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 * $FreeBSD$ 27 */ 28 29 #include "opt_bus.h" 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/malloc.h> 34 #include <sys/kernel.h> 35 #include <sys/bus.h> 36 #include <sys/lock.h> 37 #include <sys/lockmgr.h> 38 #include <sys/mutex.h> 39 #include <sys/proc.h> 40 41 #include <pci/pcivar.h> 42 #include <pci/pcireg.h> 43 #include <pci/agppriv.h> 44 #include <pci/agpreg.h> 45 46 #include <vm/vm.h> 47 #include <vm/vm_object.h> 48 #include <vm/pmap.h> 49 50 struct agp_sis_softc { 51 struct agp_softc agp; 52 u_int32_t initial_aperture; /* aperture size at startup */ 53 struct agp_gatt *gatt; 54 }; 55 56 static const char* 57 agp_sis_match(device_t dev) 58 { 59 if (pci_get_class(dev) != PCIC_BRIDGE 60 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 61 return NULL; 62 63 if (agp_find_caps(dev) == 0) 64 return NULL; 65 66 switch (pci_get_devid(dev)) { 67 case 0x00011039: 68 return ("SiS 5591 host to AGP bridge"); 69 case 0x06481039: 70 return ("SiS 648 host to AGP bridge"); 71 }; 72 73 if (pci_get_vendor(dev) == 0x1039) 74 return ("SIS Generic host to PCI bridge"); 75 76 return NULL; 77 } 78 79 static int 80 agp_sis_probe(device_t dev) 81 { 82 const char *desc; 83 84 desc = agp_sis_match(dev); 85 if (desc) { 86 device_verbose(dev); 87 device_set_desc(dev, desc); 88 return 0; 89 } 90 91 return ENXIO; 92 } 93 94 static int 95 agp_sis_attach(device_t dev) 96 { 97 struct agp_sis_softc *sc = device_get_softc(dev); 98 struct agp_gatt *gatt; 99 int error; 100 101 error = agp_generic_attach(dev); 102 if (error) 103 return error; 104 105 sc->initial_aperture = AGP_GET_APERTURE(dev); 106 107 for (;;) { 108 gatt = agp_alloc_gatt(dev); 109 if (gatt) 110 break; 111 112 /* 113 * Probably contigmalloc failure. Try reducing the 114 * aperture so that the gatt size reduces. 115 */ 116 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 117 agp_generic_detach(dev); 118 return ENOMEM; 119 } 120 } 121 sc->gatt = gatt; 122 123 /* Install the gatt. */ 124 pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4); 125 126 /* Enable the aperture. */ 127 pci_write_config(dev, AGP_SIS_WINCTRL, 128 pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1); 129 130 /* 131 * Enable the TLB and make it automatically invalidate entries 132 * when the GATT is written. 133 */ 134 pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1); 135 136 return 0; 137 } 138 139 static int 140 agp_sis_detach(device_t dev) 141 { 142 struct agp_sis_softc *sc = device_get_softc(dev); 143 int error; 144 145 error = agp_generic_detach(dev); 146 if (error) 147 return error; 148 149 /* Disable the aperture.. */ 150 pci_write_config(dev, AGP_SIS_WINCTRL, 151 pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1); 152 153 /* and the TLB. */ 154 pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1); 155 156 /* Put the aperture back the way it started. */ 157 AGP_SET_APERTURE(dev, sc->initial_aperture); 158 159 agp_free_gatt(sc->gatt); 160 return 0; 161 } 162 163 static u_int32_t 164 agp_sis_get_aperture(device_t dev) 165 { 166 int gws; 167 168 /* 169 * The aperture size is equal to 4M<<gws. 170 */ 171 gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4; 172 return (4*1024*1024) << gws; 173 } 174 175 static int 176 agp_sis_set_aperture(device_t dev, u_int32_t aperture) 177 { 178 int gws; 179 180 /* 181 * Check for a power of two and make sure its within the 182 * programmable range. 183 */ 184 if (aperture & (aperture - 1) 185 || aperture < 4*1024*1024 186 || aperture > 256*1024*1024) 187 return EINVAL; 188 189 gws = ffs(aperture / 4*1024*1024) - 1; 190 191 pci_write_config(dev, AGP_SIS_WINCTRL, 192 ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70) 193 | gws << 4), 1); 194 195 return 0; 196 } 197 198 static int 199 agp_sis_bind_page(device_t dev, int offset, vm_offset_t physical) 200 { 201 struct agp_sis_softc *sc = device_get_softc(dev); 202 203 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 204 return EINVAL; 205 206 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 207 return 0; 208 } 209 210 static int 211 agp_sis_unbind_page(device_t dev, int offset) 212 { 213 struct agp_sis_softc *sc = device_get_softc(dev); 214 215 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 216 return EINVAL; 217 218 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 219 return 0; 220 } 221 222 static void 223 agp_sis_flush_tlb(device_t dev) 224 { 225 pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1); 226 } 227 228 static device_method_t agp_sis_methods[] = { 229 /* Device interface */ 230 DEVMETHOD(device_probe, agp_sis_probe), 231 DEVMETHOD(device_attach, agp_sis_attach), 232 DEVMETHOD(device_detach, agp_sis_detach), 233 DEVMETHOD(device_shutdown, bus_generic_shutdown), 234 DEVMETHOD(device_suspend, bus_generic_suspend), 235 DEVMETHOD(device_resume, bus_generic_resume), 236 237 /* AGP interface */ 238 DEVMETHOD(agp_get_aperture, agp_sis_get_aperture), 239 DEVMETHOD(agp_set_aperture, agp_sis_set_aperture), 240 DEVMETHOD(agp_bind_page, agp_sis_bind_page), 241 DEVMETHOD(agp_unbind_page, agp_sis_unbind_page), 242 DEVMETHOD(agp_flush_tlb, agp_sis_flush_tlb), 243 DEVMETHOD(agp_enable, agp_generic_enable), 244 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 245 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 246 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 247 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 248 249 { 0, 0 } 250 }; 251 252 static driver_t agp_sis_driver = { 253 "agp", 254 agp_sis_methods, 255 sizeof(struct agp_sis_softc), 256 }; 257 258 static devclass_t agp_devclass; 259 260 DRIVER_MODULE(agp_sis, pci, agp_sis_driver, agp_devclass, 0, 0); 261