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_via.c,v 1.23 2005/12/20 21:12:26 jhb Exp $ 27 * $DragonFly: src/sys/dev/agp/agp_via.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 #define REG_GARTCTRL 0 49 #define REG_APSIZE 1 50 #define REG_ATTBASE 2 51 52 struct agp_via_softc { 53 struct agp_softc agp; 54 u_int32_t initial_aperture; /* aperture size at startup */ 55 struct agp_gatt *gatt; 56 int *regs; 57 }; 58 59 static int via_v2_regs[] = { AGP_VIA_GARTCTRL, AGP_VIA_APSIZE, 60 AGP_VIA_ATTBASE }; 61 static int via_v3_regs[] = { AGP3_VIA_GARTCTRL, AGP3_VIA_APSIZE, 62 AGP3_VIA_ATTBASE }; 63 64 static const char* 65 agp_via_match(device_t dev) 66 { 67 if (pci_get_class(dev) != PCIC_BRIDGE 68 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 69 return NULL; 70 71 if (agp_find_caps(dev) == 0) 72 return NULL; 73 74 switch (pci_get_devid(dev)) { 75 case 0x01981106: 76 return ("VIA 8763 (P4X600) host to PCI bridge"); 77 case 0x02591106: 78 return ("VIA PM800/PN800/PM880/PN880 host to PCI bridge"); 79 case 0x02691106: 80 return ("VIA KT880 host to PCI bridge"); 81 case 0x02961106: 82 return ("VIA 3296 (P4M800) host to PCI bridge"); 83 case 0x03051106: 84 return ("VIA 82C8363 (Apollo KT133x/KM133) host to PCI bridge"); 85 case 0x03911106: 86 return ("VIA 8371 (Apollo KX133) host to PCI bridge"); 87 case 0x05011106: 88 return ("VIA 8501 (Apollo MVP4) host to PCI bridge"); 89 case 0x05971106: 90 return ("VIA 82C597 (Apollo VP3) host to PCI bridge"); 91 case 0x05981106: 92 return ("VIA 82C598 (Apollo MVP3) host to PCI bridge"); 93 case 0x06011106: 94 return ("VIA 8601 (Apollo ProMedia/PLE133Ta) host to PCI bridge"); 95 case 0x06051106: 96 return ("VIA 82C694X (Apollo Pro 133A) host to PCI bridge"); 97 case 0x06911106: 98 return ("VIA 82C691 (Apollo Pro) host to PCI bridge"); 99 case 0x30911106: 100 return ("VIA 8633 (Pro 266) host to PCI bridge"); 101 case 0x30991106: 102 return ("VIA 8367 (KT266/KY266x/KT333) host to PCI bridge"); 103 case 0x31011106: 104 return ("VIA 8653 (Pro266T) host to PCI bridge"); 105 case 0x31121106: 106 return ("VIA 8361 (KLE133) host to PCI bridge"); 107 case 0x31161106: 108 return ("VIA XM266 (PM266/KM266) host to PCI bridge"); 109 case 0x31231106: 110 return ("VIA 862x (CLE266) host to PCI bridge"); 111 case 0x31281106: 112 return ("VIA 8753 (P4X266) host to PCI bridge"); 113 case 0x31481106: 114 return ("VIA 8703 (P4M266x/P4N266) host to PCI bridge"); 115 case 0x31561106: 116 return ("VIA XN266 (Apollo Pro266) host to PCI bridge"); 117 case 0x31681106: 118 return ("VIA 8754 (PT800) host to PCI bridge"); 119 case 0x31891106: 120 return ("VIA 8377 (Apollo KT400/KT400A/KT600) host to PCI bridge"); 121 case 0x32051106: 122 return ("VIA 8235/8237 (Apollo KM400/KM400A) host to PCI bridge"); 123 case 0x32081106: 124 return ("VIA 8783 (PT890) host to PCI bridge"); 125 case 0x32581106: 126 return ("VIA PT880 host to PCI bridge"); 127 case 0xb1981106: 128 return ("VIA VT83xx/VT87xx/KTxxx/Px8xx host to PCI bridge"); 129 }; 130 131 return NULL; 132 } 133 134 static int 135 agp_via_probe(device_t dev) 136 { 137 const char *desc; 138 139 if (resource_disabled("agp", device_get_unit(dev))) 140 return (ENXIO); 141 desc = agp_via_match(dev); 142 if (desc) { 143 device_verbose(dev); 144 device_set_desc(dev, desc); 145 return BUS_PROBE_DEFAULT; 146 } 147 148 return ENXIO; 149 } 150 151 static int 152 agp_via_attach(device_t dev) 153 { 154 struct agp_via_softc *sc = device_get_softc(dev); 155 struct agp_gatt *gatt; 156 int error; 157 u_int32_t agpsel; 158 159 /* XXX: This should be keying off of whether the bridge is AGP3 capable, 160 * rather than a bunch of device ids for chipsets that happen to do 8x. 161 */ 162 switch (pci_get_devid(dev)) { 163 case 0x01981106: 164 case 0x02591106: 165 case 0x02691106: 166 case 0x02961106: 167 case 0x31231106: 168 case 0x31681106: 169 case 0x31891106: 170 case 0x32051106: 171 case 0x32581106: 172 case 0xb1981106: 173 /* The newer VIA chipsets will select the AGP version based on 174 * what AGP versions the card supports. We still have to 175 * program it using the v2 registers if it has chosen to use 176 * compatibility mode. 177 */ 178 agpsel = pci_read_config(dev, AGP_VIA_AGPSEL, 1); 179 if ((agpsel & (1 << 1)) == 0) 180 sc->regs = via_v3_regs; 181 else 182 sc->regs = via_v2_regs; 183 break; 184 default: 185 sc->regs = via_v2_regs; 186 break; 187 } 188 189 error = agp_generic_attach(dev); 190 if (error) 191 return error; 192 193 sc->initial_aperture = AGP_GET_APERTURE(dev); 194 if (sc->initial_aperture == 0) { 195 device_printf(dev, "bad initial aperture size, disabling\n"); 196 return ENXIO; 197 } 198 199 for (;;) { 200 gatt = agp_alloc_gatt(dev); 201 if (gatt) 202 break; 203 204 /* 205 * Probably contigmalloc failure. Try reducing the 206 * aperture so that the gatt size reduces. 