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_sis.c,v 1.1.2.1 2000/07/19 09:48:04 ru Exp $ 27 * $DragonFly: src/sys/dev/agp/agp_sis.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_sis_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_sis_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 0x00011039: 67 return ("SiS 5591 host to AGP bridge"); 68 case 0x06481039: 69 return ("SiS 648 host to AGP bridge"); 70 }; 71 72 if (pci_get_vendor(dev) == 0x1039) 73 return ("SIS Generic host to PCI bridge"); 74 75 return NULL; 76 } 77 78 static int 79 agp_sis_probe(device_t dev) 80 { 81 const char *desc; 82 83 desc = agp_sis_match(dev); 84 if (desc) { 85 device_verbose(dev); 86 device_set_desc(dev, desc); 87 return 0; 88 } 89 90 return ENXIO; 91 } 92 93 static int 94 agp_sis_attach(device_t dev) 95 { 96 struct agp_sis_softc *sc = device_get_softc(dev); 97 struct agp_gatt *gatt; 98 int error; 99 100 error = agp_generic_attach(dev); 101 if (error) 102 return error; 103 104 sc->initial_aperture = AGP_GET_APERTURE(dev); 105 if (sc->initial_aperture == 0) { 106 device_printf(dev, "bad initial aperture size, disabling\n"); 107 return ENXIO; 108 } 109 110 for (;;) { 111 gatt = agp_alloc_gatt(dev); 112 if (gatt) 113 break; 114 115 /* 116 * Probably contigmalloc failure. Try reducing the 117 * aperture so that the gatt size reduces. 118 */ 119 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 120 agp_generic_detach(dev); 121 return ENOMEM; 122 } 123 } 124 sc->gatt = gatt; 125 126 /* Install the gatt. */ 127 pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4); 128 129 /* Enable the aperture. */ 130 pci_write_config(dev, AGP_SIS_WINCTRL, 131 pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1); 132 133 /* 134 * Enable the TLB and make it automatically invalidate entries 135 * when the GATT is written. 136 */ 137 pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1); 138 139 return 0; 140 } 141 142 static int 143 agp_sis_detach(device_t dev) 144 { 145 struct agp_sis_softc *sc = device_get_softc(dev); 146 int error; 147 148 error = agp_generic_detach(dev); 149 if (error) 150 return error; 151 152 /* Disable the aperture.. */ 153 pci_write_config(dev, AGP_SIS_WINCTRL, 154 pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1); 155 156 /* and the TLB. */ 157 pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1); 158 159 /* Put the aperture back the way it started. */ 160 AGP_SET_APERTURE(dev, sc->initial_aperture); 161 162 agp_free_gatt(sc->gatt); 163 return 0; 164 } 165 166 static u_int32_t 167 agp_sis_get_aperture(device_t dev) 168 { 169 int gws; 170 171 /* 172 * The aperture size is equal to 4M<<gws. 173 */ 174 gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4; 175 return (4*1024*1024) << gws; 176 } 177 178 static int 179 agp_sis_set_aperture(device_t dev, u_int32_t aperture) 180 { 181 int gws; 182 183 /* 184 * Check for a power of two and make sure its within the 185 * programmable range. 186 */ 187 if (aperture & (aperture - 1) 188 || aperture < 4*1024*1024 189 || aperture > 256*1024*1024) 190 return EINVAL; 191 192 gws = ffs(aperture / 4*1024*1024) - 1; 193 194 pci_write_config(dev, AGP_SIS_WINCTRL, 195 ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70) 196 | gws << 4), 1); 197 198 return 0; 199 } 200 201 static int 202 agp_sis_bind_page(device_t dev, int offset, vm_offset_t physical) 203 { 204 struct agp_sis_softc *sc = device_get_softc(dev); 205 206 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 207 return EINVAL; 208 209 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 210 return 0; 211 } 212 213 static int 214 agp_sis_unbind_page(device_t dev, int offset) 215 { 216 struct agp_sis_softc *sc = device_get_softc(dev); 217 218 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 219 return EINVAL; 220 221 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 222 return 0; 223 } 224 225 static void 226 agp_sis_flush_tlb(device_t dev) 227 { 228 pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1); 229 } 230 231 static device_method_t agp_sis_methods[] = { 232 /* Device interface */ 233 DEVMETHOD(device_probe, agp_sis_probe), 234 DEVMETHOD(device_attach, agp_sis_attach), 235 DEVMETHOD(device_detach, agp_sis_detach), 236 DEVMETHOD(device_shutdown, bus_generic_shutdown), 237 DEVMETHOD(device_suspend, bus_generic_suspend), 238 DEVMETHOD(device_resume, bus_generic_resume), 239 240 /* AGP interface */ 241 DEVMETHOD(agp_get_aperture, agp_sis_get_aperture), 242 DEVMETHOD(agp_set_aperture, agp_sis_set_aperture), 243 DEVMETHOD(agp_bind_page, agp_sis_bind_page), 244 DEVMETHOD(agp_unbind_page, agp_sis_unbind_page), 245 DEVMETHOD(agp_flush_tlb, agp_sis_flush_tlb), 246 DEVMETHOD(agp_enable, agp_generic_enable), 247 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 248 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 249 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 250 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 251 252 { 0, 0 } 253 }; 254 255 static driver_t agp_sis_driver = { 256 "agp", 257 agp_sis_methods, 258 sizeof(struct agp_sis_softc), 259 }; 260 261 static devclass_t agp_devclass; 262 263 DRIVER_MODULE(agp_sis, pci, agp_sis_driver, agp_devclass, 0, 0); 264 MODULE_DEPEND(agp_sis, agp, 1, 1, 1); 265 MODULE_DEPEND(agp_sis, pci, 1, 1, 1); 266