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/bus.h> 37 #include <sys/lock.h> 38 #include <sys/mutex.h> 39 #include <sys/proc.h> 40 41 #include <dev/pci/pcivar.h> 42 #include <dev/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_ali_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_ali_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 0x154110b9: 68 return ("Ali M1541 host to AGP bridge"); 69 }; 70 71 if (pci_get_vendor(dev) == 0x10b9) 72 return ("Ali Generic host to PCI bridge"); 73 74 return NULL; 75 } 76 77 static int 78 agp_ali_probe(device_t dev) 79 { 80 const char *desc; 81 82 if (resource_disabled("agp", device_get_unit(dev))) 83 return (ENXIO); 84 desc = agp_ali_match(dev); 85 if (desc) { 86 device_verbose(dev); 87 device_set_desc(dev, desc); 88 return 0; 89 } 90 91 return ENXIO; 92 } 93 94 static int 95 agp_ali_attach(device_t dev) 96 { 97 struct agp_ali_softc *sc = device_get_softc(dev); 98 struct agp_gatt *gatt; 99 int error; 100 101 error = agp_generic_attach(dev); 102 if (error) 103 return error; 104 105 sc->initial_aperture = AGP_GET_APERTURE(dev); 106 if (sc->initial_aperture == 0) { 107 device_printf(dev, "bad initial aperture size, disabling\n"); 108 return ENXIO; 109 } 110 111 for (;;) { 112 gatt = agp_alloc_gatt(dev); 113 if (gatt) 114 break; 115 116 /* 117 * Probably contigmalloc failure. Try reducing the 118 * aperture so that the gatt size reduces. 119 */ 120 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 121 agp_generic_detach(dev); 122 return ENOMEM; 123 } 124 } 125 sc->gatt = gatt; 126 127 /* Install the gatt. */ 128 pci_write_config(dev, AGP_ALI_ATTBASE, 129 (gatt->ag_physical 130 | (pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff)), 131 4); 132 133 /* Enable the TLB. */ 134 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1); 135 136 return 0; 137 } 138 139 static int 140 agp_ali_detach(device_t dev) 141 { 142 struct agp_ali_softc *sc = device_get_softc(dev); 143 int error; 144 145 error = agp_generic_detach(dev); 146 if (error) 147 return error; 148 149 /* Disable the TLB.. */ 150 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1); 151 152 /* Put the aperture back the way it started. */ 153 AGP_SET_APERTURE(dev, sc->initial_aperture); 154 pci_write_config(dev, AGP_ALI_ATTBASE, 155 pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff, 156 4); 157 158 agp_free_gatt(sc->gatt); 159 return 0; 160 } 161 162 #define M 1024*1024 163 164 static u_int32_t agp_ali_table[] = { 165 0, /* 0 - invalid */ 166 1, /* 1 - invalid */ 167 2, /* 2 - invalid */ 168 4*M, /* 3 - invalid */ 169 8*M, /* 4 - invalid */ 170 0, /* 5 - invalid */ 171 16*M, /* 6 - invalid */ 172 32*M, /* 7 - invalid */ 173 64*M, /* 8 - invalid */ 174 128*M, /* 9 - invalid */ 175 256*M, /* 10 - invalid */ 176 }; 177 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0])) 178 179 static u_int32_t 180 agp_ali_get_aperture(device_t dev) 181 { 182 /* 183 * The aperture size is derived from the low bits of attbase. 184 * I'm not sure this is correct.. 185 */ 186 int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff; 187 if (i >= agp_ali_table_size) 188 return 0; 189 return agp_ali_table[i]; 190 } 191 192 static int 193 agp_ali_set_aperture(device_t dev, u_int32_t aperture) 194 { 195 int i; 196 197 for (i = 0; i < agp_ali_table_size; i++) 198 if (agp_ali_table[i] == aperture) 199 break; 200 if (i == agp_ali_table_size) 201 return EINVAL; 202 203 pci_write_config(dev, AGP_ALI_ATTBASE, 204 ((pci_read_config(dev, AGP_ALI_ATTBASE, 4) & ~0xff) 205 | i), 4); 206 return 0; 207 } 208 209 static int 210 agp_ali_bind_page(device_t dev, int offset, vm_offset_t physical) 211 { 212 struct agp_ali_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] = physical; 218 return 0; 219 } 220 221 static int 222 agp_ali_unbind_page(device_t dev, int offset) 223 { 224 struct agp_ali_softc *sc = device_get_softc(dev); 225 226 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 227 return EINVAL; 228 229 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 230 return 0; 231 } 232 233 static void 234 agp_ali_flush_tlb(device_t dev) 235 { 236 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1); 237 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1); 238 } 239 240 static device_method_t agp_ali_methods[] = { 241 /* Device interface */ 242 DEVMETHOD(device_probe, agp_ali_probe), 243 DEVMETHOD(device_attach, agp_ali_attach), 244 DEVMETHOD(device_detach, agp_ali_detach), 245 DEVMETHOD(device_shutdown, bus_generic_shutdown), 246 DEVMETHOD(device_suspend, bus_generic_suspend), 247 DEVMETHOD(device_resume, bus_generic_resume), 248 249 /* AGP interface */ 250 DEVMETHOD(agp_get_aperture, agp_ali_get_aperture), 251 DEVMETHOD(agp_set_aperture, agp_ali_set_aperture), 252 DEVMETHOD(agp_bind_page, agp_ali_bind_page), 253 DEVMETHOD(agp_unbind_page, agp_ali_unbind_page), 254 DEVMETHOD(agp_flush_tlb, agp_ali_flush_tlb), 255 DEVMETHOD(agp_enable, agp_generic_enable), 256 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 257 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 258 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 259 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 260 261 { 0, 0 } 262 }; 263 264 static driver_t agp_ali_driver = { 265 "agp", 266 agp_ali_methods, 267 sizeof(struct agp_ali_softc), 268 }; 269 270 static devclass_t agp_devclass; 271 272 DRIVER_MODULE(agp_ali, pci, agp_ali_driver, agp_devclass, 0, 0); 273 MODULE_DEPEND(agp_ali, agp, 1, 1, 1); 274 MODULE_DEPEND(agp_ali, pci, 1, 1, 1); 275