207 */ 208 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 209 agp_generic_detach(dev); 210 return ENOMEM; 211 } 212 } 213 sc->gatt = gatt; 214 215 if (sc->regs == via_v2_regs) { 216 /* Install the gatt. */ 217 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical | 3, 4); 218 219 /* Enable the aperture. */ 220 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); 221 } else { 222 u_int32_t gartctrl; 223 224 /* Install the gatt. */ 225 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical, 4); 226 227 /* Enable the aperture. */ 228 gartctrl = pci_read_config(dev, sc->regs[REG_ATTBASE], 4); 229 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl | (3 << 7), 4); 230 } 231 232 return 0; 233 } 234 235 static int 236 agp_via_detach(device_t dev) 237 { 238 struct agp_via_softc *sc = device_get_softc(dev); 239 int error; 240 241 error = agp_generic_detach(dev); 242 if (error) 243 return error; 244 245 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0, 4); 246 pci_write_config(dev, sc->regs[REG_ATTBASE], 0, 4); 247 AGP_SET_APERTURE(dev, sc->initial_aperture); 248 agp_free_gatt(sc->gatt); 249 250 return 0; 251 } 252 253 static u_int32_t 254 agp_via_get_aperture(device_t dev) 255 { 256 struct agp_via_softc *sc = device_get_softc(dev); 257 u_int32_t apsize; 258 259 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 1) & 0x1f; 260 261 /* 262 * The size is determined by the number of low bits of 263 * register APBASE which are forced to zero. The low 20 bits 264 * are always forced to zero and each zero bit in the apsize 265 * field just read forces the corresponding bit in the 27:20 266 * to be zero. We calculate the aperture size accordingly. 267 */ 268 return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1; 269 } 270 271 static int 272 agp_via_set_aperture(device_t dev, u_int32_t aperture) 273 { 274 struct agp_via_softc *sc = device_get_softc(dev); 275 u_int32_t apsize; 276 277 /* 278 * Reverse the magic from get_aperture. 279 */ 280 apsize = ((aperture - 1) >> 20) ^ 0xff; 281 282 /* 283 * Double check for sanity. 284 */ 285 if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture) 286 return EINVAL; 287 288 pci_write_config(dev, sc->regs[REG_APSIZE], apsize, 1); 289 290 return 0; 291 } 292 293 static int 294 agp_via_bind_page(device_t dev, int offset, vm_offset_t physical) 295 { 296 struct agp_via_softc *sc = device_get_softc(dev); 297 298 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 299 return EINVAL; 300 301 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 302 return 0; 303 } 304 305 static int 306 agp_via_unbind_page(device_t dev, int offset) 307 { 308 struct agp_via_softc *sc = device_get_softc(dev); 309 310 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 311 return EINVAL; 312 313 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 314 return 0; 315 } 316 317 static void 318 agp_via_flush_tlb(device_t dev) 319 { 320 struct agp_via_softc *sc = device_get_softc(dev); 321 u_int32_t gartctrl; 322 323 if (sc->regs == via_v2_regs) { 324 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x8f, 4); 325 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); 326 } else { 327 gartctrl = pci_read_config(dev, sc->regs[REG_GARTCTRL], 4); 328 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl & 329 ~(1 << 7), 4); 330 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl, 4); 331 } 332 333 } 334 335 static device_method_t agp_via_methods[] = { 336 /* Device interface */ 337 DEVMETHOD(device_probe, agp_via_probe), 338 DEVMETHOD(device_attach, agp_via_attach), 339 DEVMETHOD(device_detach, agp_via_detach), 340 DEVMETHOD(device_shutdown, bus_generic_shutdown), 341 DEVMETHOD(device_suspend, bus_generic_suspend), 342 DEVMETHOD(device_resume, bus_generic_resume), 343 344 /* AGP interface */ 345 DEVMETHOD(agp_get_aperture, agp_via_get_aperture), 346 DEVMETHOD(agp_set_aperture, agp_via_set_aperture), 347 DEVMETHOD(agp_bind_page, agp_via_bind_page), 348 DEVMETHOD(agp_unbind_page, agp_via_unbind_page), 349 DEVMETHOD(agp_flush_tlb, agp_via_flush_tlb), 350 DEVMETHOD(agp_enable, agp_generic_enable), 351 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 352 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 353 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 354 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 355 356 { 0, 0 } 357 }; 358 359 static driver_t agp_via_driver = { 360 "agp", 361 agp_via_methods, 362 sizeof(struct agp_via_softc), 363 }; 364 365 static devclass_t agp_devclass; 366 367 DRIVER_MODULE(agp_via, pci, agp_via_driver, agp_devclass, 0, 0); 368 MODULE_DEPEND(agp_via, agp, 1, 1, 1); 369 MODULE_DEPEND(agp_via, pci, 1, 1, 1); 370