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