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: src/sys/pci/agp_sis.c,v 1.1.2.1 2000/07/19 09:48:04 ru Exp $ 27 * $DragonFly: src/sys/dev/agp/agp_sis.c,v 1.2 2003/06/17 04:28:56 dillon Exp $ 28 */ 29 30 #include "opt_bus.h" 31 #include "opt_pci.h" 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/malloc.h> 36 #include <sys/kernel.h> 37 #include <sys/bus.h> 38 #include <sys/lock.h> 39 40 #include <pci/pcivar.h> 41 #include <pci/pcireg.h> 42 #include <pci/agppriv.h> 43 #include <pci/agpreg.h> 44 45 #include <vm/vm.h> 46 #include <vm/vm_object.h> 47 #include <vm/pmap.h> 48 49 struct 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 55 static const char* 56 agp_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 }; 69 70 if (pci_get_vendor(dev) == 0x1039) 71 return ("SIS Generic host to PCI bridge"); 72 73 return NULL; 74 } 75 76 static int 77 agp_sis_probe(device_t dev) 78 { 79 const char *desc; 80 81 desc = agp_sis_match(dev); 82 if (desc) { 83 device_verbose(dev); 84 device_set_desc(dev, desc); 85 return 0; 86 } 87 88 return ENXIO; 89 } 90 91 static int 92 agp_sis_attach(device_t dev) 93 { 94 struct agp_sis_softc *sc = device_get_softc(dev); 95 struct agp_gatt *gatt; 96 int error; 97 98 error = agp_generic_attach(dev); 99 if (error) 100 return error; 101 102 sc->initial_aperture = AGP_GET_APERTURE(dev); 103 104 for (;;) { 105 gatt = agp_alloc_gatt(dev); 106 if (gatt) 107 break; 108 109 /* 110 * Probably contigmalloc failure. Try reducing the 111 * aperture so that the gatt size reduces. 112 */ 113 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 114 agp_generic_detach(dev); 115 return ENOMEM; 116 } 117 } 118 sc->gatt = gatt; 119 120 /* Install the gatt. */ 121 pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4); 122 123 /* Enable the aperture. */ 124 pci_write_config(dev, AGP_SIS_WINCTRL, 125 pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1); 126 127 /* 128 * Enable the TLB and make it automatically invalidate entries 129 * when the GATT is written. 130 */ 131 pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1); 132 133 return 0; 134 } 135 136 static int 137 agp_sis_detach(device_t dev) 138 { 139 struct agp_sis_softc *sc = device_get_softc(dev); 140 int error; 141 142 error = agp_generic_detach(dev); 143 if (error) 144 return error; 145 146 /* Disable the aperture.. */ 147 pci_write_config(dev, AGP_SIS_WINCTRL, 148 pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1); 149 150 /* and the TLB. */ 151 pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1); 152 153 /* Put the aperture back the way it started. */ 154 AGP_SET_APERTURE(dev, sc->initial_aperture); 155 156 agp_free_gatt(sc->gatt); 157 return 0; 158 } 159 160 static u_int32_t 161 agp_sis_get_aperture(device_t dev) 162 { 163 int gws; 164 165 /* 166 * The aperture size is equal to 4M<<gws. 167 */ 168 gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4; 169 return (4*1024*1024) << gws; 170 } 171 172 static int 173 agp_sis_set_aperture(device_t dev, u_int32_t aperture) 174 { 175 int gws; 176 177 /* 178 * Check for a power of two and make sure its within the 179 * programmable range. 180 */ 181 if (aperture & (aperture - 1) 182 || aperture < 4*1024*1024 183 || aperture > 256*1024*1024) 184 return EINVAL; 185 186 gws = ffs(aperture / 4*1024*1024) - 1; 187 188 pci_write_config(dev, AGP_SIS_WINCTRL, 189 ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70) 190 | gws << 4), 1); 191 192 return 0; 193 } 194 195 static int 196 agp_sis_bind_page(device_t dev, int offset, vm_offset_t physical) 197 { 198 struct agp_sis_softc *sc = device_get_softc(dev); 199 200 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 201 return EINVAL; 202 203 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 204 return 0; 205 } 206 207 static int 208 agp_sis_unbind_page(device_t dev, int offset) 209 { 210 struct agp_sis_softc *sc = device_get_softc(dev); 211 212 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 213 return EINVAL; 214 215 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 216 return 0; 217 } 218 219 static void 220 agp_sis_flush_tlb(device_t dev) 221 { 222 pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1); 223 } 224 225 static device_method_t agp_sis_methods[] = { 226 /* Device interface */ 227 DEVMETHOD(device_probe, agp_sis_probe), 228 DEVMETHOD(device_attach, agp_sis_attach), 229 DEVMETHOD(device_detach, agp_sis_detach), 230 DEVMETHOD(device_shutdown, bus_generic_shutdown), 231 DEVMETHOD(device_suspend, bus_generic_suspend), 232 DEVMETHOD(device_resume, bus_generic_resume), 233 234 /* AGP interface */ 235 DEVMETHOD(agp_get_aperture, agp_sis_get_aperture), 236 DEVMETHOD(agp_set_aperture, agp_sis_set_aperture), 237 DEVMETHOD(agp_bind_page, agp_sis_bind_page), 238 DEVMETHOD(agp_unbind_page, agp_sis_unbind_page), 239 DEVMETHOD(agp_flush_tlb, agp_sis_flush_tlb), 240 DEVMETHOD(agp_enable, agp_generic_enable), 241 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 242 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 243 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 244 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 245 246 { 0, 0 } 247 }; 248 249 static driver_t agp_sis_driver = { 250 "agp", 251 agp_sis_methods, 252 sizeof(struct agp_sis_softc), 253 }; 254 255 static devclass_t agp_devclass; 256 257 DRIVER_MODULE(agp_sis, pci, agp_sis_driver, agp_devclass, 0, 0); 258