
244 {
245 struct agp_sis_softc *ssc = sc;
246 pcireg_t reg;
247
248 reg = pci_conf_read(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_TLBFLUSH);
249 reg &= 0xffffff00;
250 reg |= 0x02;
251 pci_conf_write(ssc->ssc_pc, ssc->ssc_tag, AGP_SIS_TLBFLUSH, reg);
252 }
253