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/pci/agp_via.c,v 1.1.2.2 2001/10/04 09:53:04 ru Exp $ 27 * $DragonFly: src/sys/dev/agp/agp_via.c,v 1.5 2004/07/04 00:24:52 dillon Exp $ 28 */ 29 30 #include "opt_bus.h" 31 #include "opt_pci.h" 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/malloc.h> 36 #include <sys/kernel.h> 37 #include <sys/bus.h> 38 #include <sys/lock.h> 39 40 #include <bus/pci/pcivar.h> 41 #include <bus/pci/pcireg.h> 42 #include "agppriv.h" 43 #include "agpreg.h" 44 45 #include <vm/vm.h> 46 #include <vm/vm_object.h> 47 #include <vm/pmap.h> 48 49 #define REG_GARTCTRL 0 50 #define REG_APSIZE 1 51 #define REG_ATTBASE 2 52 53 struct agp_via_softc { 54 struct agp_softc agp; 55 u_int32_t initial_aperture; /* aperture size at startup */ 56 struct agp_gatt *gatt; 57 int *regs; 58 }; 59 60 static int via_v2_regs[] = { AGP_VIA_GARTCTRL, AGP_VIA_APSIZE, 61 AGP_VIA_ATTBASE }; 62 static int via_v3_regs[] = { AGP3_VIA_GARTCTRL, AGP3_VIA_APSIZE, 63 AGP3_VIA_ATTBASE }; 64 65 static const char* 66 agp_via_match(device_t dev) 67 { 68 if (pci_get_class(dev) != PCIC_BRIDGE 69 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 70 return NULL; 71 72 if (agp_find_caps(dev) == 0) 73 return NULL; 74 75 switch (pci_get_devid(dev)) { 76 case 0x03051106: 77 return ("VIA 82C8363 (Apollo KT133A) host to PCI bridge"); 78 case 0x05011106: 79 return ("VIA 8501 (Apollo MVP4) host to PCI bridge"); 80 case 0x05971106: 81 return ("VIA 82C597 (Apollo VP3) host to PCI bridge"); 82 case 0x05981106: 83 return ("VIA 82C598 (Apollo MVP3) host to PCI bridge"); 84 case 0x06051106: 85 return ("VIA 82C694X (Apollo Pro 133A) host to PCI bridge"); 86 case 0x06911106: 87 return ("VIA 82C691 (Apollo Pro) host to PCI bridge"); 88 case 0x31881106: 89 return ("VIA 8385 host to PCI bridge"); 90 }; 91 92 if (pci_get_vendor(dev) == 0x1106) 93 return ("VIA Generic host to PCI bridge"); 94 95 return NULL; 96 } 97 98 static int 99 agp_via_probe(device_t dev) 100 { 101 const char *desc; 102 103 desc = agp_via_match(dev); 104 if (desc) { 105 device_verbose(dev); 106 device_set_desc(dev, desc); 107 return 0; 108 } 109 110 return ENXIO; 111 } 112 113 static int 114 agp_via_attach(device_t dev) 115 { 116 struct agp_via_softc *sc = device_get_softc(dev); 117 struct agp_gatt *gatt; 118 int error; 119 120 switch (pci_get_devid(dev)) { 121 case 0x31881106: 122 sc->regs = via_v3_regs; 123 break; 124 default: 125 sc->regs = via_v2_regs; 126 break; 127 } 128 129 error = agp_generic_attach(dev); 130 if (error) 131 return error; 132 133 sc->initial_aperture = AGP_GET_APERTURE(dev); 134 135 for (;;) { 136 gatt = agp_alloc_gatt(dev); 137 if (gatt) 138 break; 139 140 /* 141 * Probably contigmalloc failure. Try reducing the 142 * aperture so that the gatt size reduces. 143 */ 144 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 145 agp_generic_detach(dev); 146 return ENOMEM; 147 } 148 } 149 sc->gatt = gatt; 150 151 /* Install the gatt. */ 152 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical | 3, 4); 153 154 /* Enable the aperture. */ 155 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); 156 157 return 0; 158 } 159 160 static int 161 agp_via_detach(device_t dev) 162 { 163 struct agp_via_softc *sc = device_get_softc(dev); 164 int error; 165 166 error = agp_generic_detach(dev); 167 if (error) 168 return error; 169 170 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0, 