1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2000 Doug Rabson 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/malloc.h> 35 #include <sys/kernel.h> 36 #include <sys/module.h> 37 #include <sys/bus.h> 38 #include <sys/lock.h> 39 #include <sys/mutex.h> 40 #include <sys/proc.h> 41 42 #include <dev/agp/agppriv.h> 43 #include <dev/agp/agpreg.h> 44 #include <dev/pci/pcivar.h> 45 #include <dev/pci/pcireg.h> 46 47 #include <vm/vm.h> 48 #include <vm/vm_object.h> 49 #include <vm/pmap.h> 50 51 struct agp_sis_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_sis_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 0x00011039: 69 return ("SiS 5591 host to AGP bridge"); 70 case 0x05301039: 71 return ("SiS 530 host to AGP bridge"); 72 case 0x05401039: 73 return ("SiS 540 host to AGP bridge"); 74 case 0x05501039: 75 return ("SiS 550 host to AGP bridge"); 76 case 0x06201039: 77 return ("SiS 620 host to AGP bridge"); 78 case 0x06301039: 79 return ("SiS 630 host to AGP bridge"); 80 case 0x06451039: 81 return ("SiS 645 host to AGP bridge"); 82 case 0x06461039: 83 return ("SiS 645DX host to AGP bridge"); 84 case 0x06481039: 85 return ("SiS 648 host to AGP bridge"); 86 case 0x06501039: 87 return ("SiS 650 host to AGP bridge"); 88 case 0x06511039: 89 return ("SiS 651 host to AGP bridge"); 90 case 0x06551039: 91 return ("SiS 655 host to AGP bridge"); 92 case 0x06611039: 93 return ("SiS 661 host to AGP bridge"); 94 case 0x07301039: 95 return ("SiS 730 host to AGP bridge"); 96 case 0x07351039: 97 return ("SiS 735 host to AGP bridge"); 98 case 0x07401039: 99 return ("SiS 740 host to AGP bridge"); 100 case 0x07411039: 101 return ("SiS 741 host to AGP bridge"); 102 case 0x07451039: 103 return ("SiS 745 host to AGP bridge"); 104 case 0x07461039: 105 return ("SiS 746 host to AGP bridge"); 106 } 107 108 return NULL; 109 } 110 111 static int 112 agp_sis_probe(device_t dev) 113 { 114 const char *desc; 115 116 if (resource_disabled("agp", device_get_unit(dev))) 117 return (ENXIO); 118 desc = agp_sis_match(dev); 119 if (desc) { 120 device_set_desc(dev, desc); 121 return BUS_PROBE_DEFAULT; 122 } 123 124 return ENXIO; 125 } 126 127 static int 128 agp_sis_attach(device_t dev) 129 { 130 struct agp_sis_softc *sc = device_get_softc(dev); 131 struct agp_gatt *gatt; 132 int error; 133 134 error = agp_generic_attach(dev); 135 if (error) 136 return error; 137 138 sc->initial_aperture = AGP_GET_APERTURE(dev); 139 140 for (;;) { 141 gatt = agp_alloc_gatt(dev); 142 if (gatt) 143 break; 144 145 /* 146 * Probably contigmalloc failure. Try reducing the 147 * aperture so that the gatt size reduces. 148 */ 149 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 150 agp_generic_detach(dev); 151 return ENOMEM; 152 } 153 } 154 sc->gatt = gatt; 155 156 /* Install the gatt. */ 157 pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4); 158 159 /* Enable the aperture. */ 160 pci_write_config(dev, AGP_SIS_WINCTRL, 161 pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1); 162 163 /* 164 * Enable the TLB and make it automatically invalidate entries 165 * when the GATT is written. 166 */ 167 pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1); 168 169 return 0; 170 } 171 172 static int 173 agp_sis_detach(device_t dev) 174 { 175 struct agp_sis_softc *sc = device_get_softc(dev); 176 177 agp_free_cdev(dev); 178 179 /* Disable the aperture.. */ 180 pci_write_config(dev, AGP_SIS_WINCTRL, 181 pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1); 182 183 /* and the TLB. */ 184 pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1); 185 186 /* Put the aperture back the way it started. */ 187 AGP_SET_APERTURE(dev, sc->initial_aperture); 188 189 agp_free_gatt(sc->gatt); 190 agp_free_res(dev); 191 return 0; 192 } 193 194 static u_int32_t 195 agp_sis_get_aperture(device_t dev) 196 { 197 int gws; 198 199 /* 200 * The aperture size is equal to 4M<<gws. 201 */ 202 gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4; 203 return (4*1024*1024) << gws; 204 } 205 206 static int 207 agp_sis_set_aperture(device_t dev, u_int32_t aperture) 208 { 209 int gws; 210 211 /* 212 * Check for a power of two and make sure its within the 213 * programmable range. 214 */ 215 if (aperture & (aperture - 1) 216 || aperture < 4*1024*1024 217 || aperture > 256*1024*1024) 218 return EINVAL; 219 220 gws = ffs(aperture / 4*1024*1024) - 1; 221 222 pci_write_config(dev, AGP_SIS_WINCTRL, 223 ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70) 224 | gws << 4), 1); 225 226 return 0; 227 } 228 229 static int 230 agp_sis_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical) 231 { 232 struct agp_sis_softc *sc = device_get_softc(dev); 233 234 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 235 return EINVAL; 236 237 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 238 return 0; 239 } 240 241 static int 242 agp_sis_unbind_page(device_t dev, vm_offset_t offset) 243 { 244 struct agp_sis_softc *sc = device_get_softc(dev); 245 246 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 247 return EINVAL; 248 249 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 250 return 0; 251 } 252 253 static void 254 agp_sis_flush_tlb(device_t dev) 255 { 256 pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1); 257 } 258 259 static device_method_t agp_sis_methods[] = { 260 /* Device interface */ 261 DEVMETHOD(device_probe, agp_sis_probe), 262 DEVMETHOD(device_attach, agp_sis_attach), 263 DEVMETHOD(device_detach, agp_sis_detach), 264 DEVMETHOD(device_shutdown, bus_generic_shutdown), 265 DEVMETHOD(device_suspend, bus_generic_suspend), 266 DEVMETHOD(device_resume, bus_generic_resume), 267 268 /* AGP interface */ 269 DEVMETHOD(agp_get_aperture, agp_sis_get_aperture), 270 DEVMETHOD(agp_set_aperture, agp_sis_set_aperture), 271 DEVMETHOD(agp_bind_page, agp_sis_bind_page), 272 DEVMETHOD(agp_unbind_page, agp_sis_unbind_page), 273 DEVMETHOD(agp_flush_tlb, agp_sis_flush_tlb), 274 DEVMETHOD(agp_enable, agp_generic_enable), 275 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 276 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 277 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 278 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 279 { 0, 0 } 280 }; 281 282 static driver_t agp_sis_driver = { 283 "agp", 284 agp_sis_methods, 285 sizeof(struct agp_sis_softc), 286 }; 287 288 static devclass_t agp_devclass; 289 290 DRIVER_MODULE(agp_sis, hostb, agp_sis_driver, agp_devclass, 0, 0); 291 MODULE_DEPEND(agp_sis, agp, 1, 1, 1); 292 MODULE_DEPEND(agp_sis, pci, 1, 1, 1); 293