1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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/param.h> 30 #include <sys/systm.h> 31 #include <sys/malloc.h> 32 #include <sys/kernel.h> 33 #include <sys/module.h> 34 #include <sys/bus.h> 35 #include <sys/lock.h> 36 #include <sys/mutex.h> 37 #include <sys/proc.h> 38 39 #include <dev/agp/agppriv.h> 40 #include <dev/agp/agpreg.h> 41 #include <dev/pci/pcivar.h> 42 #include <dev/pci/pcireg.h> 43 44 #include <vm/vm.h> 45 #include <vm/vm_object.h> 46 #include <vm/pmap.h> 47 48 struct agp_sis_softc { 49 struct agp_softc agp; 50 u_int32_t initial_aperture; /* aperture size at startup */ 51 struct agp_gatt *gatt; 52 }; 53 54 static const char* 55 agp_sis_match(device_t dev) 56 { 57 if (pci_get_class(dev) != PCIC_BRIDGE 58 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 59 return NULL; 60 61 if (agp_find_caps(dev) == 0) 62 return NULL; 63 64 switch (pci_get_devid(dev)) { 65 case 0x00011039: 66 return ("SiS 5591 host to AGP bridge"); 67 case 0x05301039: 68 return ("SiS 530 host to AGP bridge"); 69 case 0x05401039: 70 return ("SiS 540 host to AGP bridge"); 71 case 0x05501039: 72 return ("SiS 550 host to AGP bridge"); 73 case 0x06201039: 74 return ("SiS 620 host to AGP bridge"); 75 case 0x06301039: 76 return ("SiS 630 host to AGP bridge"); 77 case 0x06451039: 78 return ("SiS 645 host to AGP bridge"); 79 case 0x06461039: 80 return ("SiS 645DX host to AGP bridge"); 81 case 0x06481039: 82 return ("SiS 648 host to AGP bridge"); 83 case 0x06501039: 84 return ("SiS 650 host to AGP bridge"); 85 case 0x06511039: 86 return ("SiS 651 host to AGP bridge"); 87 case 0x06551039: 88 return ("SiS 655 host to AGP bridge"); 89 case 0x06611039: 90 return ("SiS 661 host to AGP bridge"); 91 case 0x07301039: 92 return ("SiS 730 host to AGP bridge"); 93 case 0x07351039: 94 return ("SiS 735 host to AGP bridge"); 95 case 0x07401039: 96 return ("SiS 740 host to AGP bridge"); 97 case 0x07411039: 98 return ("SiS 741 host to AGP bridge"); 99 case 0x07451039: 100 return ("SiS 745 host to AGP bridge"); 101 case 0x07461039: 102 return ("SiS 746 host to AGP bridge"); 103 } 104 105 return NULL; 106 } 107 108 static int 109 agp_sis_probe(device_t dev) 110 { 111 const char *desc; 112 113 if (resource_disabled("agp", device_get_unit(dev))) 114 return (ENXIO); 115 desc = agp_sis_match(dev); 116 if (desc) { 117 device_set_desc(dev, desc); 118 return BUS_PROBE_DEFAULT; 119 } 120 121 return ENXIO; 122 } 123 124 static int 125 agp_sis_attach(device_t dev) 126 { 127 struct agp_sis_softc *sc = device_get_softc(dev); 128 struct agp_gatt *gatt; 129 int error; 130 131 error = agp_generic_attach(dev); 132 if (error) 133 return error; 134 135 sc->initial_aperture = AGP_GET_APERTURE(dev); 136 137 for (;;) { 138 gatt = agp_alloc_gatt(dev); 139 if (gatt) 140 break; 141 142 /* 143 * Probably contigmalloc failure. Try reducing the 144 * aperture so that the gatt size reduces. 145 */ 146 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 147 agp_generic_detach(dev); 148 return ENOMEM; 149 } 150 } 151 sc->gatt = gatt; 152 153 /* Install the gatt. */ 154 pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4); 155 156 /* Enable the aperture. */ 157 pci_write_config(dev, AGP_SIS_WINCTRL, 158 pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1); 159 160 /* 161 * Enable the TLB and make it automatically invalidate entries 162 * when the GATT is written. 