4); 171 pci_write_config(dev, sc->regs[REG_ATTBASE], 0, 4); 172 AGP_SET_APERTURE(dev, sc->initial_aperture); 173 agp_free_gatt(sc->gatt); 174 175 return 0; 176 } 177 178 static u_int32_t 179 agp_via_get_aperture(device_t dev) 180 { 181 struct agp_via_softc *sc = device_get_softc(dev); 182 u_int32_t apsize; 183 184 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 1) & 0x1f; 185 186 /* 187 * The size is determined by the number of low bits of 188 * register APBASE which are forced to zero. The low 20 bits 189 * are always forced to zero and each zero bit in the apsize 190 * field just read forces the corresponding bit in the 27:20 191 * to be zero. We calculate the aperture size accordingly. 192 */ 193 return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1; 194 } 195 196 static int 197 agp_via_set_aperture(device_t dev, u_int32_t aperture) 198 { 199 struct agp_via_softc *sc = device_get_softc(dev); 200 u_int32_t apsize; 201 202 /* 203 * Reverse the magic from get_aperture. 204 */ 205 apsize = ((aperture - 1) >> 20) ^ 0xff; 206 207 /* 208 * Double check for sanity. 209 */ 210 if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture) 211 return EINVAL; 212 213 pci_write_config(dev, sc->regs[REG_APSIZE], apsize, 1); 214 215 return 0; 216 } 217 218 static int 219 agp_via_bind_page(device_t dev, int offset, vm_offset_t physical) 220 { 221 struct agp_via_softc *sc = device_get_softc(dev); 222 223 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 224 return EINVAL; 225 226 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 227 return 0; 228 } 229 230 static int 231 agp_via_unbind_page(device_t dev, int offset) 232 { 233 struct agp_via_softc *sc = device_get_softc(dev); 234 235 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 236 return EINVAL; 237 238 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 239 return 0; 240 } 241 242 static void 243 agp_via_flush_tlb(device_t dev) 244 { 245 struct agp_via_softc *sc = device_get_softc(dev); 246 247 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x8f, 4); 248 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); 249 } 250 251 static device_method_t agp_via_methods[] = { 252 /* Device interface */ 253 DEVMETHOD(device_probe, agp_via_probe), 254 DEVMETHOD(device_attach, agp_via_attach), 255 DEVMETHOD(device_detach, agp_via_detach), 256 DEVMETHOD(device_shutdown, bus_generic_shutdown), 257 DEVMETHOD(device_suspend, bus_generic_suspend), 258 DEVMETHOD(device_resume, bus_generic_resume), 259 260 /* AGP interface */ 261 DEVMETHOD(agp_get_aperture, agp_via_get_aperture), 262 DEVMETHOD(agp_set_aperture, agp_via_set_aperture), 263 DEVMETHOD(agp_bind_page, agp_via_bind_page), 264 DEVMETHOD(agp_unbind_page, agp_via_unbind_page), 265 DEVMETHOD(agp_flush_tlb, agp_via_flush_tlb), 266 DEVMETHOD(agp_enable, agp_generic_enable), 267 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 268 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 269 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 270 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 271 272 { 0, 0 } 273 }; 274 275 static driver_t agp_via_driver = { 276 "agp", 277 agp_via_methods, 278 sizeof(struct agp_via_softc), 279 }; 280 281 static devclass_t agp_devclass; 282 283 DRIVER_MODULE(agp_via, pci, agp_via_driver, agp_devclass, 0, 0); 284 MODULE_DEPEND(agp_via, agp, 1, 1, 1); 285 MODULE_DEPEND(agp_via, pci, 1, 1, 1); 286