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 <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/malloc.h> 32 #include <sys/kernel.h> 33 #include <sys/bus.h> 34 #include <sys/lock.h> 35 36 #include <bus/pci/pcivar.h> 37 #include <bus/pci/pcireg.h> 38 #include "agppriv.h" 39 #include "agpreg.h" 40 41 #include <vm/vm.h> 42 #include <vm/vm_object.h> 43 #include <vm/pmap.h> 44 45 #define REG_GARTCTRL 0 46 #define REG_APSIZE 1 47 #define REG_ATTBASE 2 48 49 struct agp_via_softc { 50 struct agp_softc agp; 51 u_int32_t initial_aperture; /* aperture size at startup */ 52 struct agp_gatt *gatt; 53 int *regs; 54 }; 55 56 static int via_v2_regs[] = { AGP_VIA_GARTCTRL, AGP_VIA_APSIZE, 57 AGP_VIA_ATTBASE }; 58 static int via_v3_regs[] = { AGP3_VIA_GARTCTRL, AGP3_VIA_APSIZE, 59 AGP3_VIA_ATTBASE }; 60 61 static const char* 62 agp_via_match(device_t dev) 63 { 64 if (pci_get_class(dev) != PCIC_BRIDGE 65 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 66 return NULL; 67 68 if (agp_find_caps(dev) == 0) 69 return NULL; 70 71 switch (pci_get_devid(dev)) { 72 case 0x01981106: 73 return ("VIA 8763 (P4X600) host to PCI bridge"); 74 case 0x02591106: 75 return ("VIA PM800/PN800/PM880/PN880 host to PCI bridge"); 76 case 0x02691106: 77 return ("VIA KT880 host to PCI bridge"); 78 case 0x02961106: 79 return ("VIA 3296 (P4M800) host to PCI bridge"); 80 case 0x03051106: 81 return ("VIA 82C8363 (Apollo KT133x/KM133) host to PCI bridge"); 82 case 0x03911106: 83 return ("VIA 8371 (Apollo KX133) host to PCI bridge"); 84 case 0x05011106: 85 return ("VIA 8501 (Apollo MVP4) host to PCI bridge"); 86 case 0x05971106: 87 return ("VIA 82C597 (Apollo VP3) host to PCI bridge"); 88 case 0x05981106: 89 return ("VIA 82C598 (Apollo MVP3) host to PCI bridge"); 90 case 0x06011106: 91 return ("VIA 8601 (Apollo ProMedia/PLE133Ta) host to PCI bridge"); 92 case 0x06051106: 93 return ("VIA 82C694X (Apollo Pro 133A) host to PCI bridge"); 94 case 0x06911106: 95 return ("VIA 82C691 (Apollo Pro) host to PCI bridge"); 96 case 0x30911106: 97 return ("VIA 8633 (Pro 266) host to PCI bridge"); 98 case 0x30991106: 99 return ("VIA 8367 (KT266/KY266x/KT333) host to PCI bridge"); 100 case 0x31011106: 101 return ("VIA 8653 (Pro266T) host to PCI bridge"); 102 case 0x31121106: 103 return ("VIA 8361 (KLE133) host to PCI bridge"); 104 case 0x31161106: 105 return ("VIA XM266 (PM266/KM266) host to PCI bridge"); 106 case 0x31231106: 107 return ("VIA 862x (CLE266) host to PCI bridge"); 108 case 0x31281106: 109 return ("VIA 8753 (P4X266) host to PCI bridge"); 110 case 0x31481106: 111 return ("VIA 8703 (P4M266x/P4N266) host to PCI bridge"); 112 case 0x31561106: 113 return ("VIA XN266 (Apollo Pro266) host to PCI bridge"); 114 case 0x31681106: 115 return ("VIA 8754 (PT800) host to PCI bridge"); 116 case 0x31891106: 117 return ("VIA 8377 (Apollo KT400/KT400A/KT600) host to PCI bridge"); 118 case 0x32051106: 119 return ("VIA 8235/8237 (Apollo KM400/KM400A) host to PCI bridge"); 120 case 0x32081106: 121 return ("VIA 8783 (PT890) host to PCI bridge"); 122 case 0x32581106: 123 return ("VIA PT880 host to PCI bridge"); 124 case 0xb1981106: 125 return ("VIA VT83xx/VT87xx/KTxxx/Px8xx host to PCI bridge"); 126 }; 127 128 return NULL; 129 } 130 131 static int 132 agp_via_probe(device_t dev) 133 { 134 const char *desc; 135 136 if (resource_disabled("agp", device_get_unit(dev))) 137 return (ENXIO); 138 desc = agp_via_match(dev); 139 if (desc) { 140 device_verbose(dev); 141 device_set_desc(dev, desc); 142 return BUS_PROBE_DEFAULT; 143 } 144 145 return ENXIO; 146 } 147 148 static int 149 agp_via_attach(device_t dev) 150 { 151 struct agp_via_softc *sc = device_get_softc(dev); 152 struct agp_gatt *gatt; 153 int error; 154 u_int32_t agpsel; 155 156 /* XXX: This should be keying off of whether the bridge is AGP3 capable, 157 * rather than a bunch of device ids for chipsets that happen to do 8x. 158 */ 159 switch (pci_get_devid(dev)) { 160 case 0x01981106: 161 case 0x02591106: 162 case 0x02691106: 163 case 0x02961106: 164 case 0x31231106: 165 case 0x31681106: 166 case 0x31891106: 167 case 0x32051106: 168 case 0x32581106: 169 case 0xb1981106: 170 /* The newer VIA chipsets will select the AGP version based on 171 * what AGP versions the card supports. We still have to 172 * program it using the v2 registers if it has chosen to use 173 * compatibility mode. 174 */ 175 agpsel = pci_read_config(dev, AGP_VIA_AGPSEL, 1); 176 if ((agpsel & (1 << 1)) == 0) 177 sc->regs = via_v3_regs; 178 else 179 sc->regs = via_v2_regs; 180 break; 181 default: 182 sc->regs = via_v2_regs; 183 break; 184 } 185 186 error = agp_generic_attach(dev); 187 if (error) 188 return error; 189 190 sc->initial_aperture = AGP_GET_APERTURE(dev); 191 if (sc->initial_aperture == 0) { 192 device_printf(dev, "bad initial aperture size, disabling\n"); 193 return ENXIO; 194 } 195 196 for (;;) { 197 gatt = agp_alloc_gatt(dev); 198 if (gatt) 199 break; 200 201 /* 202 * Probably contigmalloc failure. Try reducing the 203 * aperture so that the gatt size reduces. 