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 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include "opt_bus.h" 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/malloc.h> 35 #include <sys/kernel.h> 36 #include <sys/module.h> 37 #include <sys/bus.h> 38 #include <sys/lock.h> 39 #include <sys/mutex.h> 40 #include <sys/proc.h> 41 42 #include <dev/pci/pcivar.h> 43 #include <dev/pci/pcireg.h> 44 #include <pci/agppriv.h> 45 #include <pci/agpreg.h> 46 47 #include <vm/vm.h> 48 #include <vm/vm_object.h> 49 #include <vm/pmap.h> 50 51 struct agp_sis_softc { 52 struct agp_softc agp; 53 u_int32_t initial_aperture; /* aperture size at startup */ 54 struct agp_gatt *gatt; 55 }; 56 57 static const char* 58 agp_sis_match(device_t dev) 59 { 60 if (pci_get_class(dev) != PCIC_BRIDGE 61 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 62 return NULL; 63 64 if (agp_find_caps(dev) == 0) 65 return NULL; 66 67 switch (pci_get_devid(dev)) { 68 case 0x00011039: 69 return ("SiS 5591 host to AGP bridge"); 70 case 0x05301039: 71 return ("SiS 530 host to AGP bridge"); 72 case 0x05401039: 73 return ("SiS 540 host to AGP bridge"); 74 case 0x05501039: 75 return ("SiS 550 host to AGP bridge"); 76 case 0x06201039: 77 return ("SiS 620 host to AGP bridge"); 78 case 0x06301039: 79 return ("SiS 630 host to AGP bridge"); 80 case 0x06451039: 81 return ("SiS 645 host to AGP bridge"); 82 case 0x06461039: 83 return ("SiS 645DX host to AGP bridge"); 84 case 0x06481039: 85 return ("SiS 648 host to AGP bridge"); 86 case 0x06501039: 87 return ("SiS 650 host to AGP bridge"); 88 case 0x06511039: 89 return ("SiS 651 host to AGP bridge"); 90 case 0x06551039: 91 return ("SiS 655 host to AGP bridge"); 92 case 0x06611039: 93 return ("SiS 661 host to AGP bridge"); 94 case 0x07301039: 95 return ("SiS 730 host to AGP bridge"); 96 case 0x07351039: 97 return ("SiS 735 host to AGP bridge"); 98 case 0x07401039: 99 return ("SiS 740 host to AGP bridge"); 100 case 0x07411039: 101 return ("SiS 741 host to AGP bridge"); 102 case 0x07451039: 103 return ("SiS 745 host to AGP bridge"); 104 case 0x07461039: 105 return ("SiS 746 host to AGP bridge"); 106 case 0x07601039: 107 return ("SiS 760 host to AGP bridge"); 108 }; 109 110 return NULL; 111 } 112 113 static int 114 agp_sis_probe(device_t dev) 115 { 116 const char *desc; 117 118 if (resource_disabled("agp", device_get_unit(dev))) 119 return (ENXIO); 120 desc = agp_sis_match(dev); 121 if (desc) { 122 device_verbose(dev); 123 device_set_desc(dev, desc); 124 return 0; 125 } 126 127 return ENXIO; 128 } 129 130 static int 131 agp_sis_attach(device_t dev) 132 { 133 struct agp_sis_softc *sc = device_get_softc(dev); 134 struct agp_gatt *gatt; 135 int error; 136 137 error = agp_generic_attach(dev); 138 if (error) 139 return error; 140 141 sc->initial_aperture = AGP_GET_APERTURE(dev); 142 143 for (;;) { 144 gatt = agp_alloc_gatt(dev); 145 if (gatt) 146 break; 147 148 /* 149 * Probably contigmalloc failure. Try reducing the 150 * aperture so that the gatt size reduces. 151 */ 152 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 153 agp_generic_detach(dev); 154 return ENOMEM; 155 } 156 } 157 sc->gatt = gatt; 158 159 /* Install the gatt. */ 160 pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4); 161 162 /* Enable the aperture. */ 163 pci_write_config(dev, AGP_SIS_WINCTRL, 164 pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1); 165 166 /* 167 * Enable the TLB and make it automatically invalidate entries 168 * when the GATT is written. 