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