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