agp_via.c revision 131433
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 131433 2004-07-02 03:39:33Z 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 0x03051106: 79 return ("VIA 82C8363 (Apollo KT133A) host to PCI bridge"); 80 case 0x05011106: 81 return ("VIA 8501 (Apollo MVP4) host to PCI bridge"); 82 case 0x05971106: 83 return ("VIA 82C597 (Apollo VP3) host to PCI bridge"); 84 case 0x05981106: 85 return ("VIA 82C598 (Apollo MVP3) host to PCI bridge"); 86 case 0x06051106: 87 return ("VIA 82C694X (Apollo Pro 133A) host to PCI bridge"); 88 case 0x06911106: 89 return ("VIA 82C691 (Apollo Pro) host to PCI bridge"); 90 case 0x31881106: 91 return ("VIA 8385 host to PCI bridge"); 92 case 0x31891106: 93 return ("VIA 8377 (Apollo KT400/KT400A/KT600) host to PCI bridge"); 94 }; 95 96 if (pci_get_vendor(dev) == 0x1106) 97 return ("VIA Generic host to PCI bridge"); 98 99 return NULL; 100} 101 102static int 103agp_via_probe(device_t dev) 104{ 105 const char *desc; 106 107 if (resource_disabled("agp", device_get_unit(dev))) 108 return (ENXIO); 109 desc = agp_via_match(dev); 110 if (desc) { 111 device_verbose(dev); 112 device_set_desc(dev, desc); 113 return 0; 114 } 115 116 return ENXIO; 117} 118 119static int 120agp_via_attach(device_t dev) 121{ 122 struct agp_via_softc *sc = device_get_softc(dev); 123 struct agp_gatt *gatt; 124 int error; 125 126 switch (pci_get_devid(dev)) { 127 case 0x31881106: 128 case 0x31891106: 129 sc->regs = via_v3_regs; 130 break; 131 default: 132 sc->regs = via_v2_regs; 133 break; 134 } 135 136 error = agp_generic_attach(dev); 137 if (error) 138 return error; 139 140 sc->initial_aperture = AGP_GET_APERTURE(dev); 141 142 for (;;) { 143 gatt = agp_alloc_gatt(dev); 144 if (gatt) 145 break; 146 147 /* 148 * Probably contigmalloc failure. Try reducing the 149 * aperture so that the gatt size reduces. 150 */ 151 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 152 agp_generic_detach(dev); 153 return ENOMEM; 154 } 155 } 156 sc->gatt = gatt; 157 158 /* Install the gatt. */ 159 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical | 3, 4); 160 161 /* Enable the aperture. */ 162 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); 163 164 return 0; 165} 166 167static int 168agp_via_detach(device_t dev) 169{ 170 struct agp_via_softc *sc = device_get_softc(dev); 171 int error; 172 173 error = agp_generic_detach(dev); 174 if (error) 175 return error; 176 177 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0, 4); 178 pci_write_config(dev, sc->regs[REG_ATTBASE], 0, 4); 179 AGP_SET_APERTURE(dev, sc->initial_aperture); 180 agp_free_gatt(sc->gatt); 181 182 return 0; 183} 184 185static u_int32_t 186agp_via_get_aperture(device_t dev) 187{ 188 struct agp_via_softc *sc = device_get_softc(dev); 189 u_int32_t apsize; 190 191 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 1) & 0x1f; 192 193 /* 194 * The size is determined by the number of low bits of 195 * register APBASE which are forced to zero. The low 20 bits 196 * are always forced to zero and each zero bit in the apsize 197 * field just read forces the corresponding bit in the 27:20 198 * to be zero. We calculate the aperture size accordingly. 199 */ 200 return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1; 201} 202 203static int 204agp_via_set_aperture(device_t dev, u_int32_t aperture) 205{ 206 struct agp_via_softc *sc = device_get_softc(dev); 207 u_int32_t apsize; 208 209 /* 210 * Reverse the magic from get_aperture. 211 */ 212 apsize = ((aperture - 1) >> 20) ^ 0xff; 213 214 /* 215 * Double check for sanity. 216 */ 217 if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture) 218 return EINVAL; 219 220 pci_write_config(dev, sc->regs[REG_APSIZE], apsize, 1); 221 222 return 0; 223} 224 225static int 226agp_via_bind_page(device_t dev, int offset, vm_offset_t physical) 227{ 228 struct agp_via_softc *sc = device_get_softc(dev); 229 230 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 231 return EINVAL; 232 233 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 234 return 0; 235} 236 237static int 238agp_via_unbind_page(device_t dev, int offset) 239{ 240 struct agp_via_softc *sc = device_get_softc(dev); 241 242 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 243 return EINVAL; 244 245 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 246 return 0; 247} 248 249static void 250agp_via_flush_tlb(device_t dev) 251{ 252 struct agp_via_softc *sc = device_get_softc(dev); 253 254 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x8f, 4); 255 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); 256} 257 258static device_method_t agp_via_methods[] = { 259 /* Device interface */ 260 DEVMETHOD(device_probe, agp_via_probe), 261 DEVMETHOD(device_attach, agp_via_attach), 262 DEVMETHOD(device_detach, agp_via_detach), 263 DEVMETHOD(device_shutdown, bus_generic_shutdown), 264 DEVMETHOD(device_suspend, bus_generic_suspend), 265 DEVMETHOD(device_resume, bus_generic_resume), 266 267 /* AGP interface */ 268 DEVMETHOD(agp_get_aperture, agp_via_get_aperture), 269 DEVMETHOD(agp_set_aperture, agp_via_set_aperture), 270 DEVMETHOD(agp_bind_page, agp_via_bind_page), 271 DEVMETHOD(agp_unbind_page, agp_via_unbind_page), 272 DEVMETHOD(agp_flush_tlb, agp_via_flush_tlb), 273 DEVMETHOD(agp_enable, agp_generic_enable), 274 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 275 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 276 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 277 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 278 279 { 0, 0 } 280}; 281 282static driver_t agp_via_driver = { 283 "agp", 284 agp_via_methods, 285 sizeof(struct agp_via_softc), 286}; 287 288static devclass_t agp_devclass; 289 290DRIVER_MODULE(agp_via, pci, agp_via_driver, agp_devclass, 0, 0); 291MODULE_DEPEND(agp_via, agp, 1, 1, 1); 292MODULE_DEPEND(agp_via, pci, 1, 1, 1); 293