204 */ 205 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 206 agp_generic_detach(dev); 207 return ENOMEM; 208 } 209 } 210 sc->gatt = gatt; 211 212 if (sc->regs == via_v2_regs) { 213 /* Install the gatt. */ 214 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical | 3, 4); 215 216 /* Enable the aperture. */ 217 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); 218 } else { 219 u_int32_t gartctrl; 220 221 /* Install the gatt. */ 222 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical, 4); 223 224 /* Enable the aperture. */ 225 gartctrl = pci_read_config(dev, sc->regs[REG_ATTBASE], 4); 226 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl | (3 << 7), 4); 227 } 228 229 return 0; 230 } 231 232 static int 233 agp_via_detach(device_t dev) 234 { 235 struct agp_via_softc *sc = device_get_softc(dev); 236 237 agp_free_cdev(dev); 238 239 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0, 4); 240 pci_write_config(dev, sc->regs[REG_ATTBASE], 0, 4); 241 AGP_SET_APERTURE(dev, sc->initial_aperture); 242 agp_free_gatt(sc->gatt); 243 agp_free_res(dev); 244 245 return 0; 246 } 247 248 static u_int32_t 249 agp_via_get_aperture(device_t dev) 250 { 251 struct agp_via_softc *sc = device_get_softc(dev); 252 u_int32_t apsize; 253 254 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 1) & 0x1f; 255 256 /* 257 * The size is determined by the number of low bits of 258 * register APBASE which are forced to zero. The low 20 bits 259 * are always forced to zero and each zero bit in the apsize 260 * field just read forces the corresponding bit in the 27:20 261 * to be zero. We calculate the aperture size accordingly. 262 */ 263 return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1; 264 } 265 266 static int 267 agp_via_set_aperture(device_t dev, u_int32_t aperture) 268 { 269 struct agp_via_softc *sc = device_get_softc(dev); 270 u_int32_t apsize; 271 272 /* 273 * Reverse the magic from get_aperture. 274 */ 275 apsize = ((aperture - 1) >> 20) ^ 0xff; 276 277 /* 278 * Double check for sanity. 279 */ 280 if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture) 281 return EINVAL; 282 283 pci_write_config(dev, sc->regs[REG_APSIZE], apsize, 1); 284 285 return 0; 286 } 287 288 static int 289 agp_via_bind_page(device_t dev, int offset, vm_offset_t physical) 290 { 291 struct agp_via_softc *sc = device_get_softc(dev); 292 293 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 294 return EINVAL; 295 296 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 297 return 0; 298 } 299 300 static int 301 agp_via_unbind_page(device_t dev, int offset) 302 { 303 struct agp_via_softc *sc = device_get_softc(dev); 304 305 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 306 return EINVAL; 307 308 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 309 return 0; 310 } 311 312 static void 313 agp_via_flush_tlb(device_t dev) 314 { 315 struct agp_via_softc *sc = device_get_softc(dev); 316 u_int32_t gartctrl; 317 318 if (sc->regs == via_v2_regs) { 319 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x8f, 4); 320 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); 321 } else { 322 gartctrl = pci_read_config(dev, sc->regs[REG_GARTCTRL], 4); 323 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl & 324 ~(1 << 7), 4); 325 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl, 4); 326 } 327 328 } 329 330 static device_method_t agp_via_methods[] = { 331 /* Device interface */ 332 DEVMETHOD(device_probe, agp_via_probe), 333 DEVMETHOD(device_attach, agp_via_attach), 334 DEVMETHOD(device_detach, agp_via_detach), 335 DEVMETHOD(device_shutdown, bus_generic_shutdown), 336 DEVMETHOD(device_suspend, bus_generic_suspend), 337 DEVMETHOD(device_resume, bus_generic_resume), 338 339 /* AGP interface */ 340 DEVMETHOD(agp_get_aperture, agp_via_get_aperture), 341 DEVMETHOD(agp_set_aperture, agp_via_set_aperture), 342 DEVMETHOD(agp_bind_page, agp_via_bind_page), 343 DEVMETHOD(agp_unbind_page, agp_via_unbind_page), 344 DEVMETHOD(agp_flush_tlb, agp_via_flush_tlb), 345 DEVMETHOD(agp_enable, agp_generic_enable), 346 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 347 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 348 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 349 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 350 351 { 0, 0 } 352 }; 353 354 static driver_t agp_via_driver = { 355 "agp", 356 agp_via_methods, 357 sizeof(struct agp_via_softc), 358 }; 359 360 static devclass_t agp_devclass; 361 362 DRIVER_MODULE(agp_via, pci, agp_via_driver, agp_devclass, NULL, NULL); 363 MODULE_DEPEND(agp_via, agp, 1, 1, 1); 364 MODULE_DEPEND(agp_via, pci, 1, 1, 1); 365