xref: /freebsd/sys/dev/agp/agp_sis.c (revision 4b9d6057)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
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 
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/malloc.h>
32 #include <sys/kernel.h>
33 #include <sys/module.h>
34 #include <sys/bus.h>
35 #include <sys/lock.h>
36 #include <sys/mutex.h>
37 #include <sys/proc.h>
38 
39 #include <dev/agp/agppriv.h>
40 #include <dev/agp/agpreg.h>
41 #include <dev/pci/pcivar.h>
42 #include <dev/pci/pcireg.h>
43 
44 #include <vm/vm.h>
45 #include <vm/vm_object.h>
46 #include <vm/pmap.h>
47 
48 struct agp_sis_softc {
49 	struct agp_softc agp;
50 	u_int32_t	initial_aperture; /* aperture size at startup */
51 	struct agp_gatt *gatt;
52 };
53 
54 static const char*
55 agp_sis_match(device_t dev)
56 {
57 	if (pci_get_class(dev) != PCIC_BRIDGE
58 	    || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
59 		return NULL;
60 
61 	if (agp_find_caps(dev) == 0)
62 		return NULL;
63 
64 	switch (pci_get_devid(dev)) {
65 	case 0x00011039:
66 		return ("SiS 5591 host to AGP bridge");
67 	case 0x05301039:
68 		return ("SiS 530 host to AGP bridge");
69 	case 0x05401039:
70 		return ("SiS 540 host to AGP bridge");
71 	case 0x05501039:
72 		return ("SiS 550 host to AGP bridge");
73 	case 0x06201039:
74 		return ("SiS 620 host to AGP bridge");
75 	case 0x06301039:
76 		return ("SiS 630 host to AGP bridge");
77 	case 0x06451039:
78 		return ("SiS 645 host to AGP bridge");
79 	case 0x06461039:
80 		return ("SiS 645DX host to AGP bridge");
81 	case 0x06481039:
82 		return ("SiS 648 host to AGP bridge");
83 	case 0x06501039:
84 		return ("SiS 650 host to AGP bridge");
85 	case 0x06511039:
86 		return ("SiS 651 host to AGP bridge");
87 	case 0x06551039:
88 		return ("SiS 655 host to AGP bridge");
89 	case 0x06611039:
90 		return ("SiS 661 host to AGP bridge");
91 	case 0x07301039:
92 		return ("SiS 730 host to AGP bridge");
93 	case 0x07351039:
94 		return ("SiS 735 host to AGP bridge");
95 	case 0x07401039:
96 		return ("SiS 740 host to AGP bridge");
97 	case 0x07411039:
98 		return ("SiS 741 host to AGP bridge");
99 	case 0x07451039:
100 		return ("SiS 745 host to AGP bridge");
101 	case 0x07461039:
102 		return ("SiS 746 host to AGP bridge");
103 	}
104 
105 	return NULL;
106 }
107 
108 static int
109 agp_sis_probe(device_t dev)
110 {
111 	const char *desc;
112 
113 	if (resource_disabled("agp", device_get_unit(dev)))
114 		return (ENXIO);
115 	desc = agp_sis_match(dev);
116 	if (desc) {
117 		device_set_desc(dev, desc);
118 		return BUS_PROBE_DEFAULT;
119 	}
120 
121 	return ENXIO;
122 }
123 
124 static int
125 agp_sis_attach(device_t dev)
126 {
127 	struct agp_sis_softc *sc = device_get_softc(dev);
128 	struct agp_gatt *gatt;
129 	int error;
130 
131 	error = agp_generic_attach(dev);
132 	if (error)
133 		return error;
134 
135 	sc->initial_aperture = AGP_GET_APERTURE(dev);
136 
137 	for (;;) {
138 		gatt = agp_alloc_gatt(dev);
139 		if (gatt)
140 			break;
141 
142 		/*
143 		 * Probably contigmalloc failure. Try reducing the
144 		 * aperture so that the gatt size reduces.
145 		 */
146 		if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
147 			agp_generic_detach(dev);
148 			return ENOMEM;
149 		}
150 	}
151 	sc->gatt = gatt;
152 
153 	/* Install the gatt. */
154 	pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4);
155 
156 	/* Enable the aperture. */
157 	pci_write_config(dev, AGP_SIS_WINCTRL,
158 			 pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1);
159 
160 	/*
161 	 * Enable the TLB and make it automatically invalidate entries
162 	 * when the GATT is written.
