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 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD$"); 29 30#include <sys/param.h> 31#include <sys/systm.h> 32#include <sys/malloc.h> 33#include <sys/kernel.h> 34#include <sys/module.h> 35#include <sys/bus.h> 36#include <sys/lock.h> 37#include <sys/mutex.h> 38#include <sys/proc.h> 39 40#include <dev/agp/agppriv.h> 41#include <dev/agp/agpreg.h> 42#include <dev/pci/pcivar.h> 43#include <dev/pci/pcireg.h> 44 45#include <vm/vm.h> 46#include <vm/vm_object.h> 47#include <vm/pmap.h> 48 49struct 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 55static const char* 56agp_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 0x05301039: 69 return ("SiS 530 host to AGP bridge"); 70 case 0x05401039: 71 return ("SiS 540 host to AGP bridge"); 72 case 0x05501039: 73 return ("SiS 550 host to AGP bridge"); 74 case 0x06201039: 75 return ("SiS 620 host to AGP bridge"); 76 case 0x06301039: 77 return ("SiS 630 host to AGP bridge"); 78 case 0x06451039: 79 return ("SiS 645 host to AGP bridge"); 80 case 0x06461039: 81 return ("SiS 645DX host to AGP bridge"); 82 case 0x06481039: 83 return ("SiS 648 host to AGP bridge"); 84 case 0x06501039: 85 return ("SiS 650 host to AGP bridge"); 86 case 0x06511039: 87 return ("SiS 651 host to AGP bridge"); 88 case 0x06551039: 89 return ("SiS 655 host to AGP bridge"); 90 case 0x06611039: 91 return ("SiS 661 host to AGP bridge"); 92 case 0x07301039: 93 return ("SiS 730 host to AGP bridge"); 94 case 0x07351039: 95 return ("SiS 735 host to AGP bridge"); 96 case 0x07401039: 97 return ("SiS 740 host to AGP bridge"); 98 case 0x07411039: 99 return ("SiS 741 host to AGP bridge"); 100 case 0x07451039: 101 return ("SiS 745 host to AGP bridge"); 102 case 0x07461039: 103 return ("SiS 746 host to AGP bridge"); 104 } 105 106 return NULL; 107} 108 109static int 110agp_sis_probe(device_t dev) 111{ 112 const char *desc; 113 114 if (resource_disabled("agp", device_get_unit(dev))) 115 return (ENXIO); 116 desc = agp_sis_match(dev); 117 if (desc) { 118 device_set_desc(dev, desc); 119 return BUS_PROBE_DEFAULT; 120 } 121 122 return ENXIO; 123} 124 125static int 126agp_sis_attach(device_t dev) 127{ 128 struct agp_sis_softc *sc = device_get_softc(dev); 129 struct agp_gatt *gatt; 130 int error; 131 132 error = agp_generic_attach(dev); 133 if (error) 134 return error; 135 136 sc->initial_aperture = AGP_GET_APERTURE(dev); 137 138 for (;;) { 139 gatt = agp_alloc_gatt(dev); 140 if (gatt) 141 break; 142 143 /* 144 * Probably contigmalloc failure. Try reducing the 145 * aperture so that the gatt size reduces. 146 */ 147 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 148 agp_generic_detach(dev); 149 return ENOMEM; 150 } 151 } 152 sc->gatt = gatt; 153 154 /* Install the gatt. */ 155 pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4); 156 157 /* Enable the aperture. */ 158 pci_write_config(dev, AGP_SIS_WINCTRL, 159 pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1); 160 161 /* 162 * Enable the TLB and make it automatically invalidate entries 163 * when the GATT is written. 164 */ 165 pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1); 166 167 return 0; 168} 169 170static int 171agp_sis_detach(device_t dev) 172{ 173 struct agp_sis_softc *sc = device_get_softc(dev); 174 175 agp_free_cdev(dev); 176 177 /* Disable the aperture.. */ 178 pci_write_config(dev, AGP_SIS_WINCTRL, 179 pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1); 180 181 /* and the TLB. */ 182 pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1); 183 184 /* Put the aperture back the way it started. */ 185 AGP_SET_APERTURE(dev, sc->initial_aperture); 186 187 agp_free_gatt(sc->gatt); 188 agp_free_res(dev); 189 return 0; 190} 191 192static u_int32_t 193agp_sis_get_aperture(device_t dev) 194{ 195 int gws; 196 197 /* 198 * The aperture size is equal to 4M<<gws. 199 */ 200 gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4; 201 return (4*1024*1024) << gws; 202} 203 204static int 205agp_sis_set_aperture(device_t dev, u_int32_t aperture) 206{ 207 int gws; 208 209 /* 210 * Check for a power of two and make sure its within the 211 * programmable range. 212 */ 213 if (aperture & (aperture - 1) 214 || aperture < 4*1024*1024 215 || aperture > 256*1024*1024) 216 return EINVAL; 217 218 gws = ffs(aperture / 4*1024*1024) - 1; 219 220 pci_write_config(dev, AGP_SIS_WINCTRL, 221 ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70) 222 | gws << 4), 1); 223 224 return 0; 225} 226 227static int 228agp_sis_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical) 229{ 230 struct agp_sis_softc *sc = device_get_softc(dev); 231 232 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 233 return EINVAL; 234 235 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 236 return 0; 237} 238 239static int 240agp_sis_unbind_page(device_t dev, vm_offset_t offset) 241{ 242 struct agp_sis_softc *sc = device_get_softc(dev); 243 244 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 245 return EINVAL; 246 247 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 248 return 0; 249} 250 251static void 252agp_sis_flush_tlb(device_t dev) 253{ 254 pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1); 255} 256 257static device_method_t agp_sis_methods[] = { 258 /* Device interface */ 259 DEVMETHOD(device_probe, agp_sis_probe), 260 DEVMETHOD(device_attach, agp_sis_attach), 261 DEVMETHOD(device_detach, agp_sis_detach), 262 DEVMETHOD(device_shutdown, bus_generic_shutdown), 263 DEVMETHOD(device_suspend, bus_generic_suspend), 264 DEVMETHOD(device_resume, bus_generic_resume), 265 266 /* AGP interface */ 267 DEVMETHOD(agp_get_aperture, agp_sis_get_aperture), 268 DEVMETHOD(agp_set_aperture, agp_sis_set_aperture), 269 DEVMETHOD(agp_bind_page, agp_sis_bind_page), 270 DEVMETHOD(agp_unbind_page, agp_sis_unbind_page), 271 DEVMETHOD(agp_flush_tlb, agp_sis_flush_tlb), 272 DEVMETHOD(agp_enable, agp_generic_enable), 273 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 274 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 275 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 276 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 277 278 { 0, 0 } 279}; 280 281static driver_t agp_sis_driver = { 282 "agp", 283 agp_sis_methods, 284 sizeof(struct agp_sis_softc), 285}; 286 287static devclass_t agp_devclass; 288 289DRIVER_MODULE(agp_sis, hostb, agp_sis_driver, agp_devclass, 0, 0); 290MODULE_DEPEND(agp_sis, agp, 1, 1, 1); 291MODULE_DEPEND(agp_sis, pci, 1, 1, 1); 292