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 39 #include <pci/pcivar.h> 40 #include <pci/pcireg.h> 41 #include <pci/agppriv.h> 42 #include <pci/agpreg.h> 43 44 #include <vm/vm.h> 45 #include <vm/vm_object.h> 46 #include <vm/pmap.h> 47 48 struct agp_ali_softc { 49 struct agp_softc agp; 50 u_int32_t initial_aperture; /* aperture size at startup */ 51 struct agp_gatt *gatt; 52 }; 53 54 static const char* 55 agp_ali_match(device_t dev) 56 { 57 if (pci_get_class(dev) != PCIC_BRIDGE 58 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 59 return NULL; 60 61 if (agp_find_caps(dev) == 0) 62 return NULL; 63 64 switch (pci_get_devid(dev)) { 65 case 0x154110b9: 66 return ("Ali M1541 host to AGP bridge"); 67 }; 68 69 if (pci_get_vendor(dev) == 0x10b9) 70 return ("Ali Generic host to PCI bridge"); 71 72 return NULL; 73 } 74 75 static int 76 agp_ali_probe(device_t dev) 77 { 78 const char *desc; 79 80 desc = agp_ali_match(dev); 81 if (desc) { 82 device_verbose(dev); 83 device_set_desc(dev, desc); 84 return 0; 85 } 86 87 return ENXIO; 88 } 89 90 static int 91 agp_ali_attach(device_t dev) 92 { 93 struct agp_ali_softc *sc = device_get_softc(dev); 94 struct agp_gatt *gatt; 95 int error; 96 97 error = agp_generic_attach(dev); 98 if (error) 99 return error; 100 101 sc->initial_aperture = AGP_GET_APERTURE(dev); 102 103 for (;;) { 104 gatt = agp_alloc_gatt(dev); 105 if (gatt) 106 break; 107 108 /* 109 * Probably contigmalloc failure. Try reducing the 110 * aperture so that the gatt size reduces. 111 */ 112 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 113 agp_generic_detach(dev); 114 return ENOMEM; 115 } 116 } 117 sc->gatt = gatt; 118 119 /* Install the gatt. */ 120 pci_write_config(dev, AGP_ALI_ATTBASE, 121 (gatt->ag_physical 122 | (pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff)), 123 4); 124 125 /* Enable the TLB. */ 126 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1); 127 128 return 0; 129 } 130 131 static int 132 agp_ali_detach(device_t dev) 133 { 134 struct agp_ali_softc *sc = device_get_softc(dev); 135 int error; 136 137 error = agp_generic_detach(dev); 138 if (error) 139 return error; 140 141 /* Disable the TLB.. */ 142 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1); 143 144 /* Put the aperture back the way it started. */ 145 AGP_SET_APERTURE(dev, sc->initial_aperture); 146 pci_write_config(dev, AGP_ALI_ATTBASE, 147 pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff, 148 4); 149 150 agp_free_gatt(sc->gatt); 151 return 0; 152 } 153 154 #define M 1024*1024 155 156 static u_int32_t agp_ali_table[] = { 157 0, /* 0 - invalid */ 158 1, /* 1 - invalid */ 159 2, /* 2 - invalid */ 160 4*M, /* 3 - invalid */ 161 8*M, /* 4 - invalid */ 162 0, /* 5 - invalid */ 163 16*M, /* 6 - invalid */ 164 32*M, /* 7 - invalid */ 165 64*M, /* 8 - invalid */ 166 128*M, /* 9 - invalid */ 167 256*M, /* 10 - invalid */ 168 }; 169 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0])) 170 171 static u_int32_t 172 agp_ali_get_aperture(device_t dev) 173 { 174 /* 175 * The aperture size is derived from the low bits of attbase. 176 * I'm not sure this is correct.. 177 */ 178 int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff; 179 if (i >= agp_ali_table_size) 180 return 0; 181 return agp_ali_table[i]; 182 } 183 184 static int 185 agp_ali_set_aperture(device_t dev, u_int32_t aperture) 186 { 187 int i; 188 189 for (i = 0; i < agp_ali_table_size; i++) 190 if (agp_ali_table[i] == aperture) 191 break; 192 if (i == agp_ali_table_size) 193 return EINVAL; 194 195 pci_write_config(dev, AGP_ALI_ATTBASE, 196 ((pci_read_config(dev, AGP_ALI_ATTBASE, 4) & ~0xff) 197 | i), 4); 198 return 0; 199 } 200 201 static int 202 agp_ali_bind_page(device_t dev, int offset, vm_offset_t physical) 203 { 204 struct agp_ali_softc *sc = device_get_softc(dev); 205 206 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 207 return EINVAL; 208 209 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 210 return 0; 211 } 212 213 static int 214 agp_ali_unbind_page(device_t dev, int offset) 215 { 216 struct agp_ali_softc *sc = device_get_softc(dev); 217 218 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 219 return EINVAL; 220 221 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 222 return 0; 223 } 224 225 static void 226 agp_ali_flush_tlb(device_t dev) 227 { 228 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1); 229 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1); 230 } 231 232 static device_method_t agp_ali_methods[] = { 233 /* Device interface */ 234 DEVMETHOD(device_probe, agp_ali_probe), 235 DEVMETHOD(device_attach, agp_ali_attach), 236 DEVMETHOD(device_detach, agp_ali_detach), 237 DEVMETHOD(device_shutdown, bus_generic_shutdown), 238 DEVMETHOD(device_suspend, bus_generic_suspend), 239 DEVMETHOD(device_resume, bus_generic_resume), 240 241 /* AGP interface */ 242 DEVMETHOD(agp_get_aperture, agp_ali_get_aperture), 243 DEVMETHOD(agp_set_aperture, agp_ali_set_aperture), 244 DEVMETHOD(agp_bind_page, agp_ali_bind_page), 245 DEVMETHOD(agp_unbind_page, agp_ali_unbind_page), 246 DEVMETHOD(agp_flush_tlb, agp_ali_flush_tlb), 247 DEVMETHOD(agp_enable, agp_generic_enable), 248 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 249 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 250 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 251 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 252 253 { 0, 0 } 254 }; 255 256 static driver_t agp_ali_driver = { 257 "agp", 258 agp_ali_methods, 259 sizeof(struct agp_ali_softc), 260 }; 261 262 static devclass_t agp_devclass; 263 264 DRIVER_MODULE(agp_ali, pci, agp_ali_driver, agp_devclass, 0, 0); 265