163 	 */
164 	pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1);
165 
166 	return 0;
167 }
168 
169 static int
170 agp_sis_detach(device_t dev)
171 {
172 	struct agp_sis_softc *sc = device_get_softc(dev);
173 
174 	agp_free_cdev(dev);
175 
176 	/* Disable the aperture.. */
177 	pci_write_config(dev, AGP_SIS_WINCTRL,
178 			 pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1);
179 
180 	/* and the TLB. */
181 	pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1);
182 
183 	/* Put the aperture back the way it started. */
184 	AGP_SET_APERTURE(dev, sc->initial_aperture);
185 
186 	agp_free_gatt(sc->gatt);
187 	agp_free_res(dev);
188 	return 0;
189 }
190 
191 static u_int32_t
192 agp_sis_get_aperture(device_t dev)
193 {
194 	int gws;
195 
196 	/*
197 	 * The aperture size is equal to 4M<<gws.
198 	 */
199 	gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4;
200 	return (4*1024*1024) << gws;
201 }
202 
203 static int
204 agp_sis_set_aperture(device_t dev, u_int32_t aperture)
205 {
206 	int gws;
207 
208 	/*
209 	 * Check for a power of two and make sure its within the
210 	 * programmable range.
211 	 */
212 	if (aperture & (aperture - 1)
213 	    || aperture < 4*1024*1024
214 	    || aperture > 256*1024*1024)
215 		return EINVAL;
216 
217 	gws = ffs(aperture / 4*1024*1024) - 1;
218 
219 	pci_write_config(dev, AGP_SIS_WINCTRL,
220 			 ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70)
221 			  | gws << 4), 1);
222 
223 	return 0;
224 }
225 
226 static int
227 agp_sis_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
228 {
229 	struct agp_sis_softc *sc = device_get_softc(dev);
230 
231 	if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
232 		return EINVAL;
233 
234 	sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
235 	return 0;
236 }
237 
238 static int
239 agp_sis_unbind_page(device_t dev, vm_offset_t offset)
240 {
241 	struct agp_sis_softc *sc = device_get_softc(dev);
242 
243 	if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
244 		return EINVAL;
245 
246 	sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
247 	return 0;
248 }
249 
250 static void
251 agp_sis_flush_tlb(device_t dev)
252 {
253 	pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1);
254 }
255 
256 static device_method_t agp_sis_methods[] = {
257 	/* Device interface */
258 	DEVMETHOD(device_probe,		agp_sis_probe),
259 	DEVMETHOD(device_attach,	agp_sis_attach),
260 	DEVMETHOD(device_detach,	agp_sis_detach),
261 	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
262 	DEVMETHOD(device_suspend,	bus_generic_suspend),
263 	DEVMETHOD(device_resume,	bus_generic_resume),
264 
265 	/* AGP interface */
266 	DEVMETHOD(agp_get_aperture,	agp_sis_get_aperture),
267 	DEVMETHOD(agp_set_aperture,	agp_sis_set_aperture),
268 	DEVMETHOD(agp_bind_page,	agp_sis_bind_page),
269 	DEVMETHOD(agp_unbind_page,	agp_sis_unbind_page),
270 	DEVMETHOD(agp_flush_tlb,	agp_sis_flush_tlb),
271 	DEVMETHOD(agp_enable,		agp_generic_enable),
272 	DEVMETHOD(agp_alloc_memory,	agp_generic_alloc_memory),
273 	DEVMETHOD(agp_free_memory,	agp_generic_free_memory),
274 	DEVMETHOD(agp_bind_memory,	agp_generic_bind_memory),
275 	DEVMETHOD(agp_unbind_memory,	agp_generic_unbind_memory),
276 	{ 0, 0 }
277 };
278 
279 static driver_t agp_sis_driver = {
280 	"agp",
281 	agp_sis_methods,
282 	sizeof(struct agp_sis_softc),
283 };
284 
285 DRIVER_MODULE(agp_sis, hostb, agp_sis_driver, 0, 0);
286 MODULE_DEPEND(agp_sis, agp, 1, 1, 1);
287 MODULE_DEPEND(agp_sis, pci, 1, 1, 1);
288