1 /*- 2 * Copyright (c) 2000 Doug Rabson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/sys/pci/agp_sis.c,v 1.1.2.1 2000/07/19 09:48:04 ru Exp $ 27 * $DragonFly: src/sys/dev/agp/agp_sis.c,v 1.5 2004/07/04 00:24:52 dillon Exp $ 28 */ 29 30 #include "opt_bus.h" 31 #include "opt_pci.h" 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/malloc.h> 36 #include <sys/kernel.h> 37 #include <sys/bus.h> 38 #include <sys/lock.h> 39 40 #include <bus/pci/pcivar.h> 41 #include <bus/pci/pcireg.h> 42 #include "agppriv.h" 43 #include "agpreg.h" 44 45 #include <vm/vm.h> 46 #include <vm/vm_object.h> 47 #include <vm/pmap.h> 48 49 struct agp_sis_softc { 50 struct agp_softc agp; 51 u_int32_t initial_aperture; /* aperture size at startup */ 52 struct agp_gatt *gatt; 53 }; 54 55 static const char* 56 agp_sis_match(device_t dev) 57 { 58 if (pci_get_class(dev) != PCIC_BRIDGE 59 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 60 return NULL; 61 62 if (agp_find_caps(dev) == 0) 63 return NULL; 64 65 switch (pci_get_devid(dev)) { 66 case 0x00011039: 67 return ("SiS 5591 host to AGP bridge"); 68 case 0x05301039: 69 return ("SiS 530 host to AGP bridge"); 70 case 0x05401039: 71 return ("SiS 540 host to AGP bridge"); 72 case 0x05501039: 73 return ("SiS 550 host to AGP bridge"); 74 case 0x06201039: 75 return ("SiS 620 host to AGP bridge"); 76 case 0x06301039: 77 return ("SiS 630 host to AGP bridge"); 78 case 0x06451039: 79 return ("SiS 645 host to AGP bridge"); 80 case 0x06461039: 81 return ("SiS 645DX host to AGP bridge"); 82 case 0x06481039: 83 return ("SiS 648 host to AGP bridge"); 84 case 0x06501039: 85 return ("SiS 650 host to AGP bridge"); 86 case 0x06511039: 87 return ("SiS 651 host to AGP bridge"); 88 case 0x06551039: 89 return ("SiS 655 host to AGP bridge"); 90 case 0x06611039: 91 return ("SiS 661 host to AGP bridge"); 92 case 0x07301039: 93 return ("SiS 730 host to AGP bridge"); 94 case 0x07351039: 95 return ("SiS 735 host to AGP bridge"); 96 case 0x07401039: 97 return ("SiS 740 host to AGP bridge"); 98 case 0x07411039: 99 return ("SiS 741 host to AGP bridge"); 100 case 0x07451039: 101 return ("SiS 745 host to AGP bridge"); 102 case 0x07461039: 103 return ("SiS 746 host to AGP bridge"); 104 case 0x07601039: 105 return ("SiS 760 host to AGP bridge"); 106 }; 107 108 if (pci_get_vendor(dev) == 0x1039) 109 return ("SIS Generic host to PCI bridge"); 110 111 return NULL; 112 } 113 114 static int 115 agp_sis_probe(device_t dev) 116 { 117 const char *desc; 118 119 desc = agp_sis_match(dev); 120 if (desc) { 121 device_verbose(dev); 122 device_set_desc(dev, desc); 123 return 0; 124 } 125 126 return ENXIO; 127 } 128 129 static int 130 agp_sis_attach(device_t dev) 131 { 132 struct agp_sis_softc *sc = device_get_softc(dev); 133 struct agp_gatt *gatt; 134 int error; 135 136 error = agp_generic_attach(dev); 137 if (error) 138 return error; 139 140 sc->initial_aperture = AGP_GET_APERTURE(dev); 141 142 for (;;) { 143 gatt = agp_alloc_gatt(dev); 144 if (gatt) 145 break; 146 147 /* 148 * Probably contigmalloc failure. Try reducing the 149 * aperture so that the gatt size reduces. 150 */ 151 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 152 agp_generic_detach(dev); 153 return ENOMEM; 154 } 155 } 156 sc->gatt = gatt; 157 158 /* Install the gatt. */ 159 pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4); 160 161 /* Enable the aperture. */ 162 pci_write_config(dev, AGP_SIS_WINCTRL, 163 pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1); 164 165 /* 166 * Enable the TLB and make it automatically invalidate entries 167 * when the GATT is written. 