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/dev/agp/agp_sis.c,v 1.22 2007/11/12 21:51:37 jhb Exp $ 27 */ 28 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/malloc.h> 32 #include <sys/kernel.h> 33 #include <sys/bus.h> 34 #include <sys/lock.h> 35 36 #include <bus/pci/pcivar.h> 37 #include <bus/pci/pcireg.h> 38 #include "agppriv.h" 39 #include "agpreg.h" 40 41 #include <vm/vm.h> 42 #include <vm/vm_object.h> 43 #include <vm/pmap.h> 44 45 struct agp_sis_softc { 46 struct agp_softc agp; 47 u_int32_t initial_aperture; /* aperture size at startup */ 48 struct agp_gatt *gatt; 49 }; 50 51 static const char* 52 agp_sis_match(device_t dev) 53 { 54 if (pci_get_class(dev) != PCIC_BRIDGE 55 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 56 return NULL; 57 58 if (agp_find_caps(dev) == 0) 59 return NULL; 60 61 switch (pci_get_devid(dev)) { 62 case 0x00011039: 63 return ("SiS 5591 host to AGP bridge"); 64 case 0x05301039: 65 return ("SiS 530 host to AGP bridge"); 66 case 0x05401039: 67 return ("SiS 540 host to AGP bridge"); 68 case 0x05501039: 69 return ("SiS 550 host to AGP bridge"); 70 case 0x06201039: 71 return ("SiS 620 host to AGP bridge"); 72 case 0x06301039: 73 return ("SiS 630 host to AGP bridge"); 74 case 0x06451039: 75 return ("SiS 645 host to AGP bridge"); 76 case 0x06461039: 77 return ("SiS 645DX host to AGP bridge"); 78 case 0x06481039: 79 return ("SiS 648 host to AGP bridge"); 80 case 0x06501039: 81 return ("SiS 650 host to AGP bridge"); 82 case 0x06511039: 83 return ("SiS 651 host to AGP bridge"); 84 case 0x06551039: 85 return ("SiS 655 host to AGP bridge"); 86 case 0x06611039: 87 return ("SiS 661 host to AGP bridge"); 88 case 0x07301039: 89 return ("SiS 730 host to AGP bridge"); 90 case 0x07351039: 91 return ("SiS 735 host to AGP bridge"); 92 case 0x07401039: 93 return ("SiS 740 host to AGP bridge"); 94 case 0x07411039: 95 return ("SiS 741 host to AGP bridge"); 96 case 0x07451039: 97 return ("SiS 745 host to AGP bridge"); 98 case 0x07461039: 99 return ("SiS 746 host to AGP bridge"); 100 } 101 102 return NULL; 103 } 104 105 static int 106 agp_sis_probe(device_t dev) 107 { 108 const char *desc; 109 110 if (resource_disabled("agp", device_get_unit(dev))) 111 return (ENXIO); 112 desc = agp_sis_match(dev); 113 if (desc) { 114 device_verbose(dev); 115 device_set_desc(dev, desc); 116 return BUS_PROBE_DEFAULT; 117 } 118 119 return ENXIO; 120 } 121 122 static int 123 agp_sis_attach(device_t dev) 124 { 125 struct agp_sis_softc *sc = device_get_softc(dev); 126 struct agp_gatt *gatt; 127 int error; 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, AGP_SIS_ATTBASE, gatt->ag_physical, 4); 153 154 /* Enable the aperture. */ 155 pci_write_config(dev, AGP_SIS_WINCTRL, 156 pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1); 157 158 /* 159 * Enable the TLB and make it automatically invalidate entries 160 * when the GATT is written. 161 */ 162 pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1); 163 164 return 0; 165 } 166 167 static int 168 agp_sis_detach(device_t dev) 169 { 170 struct agp_sis_softc *sc = device_get_softc(dev); 171 172 agp_free_cdev(dev); 173 174 /* Disable the aperture.. */ 175 pci_write_config(dev, AGP_SIS_WINCTRL, 176 pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1); 177 178 /* and the TLB. */ 179 pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1); 180 181 /* Put the aperture back the way it started. */ 182 AGP_SET_APERTURE(dev, sc->initial_aperture); 183 184 agp_free_gatt(sc->gatt); 185 agp_free_res(dev); 186 return 0; 187 } 188 189 static u_int32_t 190 agp_sis_get_aperture(device_t dev) 191 { 192 int gws; 193 194 /* 195 * The aperture size is equal to 4M<<gws. 196 */ 197 gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4; 198 return (4*1024*1024) << gws; 199 } 200 201 static int 202 agp_sis_set_aperture(device_t dev, u_int32_t aperture) 203 { 204 int gws; 205 206 /* 207 * Check for a power of two and make sure its within the 208 * programmable range. 209 */ 210 if (aperture & (aperture - 1) 211 || aperture < 4*1024*1024 212 || aperture > 256*1024*1024) 213 return EINVAL; 214 215 gws = ffs(aperture / 4*1024*1024) - 1; 216 217 pci_write_config(dev, AGP_SIS_WINCTRL, 218 ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70) 219 | gws << 4), 1); 220 221 return 0; 222 } 223 224 static int 225 agp_sis_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical) 226 { 227 struct agp_sis_softc *sc = device_get_softc(dev); 228 229 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 230 return EINVAL; 231 232 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 233 return 0; 234 } 235 236 static int 237 agp_sis_unbind_page(device_t dev, vm_offset_t offset) 238 { 239 struct agp_sis_softc *sc = device_get_softc(dev); 240 241 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 242 return EINVAL; 243 244 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 245 return 0; 246 } 247 248 static void 249 agp_sis_flush_tlb(device_t dev) 250 { 251 pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1); 252 } 253 254 static device_method_t agp_sis_methods[] = { 255 /* Device interface */ 256 DEVMETHOD(device_probe, agp_sis_probe), 257 DEVMETHOD(device_attach, agp_sis_attach), 258 DEVMETHOD(device_detach, agp_sis_detach), 259 DEVMETHOD(device_shutdown, bus_generic_shutdown), 260 DEVMETHOD(device_suspend, bus_generic_suspend), 261 DEVMETHOD(device_resume, bus_generic_resume), 262 263 /* AGP interface */ 264 DEVMETHOD(agp_get_aperture, agp_sis_get_aperture), 265 DEVMETHOD(agp_set_aperture, agp_sis_set_aperture), 266 DEVMETHOD(agp_bind_page, agp_sis_bind_page), 267 DEVMETHOD(agp_unbind_page, agp_sis_unbind_page), 268 DEVMETHOD(agp_flush_tlb, agp_sis_flush_tlb), 269 DEVMETHOD(agp_enable, agp_generic_enable), 270 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 271 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 272 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 273 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 274 275 DEVMETHOD_END 276 }; 277 278 static driver_t agp_sis_driver = { 279 "agp", 280 agp_sis_methods, 281 sizeof(struct agp_sis_softc), 282 }; 283 284 static devclass_t agp_devclass; 285 286 DRIVER_MODULE(agp_sis, pci, agp_sis_driver, agp_devclass, NULL, NULL); 287 MODULE_DEPEND(agp_sis, agp, 1, 1, 1); 288 MODULE_DEPEND(agp_sis, pci, 1, 1, 1); 289