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