169 */ 170 pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1); 171 172 return 0; 173 } 174 175 static int 176 agp_sis_detach(device_t dev) 177 { 178 struct agp_sis_softc *sc = device_get_softc(dev); 179 int error; 180 181 error = agp_generic_detach(dev); 182 if (error) 183 return error; 184 185 /* Disable the aperture.. */ 186 pci_write_config(dev, AGP_SIS_WINCTRL, 187 pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1); 188 189 /* and the TLB. */ 190 pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1); 191 192 /* Put the aperture back the way it started. */ 193 AGP_SET_APERTURE(dev, sc->initial_aperture); 194 195 agp_free_gatt(sc->gatt); 196 return 0; 197 } 198 199 static u_int32_t 200 agp_sis_get_aperture(device_t dev) 201 { 202 int gws; 203 204 /* 205 * The aperture size is equal to 4M<<gws. 206 */ 207 gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4; 208 return (4*1024*1024) << gws; 209 } 210 211 static int 212 agp_sis_set_aperture(device_t dev, u_int32_t aperture) 213 { 214 int gws; 215 216 /* 217 * Check for a power of two and make sure its within the 218 * programmable range. 219 */ 220 if (aperture & (aperture - 1) 221 || aperture < 4*1024*1024 222 || aperture > 256*1024*1024) 223 return EINVAL; 224 225 gws = ffs(aperture / 4*1024*1024) - 1; 226 227 pci_write_config(dev, AGP_SIS_WINCTRL, 228 ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70) 229 | gws << 4), 1); 230 231 return 0; 232 } 233 234 static int 235 agp_sis_bind_page(device_t dev, int offset, vm_offset_t physical) 236 { 237 struct agp_sis_softc *sc = device_get_softc(dev); 238 239 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 240 return EINVAL; 241 242 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 243 return 0; 244 } 245 246 static int 247 agp_sis_unbind_page(device_t dev, int offset) 248 { 249 struct agp_sis_softc *sc = device_get_softc(dev); 250 251 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 252 return EINVAL; 253 254 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 255 return 0; 256 } 257 258 static void 259 agp_sis_flush_tlb(device_t dev) 260 { 261 pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1); 262 } 263 264 static device_method_t agp_sis_methods[] = { 265 /* Device interface */ 266 DEVMETHOD(device_probe, agp_sis_probe), 267 DEVMETHOD(device_attach, agp_sis_attach), 268 DEVMETHOD(device_detach, agp_sis_detach), 269 DEVMETHOD(device_shutdown, bus_generic_shutdown), 270 DEVMETHOD(device_suspend, bus_generic_suspend), 271 DEVMETHOD(device_resume, bus_generic_resume), 272 273 /* AGP interface */ 274 DEVMETHOD(agp_get_aperture, agp_sis_get_aperture), 275 DEVMETHOD(agp_set_aperture, agp_sis_set_aperture), 276 DEVMETHOD(agp_bind_page, agp_sis_bind_page), 277 DEVMETHOD(agp_unbind_page, agp_sis_unbind_page), 278 DEVMETHOD(agp_flush_tlb, agp_sis_flush_tlb), 279 DEVMETHOD(agp_enable, agp_generic_enable), 280 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 281 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 282 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 283 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 284 285 { 0, 0 } 286 }; 287 288 static driver_t agp_sis_driver = { 289 "agp", 290 agp_sis_methods, 291 sizeof(struct agp_sis_softc), 292 }; 293 294 static devclass_t agp_devclass; 295 296 DRIVER_MODULE(agp_sis, pci, agp_sis_driver, agp_devclass, 0, 0); 297 MODULE_DEPEND(agp_sis, agp, 1, 1, 1); 298 MODULE_DEPEND(agp_sis, pci, 1, 1, 1); 299