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 1.20 2006/05/30 18:41:26 jkim Exp $ 27 * $DragonFly: src/sys/dev/agp/agp_sis.c,v 1.6 2007/09/12 08:31:43 hasso Exp $ 28 */ 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/bus.h> 37 #include <sys/lock.h> 38 39 #include <bus/pci/pcivar.h> 40 #include <bus/pci/pcireg.h> 41 #include "agppriv.h" 42 #include "agpreg.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_verbose(dev); 118 device_set_desc(dev, desc); 119 return BUS_PROBE_DEFAULT; 120 } 121 122 return ENXIO; 123 } 124 125 static int 126 agp_sis_attach(device_t dev) 127 { 128 struct agp_sis_softc *sc = device_get_softc(dev); 129 struct agp_gatt *gatt; 130 int error; 131 132 error = agp_generic_attach(dev); 133 if (error) 134 return error; 135 136 sc->initial_aperture = AGP_GET_APERTURE(dev); 137 138 for (;;) { 139 gatt = agp_alloc_gatt(dev); 140 if (gatt) 141 break; 142 143 /* 144 * Probably contigmalloc failure. Try reducing the 145 * aperture so that the gatt size reduces. 146 */ 147 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 148 agp_generic_detach(dev); 149 return ENOMEM; 150 } 151 } 152 sc->gatt = gatt; 153 154 /* Install the gatt. */ 155 pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4); 156 157 /* Enable the aperture. */ 158 pci_write_config(dev, AGP_SIS_WINCTRL, 159 pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1); 160 161 /* 162 * Enable the TLB and make it automatically invalidate entries 163 * when the GATT is written. 164 */ 165 pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1); 166 167 return 0; 168 } 169 170 static int 171 agp_sis_detach(device_t dev) 172 { 173 struct agp_sis_softc *sc = device_get_softc(dev); 174 int error; 175 176 error = agp_generic_detach(dev); 177 if (error) 178 return error; 179 180 /* Disable the aperture.. */ 181 pci_write_config(dev, AGP_SIS_WINCTRL, 182 pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1); 183 184 /* and the TLB. */ 185 pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1); 186 187 /* Put the aperture back the way it started. */ 188 AGP_SET_APERTURE(dev, sc->initial_aperture); 189 190 agp_free_gatt(sc->gatt); 191 return 0; 192 } 193 194 static u_int32_t 195 agp_sis_get_aperture(device_t dev) 196 { 197 int gws; 198 199 /* 200 * The aperture size is equal to 4M<<gws. 201 */ 202 gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4; 203 return (4*1024*1024) << gws; 204 } 205 206 static int 207 agp_sis_set_aperture(device_t dev, u_int32_t aperture) 208 { 209 int gws; 210 211 /* 212 * Check for a power of two and make sure its within the 213 * programmable range. 214 */ 215 if (aperture & (aperture - 1) 216 || aperture < 4*1024*1024 217 || aperture > 256*1024*1024) 218 return EINVAL; 219 220 gws = ffs(aperture / 4*1024*1024) - 1; 221 222 pci_write_config(dev, AGP_SIS_WINCTRL, 223 ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70) 224 | gws << 4), 1); 225 226 return 0; 227 } 228 229 static int 230 agp_sis_bind_page(device_t dev, int offset, vm_offset_t physical) 231 { 232 struct agp_sis_softc *sc = device_get_softc(dev); 233 234 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 235 return EINVAL; 236 237 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 238 return 0; 239 } 240 241 static int 242 agp_sis_unbind_page(device_t dev, int offset) 243 { 244 struct agp_sis_softc *sc = device_get_softc(dev); 245 246 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 247 return EINVAL; 248 249 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 250 return 0; 251 } 252 253 static void 254 agp_sis_flush_tlb(device_t dev) 255 { 256 pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1); 257 } 258 259 static device_method_t agp_sis_methods[] = { 260 /* Device interface */ 261 DEVMETHOD(device_probe, agp_sis_probe), 262 DEVMETHOD(device_attach, agp_sis_attach), 263 DEVMETHOD(device_detach, agp_sis_detach), 264 DEVMETHOD(device_shutdown, bus_generic_shutdown), 265 DEVMETHOD(device_suspend, bus_generic_suspend), 266 DEVMETHOD(device_resume, bus_generic_resume), 267 268 /* AGP interface */ 269 DEVMETHOD(agp_get_aperture, agp_sis_get_aperture), 270 DEVMETHOD(agp_set_aperture, agp_sis_set_aperture), 271 DEVMETHOD(agp_bind_page, agp_sis_bind_page), 272 DEVMETHOD(agp_unbind_page, agp_sis_unbind_page), 273 DEVMETHOD(agp_flush_tlb, agp_sis_flush_tlb), 274 DEVMETHOD(agp_enable, agp_generic_enable), 275 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 276 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 277 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 278 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 279 280 { 0, 0 } 281 }; 282 283 static driver_t agp_sis_driver = { 284 "agp", 285 agp_sis_methods, 286 sizeof(struct agp_sis_softc), 287 }; 288 289 static devclass_t agp_devclass; 290 291 DRIVER_MODULE(agp_sis, pci, agp_sis_driver, agp_devclass, 0, 0); 292 MODULE_DEPEND(agp_sis, agp, 1, 1, 1); 293 MODULE_DEPEND(agp_sis, pci, 1, 1, 1); 294