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 "opt_bus.h" 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/malloc.h> 35 #include <sys/kernel.h> 36 #include <sys/bus.h> 37 #include <sys/lock.h> 38 #include <sys/lockmgr.h> 39 #include <sys/mutex.h> 40 #include <sys/proc.h> 41 42 #include <dev/pci/pcivar.h> 43 #include <dev/pci/pcireg.h> 44 #include <pci/agppriv.h> 45 #include <pci/agpreg.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 0x06481039: 71 return ("SiS 648 host to AGP bridge"); 72 }; 73 74 if (pci_get_vendor(dev) == 0x1039) 75 return ("SIS Generic host to PCI bridge"); 76 77 return NULL; 78 } 79 80 static int 81 agp_sis_probe(device_t dev) 82 { 83 const char *desc; 84 85 desc = agp_sis_match(dev); 86 if (desc) { 87 device_verbose(dev); 88 device_set_desc(dev, desc); 89 return 0; 90 } 91 92 return ENXIO; 93 } 94 95 static int 96 agp_sis_attach(device_t dev) 97 { 98 struct agp_sis_softc *sc = device_get_softc(dev); 99 struct agp_gatt *gatt; 100 int error; 101 102 error = agp_generic_attach(dev); 103 if (error) 104 return error; 105 106 sc->initial_aperture = AGP_GET_APERTURE(dev); 107 108 for (;;) { 109 gatt = agp_alloc_gatt(dev); 110 if (gatt) 111 break; 112 113 /* 114 * Probably contigmalloc failure. Try reducing the 115 * aperture so that the gatt size reduces. 116 */ 117 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 118 agp_generic_detach(dev); 119 return ENOMEM; 120 } 121 } 122 sc->gatt = gatt; 123 124 /* Install the gatt. */ 125 pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4); 126 127 /* Enable the aperture. */ 128 pci_write_config(dev, AGP_SIS_WINCTRL, 129 pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1); 130 131 /* 132 * Enable the TLB and make it automatically invalidate entries 133 * when the GATT is written. 134 */ 135 pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1); 136 137 return 0; 138 } 139 140 static int 141 agp_sis_detach(device_t dev) 142 { 143 struct agp_sis_softc *sc = device_get_softc(dev); 144 int error; 145 146 error = agp_generic_detach(dev); 147 if (error) 148 return error; 149 150 /* Disable the aperture.. */ 151 pci_write_config(dev, AGP_SIS_WINCTRL, 152 pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1); 153 154 /* and the TLB. */ 155 pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1); 156 157 /* Put the aperture back the way it started. */ 158 AGP_SET_APERTURE(dev, sc->initial_aperture); 159 160 agp_free_gatt(sc->gatt); 161 return 0; 162 } 163 164 static u_int32_t 165 agp_sis_get_aperture(device_t dev) 166 { 167 int gws; 168 169 /* 170 * The aperture size is equal to 4M<<gws. 171 */ 172 gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4; 173 return (4*1024*1024) << gws; 174 } 175 176 static int 177 agp_sis_set_aperture(device_t dev, u_int32_t aperture) 178 { 179 int gws; 180 181 /* 182 * Check for a power of two and make sure its within the 183 * programmable range. 184 */ 185 if (aperture & (aperture - 1) 186 || aperture < 4*1024*1024 187 || aperture > 256*1024*1024) 188 return EINVAL; 189 190 gws = ffs(aperture / 4*1024*1024) - 1; 191 192 pci_write_config(dev, AGP_SIS_WINCTRL, 193 ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70) 194 | gws << 4), 1); 195 196 return 0; 197 } 198 199 static int 200 agp_sis_bind_page(device_t dev, int offset, vm_offset_t physical) 201 { 202 struct agp_sis_softc *sc = device_get_softc(dev); 203 204 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 205 return EINVAL; 206 207 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 208 return 0; 209 } 210 211 static int 212 agp_sis_unbind_page(device_t dev, int offset) 213 { 214 struct agp_sis_softc *sc = device_get_softc(dev); 215 216 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 217 return EINVAL; 218 219 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 220 return 0; 221 } 222 223 static void 224 agp_sis_flush_tlb(device_t dev) 225 { 226 pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1); 227 } 228 229 static device_method_t agp_sis_methods[] = { 230 /* Device interface */ 231 DEVMETHOD(device_probe, agp_sis_probe), 232 DEVMETHOD(device_attach, agp_sis_attach), 233 DEVMETHOD(device_detach, agp_sis_detach), 234 DEVMETHOD(device_shutdown, bus_generic_shutdown), 235 DEVMETHOD(device_suspend, bus_generic_suspend), 236 DEVMETHOD(device_resume, bus_generic_resume), 237 238 /* AGP interface */ 239 DEVMETHOD(agp_get_aperture, agp_sis_get_aperture), 240 DEVMETHOD(agp_set_aperture, agp_sis_set_aperture), 241 DEVMETHOD(agp_bind_page, agp_sis_bind_page), 242 DEVMETHOD(agp_unbind_page, agp_sis_unbind_page), 243 DEVMETHOD(agp_flush_tlb, agp_sis_flush_tlb), 244 DEVMETHOD(agp_enable, agp_generic_enable), 245 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 246 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 247 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 248 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 249 250 { 0, 0 } 251 }; 252 253 static driver_t agp_sis_driver = { 254 "agp", 255 agp_sis_methods, 256 sizeof(struct agp_sis_softc), 257 }; 258 259 static devclass_t agp_devclass; 260 261 DRIVER_MODULE(agp_sis, pci, agp_sis_driver, agp_devclass, 0, 0); 262 MODULE_DEPEND(agp_sis, agp, 1, 1, 1); 263 MODULE_DEPEND(agp_sis, pci, 1, 1, 1); 264