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