agp_via.c revision 153572
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: head/sys/dev/agp/agp_via.c 153572 2005-12-20 21:12:26Z jhb $"); 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 55struct 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 62static int via_v2_regs[] = { AGP_VIA_GARTCTRL, AGP_VIA_APSIZE, 63 AGP_VIA_ATTBASE }; 64static int via_v3_regs[] = { AGP3_VIA_GARTCTRL, AGP3_VIA_APSIZE, 65 AGP3_VIA_ATTBASE }; 66 67static const char* 68agp_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 137static int 138agp_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_set_desc(dev, desc); 147 return BUS_PROBE_DEFAULT; 148 } 149 150 return ENXIO; 151} 152 153static int 154agp_via_attach(device_t dev) 155{ 156 struct agp_via_softc *sc = device_get_softc(dev); 157 struct agp_gatt *gatt; 158 int error; 159 u_int32_t agpsel; 160 161 /* XXX: This should be keying off of whether the bridge is AGP3 capable, 162 * rather than a bunch of device ids for chipsets that happen to do 8x. 163 */ 164 switch (pci_get_devid(dev)) { 165 case 0x01981106: 166 case 0x02591106: 167 case 0x02691106: 168 case 0x02961106: 169 case 0x31231106: 170 case 0x31681106: 171 case 0x31891106: 172 case 0x32051106: 173 case 0x32581106: 174 case 0xb1981106: 175 /* The newer VIA chipsets will select the AGP version based on 176 * what AGP versions the card supports. We still have to 177 * program it using the v2 registers if it has chosen to use 178 * compatibility mode. 179 */ 180 agpsel = pci_read_config(dev, AGP_VIA_AGPSEL, 1); 181 if ((agpsel & (1 << 1)) == 0) 182 sc->regs = via_v3_regs; 183 else 184 sc->regs = via_v2_regs; 185 break; 186 default: 187 sc->regs = via_v2_regs; 188 break; 189 } 190 191 error = agp_generic_attach(dev); 192 if (error) 193 return error; 194 195 sc->initial_aperture = AGP_GET_APERTURE(dev); 196 197 for (;;) { 198 gatt = agp_alloc_gatt(dev); 199 if (gatt) 200 break; 201 202 /* 203 * Probably contigmalloc failure. Try reducing the 204 * aperture so that the gatt size reduces. 205 */ 206 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 207 agp_generic_detach(dev); 208 return ENOMEM; 209 } 210 } 211 sc->gatt = gatt; 212 213 if (sc->regs == via_v2_regs) { 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 } else { 220 u_int32_t gartctrl; 221 222 /* Install the gatt. */ 223 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical, 4); 224 225 /* Enable the aperture. */ 226 gartctrl = pci_read_config(dev, sc->regs[REG_ATTBASE], 4); 227 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl | (3 << 7), 4); 228 } 229 230 return 0; 231} 232 233static int 234agp_via_detach(device_t dev) 235{ 236 struct agp_via_softc *sc = device_get_softc(dev); 237 int error; 238 239 error = agp_generic_detach(dev); 240 if (error) 241 return error; 242 243 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0, 4); 244 pci_write_config(dev, sc->regs[REG_ATTBASE], 0, 4); 245 AGP_SET_APERTURE(dev, sc->initial_aperture); 246 agp_free_gatt(sc->gatt); 247 248 return 0; 249} 250 251static u_int32_t 252agp_via_get_aperture(device_t dev) 253{ 254 struct agp_via_softc *sc = device_get_softc(dev); 255 u_int32_t apsize; 256 257 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 1) & 0x1f; 258 259 /* 260 * The size is determined by the number of low bits of 261 * register APBASE which are forced to zero. The low 20 bits 262 * are always forced to zero and each zero bit in the apsize 263 * field just read forces the corresponding bit in the 27:20 264 * to be zero. We calculate the aperture size accordingly. 265 */ 266 return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1; 267} 268 269static int 270agp_via_set_aperture(device_t dev, u_int32_t aperture) 271{ 272 struct agp_via_softc *sc = device_get_softc(dev); 273 u_int32_t apsize; 274 275 /* 276 * Reverse the magic from get_aperture. 277 */ 278 apsize = ((aperture - 1) >> 20) ^ 0xff; 279 280 /* 281 * Double check for sanity. 282 */ 283 if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture) 284 return EINVAL; 285 286 pci_write_config(dev, sc->regs[REG_APSIZE], apsize, 1); 287 288 return 0; 289} 290 291static int 292agp_via_bind_page(device_t dev, int offset, vm_offset_t physical) 293{ 294 struct agp_via_softc *sc = device_get_softc(dev); 295 296 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 297 return EINVAL; 298 299 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 300 return 0; 301} 302 303static int 304agp_via_unbind_page(device_t dev, int offset) 305{ 306 struct agp_via_softc *sc = device_get_softc(dev); 307 308 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 309 return EINVAL; 310 311 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 312 return 0; 313} 314 315static void 316agp_via_flush_tlb(device_t dev) 317{ 318 struct agp_via_softc *sc = device_get_softc(dev); 319 u_int32_t gartctrl; 320 321 if (sc->regs == via_v2_regs) { 322 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x8f, 4); 323 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); 324 } else { 325 gartctrl = pci_read_config(dev, sc->regs[REG_GARTCTRL], 4); 326 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl & 327 ~(1 << 7), 4); 328 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl, 4); 329 } 330 331} 332 333static device_method_t agp_via_methods[] = { 334 /* Device interface */ 335 DEVMETHOD(device_probe, agp_via_probe), 336 DEVMETHOD(device_attach, agp_via_attach), 337 DEVMETHOD(device_detach, agp_via_detach), 338 DEVMETHOD(device_shutdown, bus_generic_shutdown), 339 DEVMETHOD(device_suspend, bus_generic_suspend), 340 DEVMETHOD(device_resume, bus_generic_resume), 341 342 /* AGP interface */ 343 DEVMETHOD(agp_get_aperture, agp_via_get_aperture), 344 DEVMETHOD(agp_set_aperture, agp_via_set_aperture), 345 DEVMETHOD(agp_bind_page, agp_via_bind_page), 346 DEVMETHOD(agp_unbind_page, agp_via_unbind_page), 347 DEVMETHOD(agp_flush_tlb, agp_via_flush_tlb), 348 DEVMETHOD(agp_enable, agp_generic_enable), 349 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 350 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 351 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 352 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 353 354 { 0, 0 } 355}; 356 357static driver_t agp_via_driver = { 358 "agp", 359 agp_via_methods, 360 sizeof(struct agp_via_softc), 361}; 362 363static devclass_t agp_devclass; 364 365DRIVER_MODULE(agp_via, hostb, agp_via_driver, agp_devclass, 0, 0); 366MODULE_DEPEND(agp_via, agp, 1, 1, 1); 367MODULE_DEPEND(agp_via, pci, 1, 1, 1); 368