168 */ 169 pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1); 170 171 return 0; 172 } 173 174 static int 175 agp_sis_detach(device_t dev) 176 { 177 struct agp_sis_softc *sc = device_get_softc(dev); 178 int error; 179 180 error = agp_generic_detach(dev); 181 if (error) 182 return error; 183 184 /* Disable the aperture.. */ 185 pci_write_config(dev, AGP_SIS_WINCTRL, 186 pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1); 187 188 /* and the TLB. */ 189 pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1); 190 191 /* Put the aperture back the way it started. */ 192 AGP_SET_APERTURE(dev, sc->initial_aperture); 193 194 agp_free_gatt(sc->gatt); 195 return 0; 196 } 197 198 static u_int32_t 199 agp_sis_get_aperture(device_t dev) 200 { 201 int gws; 202 203 /* 204 * The aperture size is equal to 4M<<gws. 205 */ 206 gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4; 207 return (4*1024*1024) << gws; 208 } 209 210 static int 211 agp_sis_set_aperture(device_t dev, u_int32_t aperture) 212 { 213 int gws; 214 215 /* 216 * Check for a power of two and make sure its within the 217 * programmable range. 218 */ 219 if (aperture & (aperture - 1) 220 || aperture < 4*1024*1024 221 || aperture > 256*1024*1024) 222 return EINVAL; 223 224 gws = ffs(aperture / 4*1024*1024) - 1; 225 226 pci_write_config(dev, AGP_SIS_WINCTRL, 227 ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70) 228 | gws << 4), 1); 229 230 return 0; 231 } 232 233 static int 234 agp_sis_bind_page(device_t dev, int offset, vm_offset_t physical) 235 { 236 struct agp_sis_softc *sc = device_get_softc(dev); 237 238 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 239 return EINVAL; 240 241 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 242 return 0; 243 } 244 245 static int 246 agp_sis_unbind_page(device_t dev, int offset) 247 { 248 struct agp_sis_softc *sc = device_get_softc(dev); 249 250 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 251 return EINVAL; 252 253 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 254 return 0; 255 } 256 257 static void 258 agp_sis_flush_tlb(device_t dev) 259 { 260 pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1); 261 } 262 263 static device_method_t agp_sis_methods[] = { 264 /* Device interface */ 265 DEVMETHOD(device_probe, agp_sis_probe), 266 DEVMETHOD(device_attach, agp_sis_attach), 267 DEVMETHOD(device_detach, agp_sis_detach), 268 DEVMETHOD(device_shutdown, bus_generic_shutdown), 269 DEVMETHOD(device_suspend, bus_generic_suspend), 270 DEVMETHOD(device_resume, bus_generic_resume), 271 272 /* AGP interface */ 273 DEVMETHOD(agp_get_aperture, agp_sis_get_aperture), 274 DEVMETHOD(agp_set_aperture, agp_sis_set_aperture), 275 DEVMETHOD(agp_bind_page, agp_sis_bind_page), 276 DEVMETHOD(agp_unbind_page, agp_sis_unbind_page), 277 DEVMETHOD(agp_flush_tlb, agp_sis_flush_tlb), 278 DEVMETHOD(agp_enable, agp_generic_enable), 279 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 280 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 281 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 282 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 283 284 { 0, 0 } 285 }; 286 287 static driver_t agp_sis_driver = { 288 "agp", 289 agp_sis_methods, 290 sizeof(struct agp_sis_softc), 291 }; 292 293 static devclass_t agp_devclass; 294 295 DRIVER_MODULE(agp_sis, pci, agp_sis_driver, agp_devclass, 0, 0); 296 MODULE_DEPEND(agp_sis, agp, 1, 1, 1); 297 MODULE_DEPEND(agp_sis, pci, 1, 1, 1); 298