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