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/dev/agp/agp_via.c,v 1.26 2007/11/12 21:51:37 jhb Exp $ 27 */ 28 29 #include "opt_bus.h" 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/malloc.h> 34 #include <sys/kernel.h> 35 #include <sys/bus.h> 36 #include <sys/lock.h> 37 38 #include <bus/pci/pcivar.h> 39 #include <bus/pci/pcireg.h> 40 #include "agppriv.h" 41 #include "agpreg.h" 42 43 #include <vm/vm.h> 44 #include <vm/vm_object.h> 45 #include <vm/pmap.h> 46 47 #define REG_GARTCTRL 0 48 #define REG_APSIZE 1 49 #define REG_ATTBASE 2 50 51 struct agp_via_softc { 52 struct agp_softc agp; 53 u_int32_t initial_aperture; /* aperture size at startup */ 54 struct agp_gatt *gatt; 55 int *regs; 56 }; 57 58 static int via_v2_regs[] = { AGP_VIA_GARTCTRL, AGP_VIA_APSIZE, 59 AGP_VIA_ATTBASE }; 60 static int via_v3_regs[] = { AGP3_VIA_GARTCTRL, AGP3_VIA_APSIZE, 61 AGP3_VIA_ATTBASE }; 62 63 static const char* 64 agp_via_match(device_t dev) 65 { 66 if (pci_get_class(dev) != PCIC_BRIDGE 67 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 68 return NULL; 69 70 if (agp_find_caps(dev) == 0) 71 return NULL; 72 73 switch (pci_get_devid(dev)) { 74 case 0x01981106: 75 return ("VIA 8763 (P4X600) host to PCI bridge"); 76 case 0x02591106: 77 return ("VIA PM800/PN800/PM880/PN880 host to PCI bridge"); 78 case 0x02691106: 79 return ("VIA KT880 host to PCI bridge"); 80 case 0x02961106: 81 return ("VIA 3296 (P4M800) host to PCI bridge"); 82 case 0x03051106: 83 return ("VIA 82C8363 (Apollo KT133x/KM133) host to PCI bridge"); 84 case 0x03911106: 85 return ("VIA 8371 (Apollo KX133) host to PCI bridge"); 86 case 0x05011106: 87 return ("VIA 8501 (Apollo MVP4) host to PCI bridge"); 88 case 0x05971106: 89 return ("VIA 82C597 (Apollo VP3) host to PCI bridge"); 90 case 0x05981106: 91 return ("VIA 82C598 (Apollo MVP3) host to PCI bridge"); 92 case 0x06011106: 93 return ("VIA 8601 (Apollo ProMedia/PLE133Ta) host to PCI bridge"); 94 case 0x06051106: 95 return ("VIA 82C694X (Apollo Pro 133A) host to PCI bridge"); 96 case 0x06911106: 97 return ("VIA 82C691 (Apollo Pro) host to PCI bridge"); 98 case 0x30911106: 99 return ("VIA 8633 (Pro 266) host to PCI bridge"); 100 case 0x30991106: 101 return ("VIA 8367 (KT266/KY266x/KT333) host to PCI bridge"); 102 case 0x31011106: 103 return ("VIA 8653 (Pro266T) host to PCI bridge"); 104 case 0x31121106: 105 return ("VIA 8361 (KLE133) host to PCI bridge"); 106 case 0x31161106: 107 return ("VIA XM266 (PM266/KM266) host to PCI bridge"); 108 case 0x31231106: 109 return ("VIA 862x (CLE266) host to PCI bridge"); 110 case 0x31281106: 111 return ("VIA 8753 (P4X266) host to PCI bridge"); 112 case 0x31481106: 113 return ("VIA 8703 (P4M266x/P4N266) host to PCI bridge"); 114 case 0x31561106: 115 return ("VIA XN266 (Apollo Pro266) host to PCI bridge"); 116 case 0x31681106: 117 return ("VIA 8754 (PT800) host to PCI bridge"); 118 case 0x31891106: 119 return ("VIA 8377 (Apollo KT400/KT400A/KT600) host to PCI bridge"); 120 case 0x32051106: 121 return ("VIA 8235/8237 (Apollo KM400/KM400A) host to PCI bridge"); 122 case 0x32081106: 123 return ("VIA 8783 (PT890) host to PCI bridge"); 124 case 0x32581106: 125 return ("VIA PT880 host to PCI bridge"); 126 case 0xb1981106: 127 return ("VIA VT83xx/VT87xx/KTxxx/Px8xx host to PCI bridge"); 128 }; 129 130 return NULL; 131 } 132 133 static int 134 agp_via_probe(device_t dev) 135 { 136 const char *desc; 137 138 if (resource_disabled("agp", device_get_unit(dev))) 139 return (ENXIO); 140 desc = agp_via_match(dev); 141 if (desc) { 142 device_verbose(dev); 143 device_set_desc(dev, desc); 144 return BUS_PROBE_DEFAULT; 145 } 146 147 return ENXIO; 148 } 149 150 static int 151 agp_via_attach(device_t dev) 152 { 153 struct agp_via_softc *sc = device_get_softc(dev); 154 struct agp_gatt *gatt; 155 int error; 156 u_int32_t agpsel; 157 158 /* XXX: This should be keying off of whether the bridge is AGP3 capable, 159 * rather than a bunch of device ids for chipsets that happen to do 8x. 160 */ 161 switch (pci_get_devid(dev)) { 162 case 0x01981106: 163 case 0x02591106: 164 case 0x02691106: 165 case 0x02961106: 166 case 0x31231106: 167 case 0x31681106: 168 case 0x31891106: 169 case 0x32051106: 170 case 0x32581106: 171 case 0xb1981106: 172 /* The newer VIA chipsets will select the AGP version based on 173 * what AGP versions the card supports. We still have to 174 * program it using the v2 registers if it has chosen to use 175 * compatibility mode. 176 */ 177 agpsel = pci_read_config(dev, AGP_VIA_AGPSEL, 1); 178 if ((agpsel & (1 << 1)) == 0) 179 sc->regs = via_v3_regs; 180 else 181 sc->regs = via_v2_regs; 182 break; 183 default: 184 sc->regs = via_v2_regs; 185 break; 186 } 187 188 error = agp_generic_attach(dev); 189 if (error) 190 return