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 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include "opt_bus.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/module.h> 37 #include <sys/bus.h> 38 #include <sys/lock.h> 39 #include <sys/mutex.h> 40 #include <sys/proc.h> 41 42 #include <dev/pci/pcivar.h> 43 #include <dev/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_ali_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_ali_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 0x154110b9: 69 return ("Ali M1541 host to AGP bridge"); 70 }; 71 72 if (pci_get_vendor(dev) == 0x10b9) 73 return ("Ali Generic host to PCI bridge"); 74 75 return NULL; 76 } 77 78 static int 79 agp_ali_probe(device_t dev) 80 { 81 const char *desc; 82 83 if (resource_disabled("agp", device_get_unit(dev))) 84 return (ENXIO); 85 desc = agp_ali_match(dev); 86 if (desc) { 87 device_verbose(dev); 88 device_set_desc(dev, desc); 89 return 0; 90 } 91 92 return ENXIO; 93 } 94 95 static int 96 agp_ali_attach(device_t dev) 97 { 98 struct agp_ali_softc *sc = device_get_softc(dev); 99 struct agp_gatt *gatt; 100 int error; 101 102 error = agp_generic_attach(dev); 103 if (error) 104 return error; 105 106 sc->initial_aperture = AGP_GET_APERTURE(dev); 107 if (sc->initial_aperture == 0) { 108 device_printf(dev, "bad initial aperture size, disabling\n"); 109 return ENXIO; 110 } 111 112 for (;;) { 113 gatt = agp_alloc_gatt(dev); 114 if (gatt) 115 break; 116 117 /* 118 * Probably contigmalloc failure. Try reducing the 119 * aperture so that the gatt size reduces. 120 */ 121 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 122 agp_generic_detach(dev); 123 return ENOMEM; 124 } 125 } 126 sc->gatt = gatt; 127 128 /* Install the gatt. */ 129 pci_write_config(dev, AGP_ALI_ATTBASE, 130 (gatt->ag_physical 131 | (pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff)), 132 4); 133 134 /* Enable the TLB. */ 135 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1); 136 137 return 0; 138 } 139 140 static int 141 agp_ali_detach(device_t dev) 142 { 143 struct agp_ali_softc *sc = device_get_softc(dev); 144 int error; 145 146 error = agp_generic_detach(dev); 147 if (error) 148 return error; 149 150 /* Disable the TLB.. */ 151 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1); 152 153 /* Put the aperture back the way it started. */ 154 AGP_SET_APERTURE(dev, sc->initial_aperture); 155 pci_write_config(dev, AGP_ALI_ATTBASE, 156 pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff, 157 4); 158 159 agp_free_gatt(sc->gatt); 160 return 0; 161 } 162 163 #define M 1024*1024 164 165 static u_int32_t agp_ali_table[] = { 166 0, /* 0 - invalid */ 167 1, /* 1 - invalid */ 168 2, /* 2 - invalid */ 169 4*M, /* 3 - invalid */ 170 8*M, /* 4 - invalid */ 171 0, /* 5 - invalid */ 172 16*M, /* 6 - invalid */ 173 32*M, /* 7 - invalid */ 174 64*M, /* 8 - invalid */ 175 128*M, /* 9 - invalid */ 176 256*M, /* 10 - invalid */ 177 }; 178 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0])) 179 180 static u_int32_t 181 agp_ali_get_aperture(device_t dev) 182 { 183 /* 184 * The aperture size is derived from the low bits of attbase. 185 * I'm not sure this is correct.. 186 */ 187 int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff; 188 if (i >= agp_ali_table_size) 189 return 0; 190 return agp_ali_table[i]; 191 } 192 193 static int 194 agp_ali_set_aperture(device_t dev, u_int32_t aperture) 195 { 196 int i; 197 198 for (i = 0; i < agp_ali_table_size; i++) 199 if (agp_ali_table[i] == aperture) 200 break; 201 if (i == agp_ali_table_size) 202 return EINVAL; 203 204 pci_write_config(dev, AGP_ALI_ATTBASE, 205 ((pci_read_config(dev, AGP_ALI_ATTBASE, 4) & ~0xff) 206 | i), 4); 207 return 0; 208 } 209 210 static int 211 agp_ali_bind_page(device_t dev, int offset, vm_offset_t physical) 212 { 213 struct agp_ali_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] = physical; 219 return 0; 220 } 221 222 static int 223 agp_ali_unbind_page(device_t dev, int offset) 224 { 225 struct agp_ali_softc *sc = device_get_softc(dev); 226 227 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 228 return EINVAL; 229 230 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 231 return 0; 232 } 233 234 static void 235 agp_ali_flush_tlb(device_t dev) 236 { 237 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1); 238 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1); 239 } 240 241 static device_method_t agp_ali_methods[] = { 242 /* Device interface */ 243 DEVMETHOD(device_probe, agp_ali_probe), 244 DEVMETHOD(device_attach, agp_ali_attach), 245 DEVMETHOD(device_detach, agp_ali_detach), 246 DEVMETHOD(device_shutdown, bus_generic_shutdown), 247 DEVMETHOD(device_suspend, bus_generic_suspend), 248 DEVMETHOD(device_resume, bus_generic_resume), 249 250 /* AGP interface */ 251 DEVMETHOD(agp_get_aperture, agp_ali_get_aperture), 252 DEVMETHOD(agp_set_aperture, agp_ali_set_aperture), 253 DEVMETHOD(agp_bind_page, agp_ali_bind_page), 254 DEVMETHOD(agp_unbind_page, agp_ali_unbind_page), 255 DEVMETHOD(agp_flush_tlb, agp_ali_flush_tlb), 256 DEVMETHOD(agp_enable, agp_generic_enable), 257 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 258 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 259 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 260 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 261 262 { 0, 0 } 263 }; 264 265 static driver_t agp_ali_driver = { 266 "agp", 267 agp_ali_methods, 268 sizeof(struct agp_ali_softc), 269 }; 270 271 static devclass_t agp_devclass; 272 273 DRIVER_MODULE(agp_ali, pci, agp_ali_driver, agp_devclass, 0, 0); 274 MODULE_DEPEND(agp_ali, agp, 1, 1, 1); 275 MODULE_DEPEND(agp_ali, pci, 1, 1, 1); 276