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 if (resource_disabled("agp", device_get_unit(dev))) 86 return (ENXIO); 87 desc = agp_sis_match(dev); 88 if (desc) { 89 device_verbose(dev); 90 device_set_desc(dev, desc); 91 return 0; 92 } 93 94 return ENXIO; 95 } 96 97 static int 98 agp_sis_attach(device_t dev) 99 { 100 struct agp_sis_softc *sc = device_get_softc(dev); 101 struct agp_gatt *gatt; 102 int error; 103 104 error = agp_generic_attach(dev); 105 if (error) 106 return error; 107 108 sc->initial_aperture = AGP_GET_APERTURE(dev); 109 110 for (;;) { 111 gatt = agp_alloc_gatt(dev); 112 if (gatt) 113 break; 114 115 /* 116 * Probably contigmalloc failure. Try reducing the 117 * aperture so that the gatt size reduces. 118 */ 119 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 120 agp_generic_detach(dev); 121 return ENOMEM; 122 } 123 } 124 sc->gatt = gatt; 125 126 /* Install the gatt. */ 127 pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4); 128 129 /* Enable the aperture. */ 130 pci_write_config(dev, AGP_SIS_WINCTRL, 131 pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1); 132 133 /* 134 * Enable the TLB and make it automatically invalidate entries 135 * when the GATT is written. 136 */ 137 pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1); 138 139 return 0; 140 } 141 142 static int 143 agp_sis_detach(device_t dev) 144 { 145 struct agp_sis_softc *sc = device_get_softc(dev); 146 int error; 147 148 error = agp_generic_detach(dev); 149 if (error) 150 return error; 151 152 /* Disable the aperture.. */ 153 pci_write_config(dev, AGP_SIS_WINCTRL, 154 pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1); 155 156 /* and the TLB. */ 157 pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1); 158 159 /* Put the aperture back the way it started. */ 160 AGP_SET_APERTURE(dev, sc->initial_aperture); 161 162 agp_free_gatt(sc->gatt); 163 return 0; 164 } 165 166 static u_int32_t 167 agp_sis_get_aperture(device_t dev) 168 { 169 int gws; 170 171 /* 172 * The aperture size is equal to 4M<<gws. 173 */ 174 gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4; 175 return (4*1024*1024) << gws; 176 } 177 178 static int 179 agp_sis_set_aperture(device_t dev, u_int32_t aperture) 180 { 181 int gws; 182 183 /* 184 * Check for a power of two and make sure its within the 185 * programmable range. 186 */ 187 if (aperture & (aperture - 1) 188 || aperture < 4*1024*1024 189 || aperture > 256*1024*1024) 190 return EINVAL; 191 192 gws = ffs(aperture / 4*1024*1024) - 1; 193 194 pci_write_config(dev, AGP_SIS_WINCTRL, 195 ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70) 196 | gws << 4), 1); 197 198 return 0; 199 } 200 201 static int 202 agp_sis_bind_page(device_t dev, int offset, vm_offset_t physical) 203 { 204 struct agp_sis_softc *sc = device_get_softc(dev); 205 206 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 207 return EINVAL; 208 209 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 210 return 0; 211 } 212 213 static int 214 agp_sis_unbind_page(device_t dev, int offset) 215 { 216 struct agp_sis_softc *sc = device_get_softc(dev); 217 218 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 219 return EINVAL; 220 221 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 222 return 0; 223 } 224 225 static void 226 agp_sis_flush_tlb(device_t dev) 227 { 228 pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1); 229 } 230 231 static device_method_t agp_sis_methods[] = { 232 /* Device interface */ 233 DEVMETHOD(device_probe, agp_sis_probe), 234 DEVMETHOD(device_attach, agp_sis_attach), 235 DEVMETHOD(device_detach, agp_sis_detach), 236 DEVMETHOD(device_shutdown, bus_generic_shutdown), 237 DEVMETHOD(device_suspend, bus_generic_suspend), 238 DEVMETHOD(device_resume, bus_generic_resume), 239 240 /* AGP interface */ 241 DEVMETHOD(agp_get_aperture, agp_sis_get_aperture), 242 DEVMETHOD(agp_set_aperture, agp_sis_set_aperture), 243 DEVMETHOD(agp_bind_page, agp_sis_bind_page), 244 DEVMETHOD(agp_unbind_page, agp_sis_unbind_page), 245 DEVMETHOD(agp_flush_tlb, agp_sis_flush_tlb), 246 DEVMETHOD(agp_enable, agp_generic_enable), 247 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 248 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 249 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 250 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 251 252 { 0, 0 } 253 }; 254 255 static driver_t agp_sis_driver = { 256 "agp", 257 agp_sis_methods, 258 sizeof(struct agp_sis_softc), 259 }; 260 261 static devclass_t agp_devclass; 262 263 DRIVER_MODULE(agp_sis, pci, agp_sis_driver, agp_devclass, 0, 0); 264 MODULE_DEPEND(agp_sis, agp, 1, 1, 1); 265 MODULE_DEPEND(agp_sis, pci, 1, 1, 1); 266