error; 191 192 sc->initial_aperture = AGP_GET_APERTURE(dev); 193 if (sc->initial_aperture == 0) { 194 device_printf(dev, "bad initial aperture size, disabling\n"); 195 return ENXIO; 196 } 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 if (sc->regs == via_v2_regs) { 215 /* Install the gatt. */ 216 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical | 3, 4); 217 218 /* Enable the aperture. */ 219 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); 220 } else { 221 u_int32_t gartctrl; 222 223 /* Install the gatt. */ 224 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical, 4); 225 226 /* Enable the aperture. */ 227 gartctrl = pci_read_config(dev, sc->regs[REG_ATTBASE], 4); 228 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl | (3 << 7), 4); 229 } 230 231 return 0; 232 } 233 234 static int 235 agp_via_detach(device_t dev) 236 { 237 struct agp_via_softc *sc = device_get_softc(dev); 238 239 agp_free_cdev(dev); 240 241 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0, 4); 242 pci_write_config(dev, sc->regs[REG_ATTBASE], 0, 4); 243 AGP_SET_APERTURE(dev, sc->initial_aperture); 244 agp_free_gatt(sc->gatt); 245 agp_free_res(dev); 246 247 return 0; 248 } 249 250 static u_int32_t 251 agp_via_get_aperture(device_t dev) 252 { 253 struct agp_via_softc *sc = device_get_softc(dev); 254 u_int32_t apsize; 255 256 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 1) & 0x1f; 257 258 /* 259 * The size is determined by the number of low bits of 260 * register APBASE which are forced to zero. The low 20 bits 261 * are always forced to zero and each zero bit in the apsize 262 * field just read forces the corresponding bit in the 27:20 263 * to be zero. We calculate the aperture size accordingly. 264 */ 265 return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1; 266 } 267 268 static int 269 agp_via_set_aperture(device_t dev, u_int32_t aperture) 270 { 271 struct agp_via_softc *sc = device_get_softc(dev); 272 u_int32_t apsize; 273 274 /* 275 * Reverse the magic from get_aperture. 276 */ 277 apsize = ((aperture - 1) >> 20) ^ 0xff; 278 279 /* 280 * Double check for sanity. 281 */ 282 if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture) 283 return EINVAL; 284 285 pci_write_config(dev, sc->regs[REG_APSIZE], apsize, 1); 286 287 return 0; 288 } 289 290 static int 291 agp_via_bind_page(device_t dev, int offset, vm_offset_t physical) 292 { 293 struct agp_via_softc *sc = device_get_softc(dev); 294 295 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 296 return EINVAL; 297 298 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 299 return 0; 300 } 301 302 static int 303 agp_via_unbind_page(device_t dev, int offset) 304 { 305 struct agp_via_softc *sc = device_get_softc(dev); 306 307 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 308 return EINVAL; 309 310 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 311 return 0; 312 } 313 314 static void 315 agp_via_flush_tlb(device_t dev) 316 { 317 struct agp_via_softc *sc = device_get_softc(dev); 318 u_int32_t gartctrl; 319 320 if (sc->regs == via_v2_regs) { 321 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x8f, 4); 322 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); 323 } else { 324 gartctrl = pci_read_config(dev, sc->regs[REG_GARTCTRL], 4); 325 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl & 326 ~(1 << 7), 4); 327 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl, 4); 328 } 329 330 } 331 332 static device_method_t agp_via_methods[] = { 333 /* Device interface */ 334 DEVMETHOD(device_probe, agp_via_probe), 335 DEVMETHOD(device_attach, agp_via_attach), 336 DEVMETHOD(device_detach, agp_via_detach), 337 DEVMETHOD(device_shutdown, bus_generic_shutdown), 338 DEVMETHOD(device_suspend, bus_generic_suspend), 339 DEVMETHOD(device_resume, bus_generic_resume), 340 341 /* AGP interface */ 342 DEVMETHOD(agp_get_aperture, agp_via_get_aperture), 343 DEVMETHOD(agp_set_aperture, agp_via_set_aperture), 344 DEVMETHOD(agp_bind_page, agp_via_bind_page), 345 DEVMETHOD(agp_unbind_page, agp_via_unbind_page), 346 DEVMETHOD(agp_flush_tlb, agp_via_flush_tlb), 347 DEVMETHOD(agp_enable, agp_generic_enable), 348 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 349 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 350 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 351 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 352 353 { 0, 0 } 354 }; 355 356 static driver_t agp_via_driver = { 357 "agp", 358 agp_via_methods, 359 sizeof(struct agp_via_softc), 360 }; 361 362 static devclass_t agp_devclass; 363 364 DRIVER_MODULE(agp_via, pci, agp_via_driver, agp_devclass, NULL, NULL); 365 MODULE_DEPEND(agp_via, agp, 1, 1, 1); 366 MODULE_DEPEND(agp_via, pci, 1, 1, 1); 367