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 case 0x162110b9: 71 return ("Ali M1621 host to AGP bridge"); 72 }; 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 u_int32_t attbase; 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 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4); 130 pci_write_config(dev, AGP_ALI_ATTBASE, gatt->ag_physical | 131 (attbase & 0xfff), 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 u_int32_t attbase; 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 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4); 156 pci_write_config(dev, AGP_ALI_ATTBASE, attbase & 0xfff, 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) & 0xf; 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 u_int32_t attbase; 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 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4); 205 pci_write_config(dev, AGP_ALI_ATTBASE, (attbase & ~0xf) | 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