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 1.4 2003/12/09 19:40:56 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 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 }; 54 55 static const char* 56 agp_via_match(device_t dev) 57 { 58 if (pci_get_class(dev) != PCIC_BRIDGE 59 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 60 return NULL; 61 62 if (agp_find_caps(dev) == 0) 63 return NULL; 64 65 switch (pci_get_devid(dev)) { 66 case 0x03051106: 67 return ("VIA 82C8363 (Apollo KT133A) host to PCI bridge"); 68 case 0x05011106: 69 return ("VIA 8501 (Apollo MVP4) host to PCI bridge"); 70 case 0x05971106: 71 return ("VIA 82C597 (Apollo VP3) host to PCI bridge"); 72 case 0x05981106: 73 return ("VIA 82C598 (Apollo MVP3) host to PCI bridge"); 74 case 0x06051106: 75 return ("VIA 82C694X (Apollo Pro 133A) host to PCI bridge"); 76 case 0x06911106: 77 return ("VIA 82C691 (Apollo Pro) host to PCI bridge"); 78 }; 79 80 if (pci_get_vendor(dev) == 0x1106) 81 return ("VIA Generic host to PCI bridge"); 82 83 return NULL; 84 } 85 86 static int 87 agp_via_probe(device_t dev) 88 { 89 const char *desc; 90 91 desc = agp_via_match(dev); 92 if (desc) { 93 device_verbose(dev); 94 device_set_desc(dev, desc); 95 return 0; 96 } 97 98 return ENXIO; 99 } 100 101 static int 102 agp_via_attach(device_t dev) 103 { 104 struct agp_via_softc *sc = device_get_softc(dev); 105 struct agp_gatt *gatt; 106 int error; 107 108 error = agp_generic_attach(dev); 109 if (error) 110 return error; 111 112 sc->initial_aperture = AGP_GET_APERTURE(dev); 113 if (sc->initial_aperture == 0) { 114 device_printf(dev, "bad initial aperture size, disabling\n"); 115 return ENXIO; 116 } 117 118 for (;;) { 119 gatt = agp_alloc_gatt(dev); 120 if (gatt) 121 break; 122 123 /* 124 * Probably contigmalloc failure. Try reducing the 125 * aperture so that the gatt size reduces. 126 */ 127 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 128 agp_generic_detach(dev); 129 return ENOMEM; 130 } 131 } 132 sc->gatt = gatt; 133 134 /* Install the gatt. */ 135 pci_write_config(dev, AGP_VIA_ATTBASE, gatt->ag_physical | 3, 4); 136 137 /* Enable the aperture. */ 138 pci_write_config(dev, AGP_VIA_GARTCTRL, 0x0f, 4); 139 140 return 0; 141 } 142 143 static int 144 agp_via_detach(device_t dev) 145 { 146 struct agp_via_softc *sc = device_get_softc(dev); 147 int error; 148 149 error = agp_generic_detach(dev); 150 if (error) 151 return error; 152 153 pci_write_config(dev, AGP_VIA_GARTCTRL, 0, 4); 154 pci_write_config(dev, AGP_VIA_ATTBASE, 0, 4); 155 AGP_SET_APERTURE(dev, sc->initial_aperture); 156 agp_free_gatt(sc->gatt); 157 158 return 0; 159 } 160 161 static u_int32_t 162 agp_via_get_aperture(device_t dev) 163 { 164 u_int32_t apsize; 165 166 apsize = pci_read_config(dev, AGP_VIA_APSIZE, 1) & 0x1f; 167 168 /* 169 * The size is determined by the number of low bits of 170 * register APBASE which are forced to zero. The low 20 bits 171 * are always forced to zero and each zero bit in the apsize 172 * field just read forces the corresponding bit in the 27:20 173 * to be zero. We calculate the aperture size accordingly. 174 */ 175 return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1; 176 } 177 178 static int 179 agp_via_set_aperture(device_t dev, u_int32_t aperture) 180 { 181 u_int32_t apsize; 182 183 /* 184 * Reverse the magic from get_aperture. 185 */ 186 apsize = ((aperture - 1) >> 20) ^ 0xff; 187 188 /* 189 * Double check for sanity. 190 */ 191 if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture) 192 return EINVAL; 193 194 pci_write_config(dev, AGP_VIA_APSIZE, apsize, 1); 195 196 return 0; 197 } 198 199 static int 200 agp_via_bind_page(device_t dev, int offset, vm_offset_t physical) 201 { 202 struct agp_via_softc *sc = device_get_softc(dev); 203 204 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 205 return EINVAL; 206 207 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 208 return 0; 209 } 210 211 static int 212 agp_via_unbind_page(device_t dev, int offset) 213 { 214 struct agp_via_softc *sc = device_get_softc(dev); 215 216 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 217 return EINVAL; 218 219 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 220 return 0; 221 } 222 223 static void 224 agp_via_flush_tlb(device_t dev) 225 { 226 pci_write_config(dev, AGP_VIA_GARTCTRL, 0x8f, 4); 227 pci_write_config(dev, AGP_VIA_GARTCTRL, 0x0f, 4); 228 } 229 230 static device_method_t agp_via_methods[] = { 231 /* Device interface */ 232 DEVMETHOD(device_probe, agp_via_probe), 233 DEVMETHOD(device_attach, agp_via_attach), 234 DEVMETHOD(device_detach, agp_via_detach), 235 DEVMETHOD(device_shutdown, bus_generic_shutdown), 236 DEVMETHOD(device_suspend, bus_generic_suspend), 237 DEVMETHOD(device_resume, bus_generic_resume), 238 239 /* AGP interface */ 240 DEVMETHOD(agp_get_aperture, agp_via_get_aperture), 241 DEVMETHOD(agp_set_aperture, agp_via_set_aperture), 242 DEVMETHOD(agp_bind_page, agp_via_bind_page), 243 DEVMETHOD(agp_unbind_page, agp_via_unbind_page), 244 DEVMETHOD(agp_flush_tlb, agp_via_flush_tlb), 245 DEVMETHOD(agp_enable, agp_generic_enable), 246 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 247 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 248 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 249 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 250 251 { 0, 0 } 252 }; 253 254 static driver_t agp_via_driver = { 255 "agp", 256 agp_via_methods, 257 sizeof(struct agp_via_softc), 258 }; 259 260 static devclass_t agp_devclass; 261 262 DRIVER_MODULE(agp_via, pci, agp_via_driver, agp_devclass, 0, 0); 263 MODULE_DEPEND(agp_via, agp, 1, 1, 1); 264 MODULE_DEPEND(agp_via, pci, 1, 1, 1); 265