163 */ 164 pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1); 165 166 return 0; 167 } 168 169 static int 170 agp_sis_detach(device_t dev) 171 { 172 struct agp_sis_softc *sc = device_get_softc(dev); 173 174 agp_free_cdev(dev); 175 176 /* Disable the aperture.. */ 177 pci_write_config(dev, AGP_SIS_WINCTRL, 178 pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1); 179 180 /* and the TLB. */ 181 pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1); 182 183 /* Put the aperture back the way it started. */ 184 AGP_SET_APERTURE(dev, sc->initial_aperture); 185 186 agp_free_gatt(sc->gatt); 187 agp_free_res(dev); 188 return 0; 189 } 190 191 static u_int32_t 192 agp_sis_get_aperture(device_t dev) 193 { 194 int gws; 195 196 /* 197 * The aperture size is equal to 4M<<gws. 198 */ 199 gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4; 200 return (4*1024*1024) << gws; 201 } 202 203 static int 204 agp_sis_set_aperture(device_t dev, u_int32_t aperture) 205 { 206 int gws; 207 208 /* 209 * Check for a power of two and make sure its within the 210 * programmable range. 211 */ 212 if (aperture & (aperture - 1) 213 || aperture < 4*1024*1024 214 || aperture > 256*1024*1024) 215 return EINVAL; 216 217 gws = ffs(aperture / 4*1024*1024) - 1; 218 219 pci_write_config(dev, AGP_SIS_WINCTRL, 220 ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70) 221 | gws << 4), 1); 222 223 return 0; 224 } 225 226 static int 227 agp_sis_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical) 228 { 229 struct agp_sis_softc *sc = device_get_softc(dev); 230 231 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 232 return EINVAL; 233 234 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 235 return 0; 236 } 237 238 static int 239 agp_sis_unbind_page(device_t dev, vm_offset_t offset) 240 { 241 struct agp_sis_softc *sc = device_get_softc(dev); 242 243 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 244 return EINVAL; 245 246 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 247 return 0; 248 } 249 250 static void 251 agp_sis_flush_tlb(device_t dev) 252 { 253 pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1); 254 } 255 256 static device_method_t agp_sis_methods[] = { 257 /* Device interface */ 258 DEVMETHOD(device_probe, agp_sis_probe), 259 DEVMETHOD(device_attach, agp_sis_attach), 260 DEVMETHOD(device_detach, agp_sis_detach), 261 DEVMETHOD(device_shutdown, bus_generic_shutdown), 262 DEVMETHOD(device_suspend, bus_generic_suspend), 263 DEVMETHOD(device_resume, bus_generic_resume), 264 265 /* AGP interface */ 266 DEVMETHOD(agp_get_aperture, agp_sis_get_aperture), 267 DEVMETHOD(agp_set_aperture, agp_sis_set_aperture), 268 DEVMETHOD(agp_bind_page, agp_sis_bind_page), 269 DEVMETHOD(agp_unbind_page, agp_sis_unbind_page), 270 DEVMETHOD(agp_flush_tlb, agp_sis_flush_tlb), 271 DEVMETHOD(agp_enable, agp_generic_enable), 272 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 273 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 274 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 275 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 276 { 0, 0 } 277 }; 278 279 static driver_t agp_sis_driver = { 280 "agp", 281 agp_sis_methods, 282 sizeof(struct agp_sis_softc), 283 }; 284 285 DRIVER_MODULE(agp_sis, hostb, agp_sis_driver, 0, 0); 286 MODULE_DEPEND(agp_sis, agp, 1, 1, 1); 287 MODULE_DEPEND(agp_sis, pci, 1, 1, 1); 288