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 40 #include <pci/pcivar.h> 41 #include <pci/pcireg.h> 42 #include <pci/agppriv.h> 43 #include <pci/agpreg.h> 44 45 #include <vm/vm.h> 46 #include <vm/vm_object.h> 47 #include <vm/pmap.h> 48 49 struct agp_ali_softc { 50 struct agp_softc agp; 51 u_int32_t initial_aperture; /* aperture size at startup */ 52 struct agp_gatt *gatt; 53 }; 54 55 static const char* 56 agp_ali_match(device_t dev) 57 { 58 if (pci_get_class(dev) != PCIC_BRIDGE 59 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 60 return NULL; 61 62 if (agp_find_caps(dev) == 0) 63 return NULL; 64 65 switch (pci_get_devid(dev)) { 66 case 0x154110b9: 67 return ("Ali M1541 host to AGP bridge"); 68 }; 69 70 if (pci_get_vendor(dev) == 0x10b9) 71 return ("Ali Generic host to PCI bridge"); 72 73 return NULL; 74 } 75 76 static int 77 agp_ali_probe(device_t dev) 78 { 79 const char *desc; 80 81 desc = agp_ali_match(dev); 82 if (desc) { 83 device_verbose(dev); 84 device_set_desc(dev, desc); 85 return 0; 86 } 87 88 return ENXIO; 89 } 90 91 static int 92 agp_ali_attach(device_t dev) 93 { 94 struct agp_ali_softc *sc = device_get_softc(dev); 95 struct agp_gatt *gatt; 96 int error; 97 98 error = agp_generic_attach(dev); 99 if (error) 100 return error; 101 102 sc->initial_aperture = AGP_GET_APERTURE(dev); 103 104 for (;;) { 105 gatt = agp_alloc_gatt(dev); 106 if (gatt) 107 break; 108 109 /* 110 * Probably contigmalloc failure. Try reducing the 111 * aperture so that the gatt size reduces. 112 */ 113 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 114 agp_generic_detach(dev); 115 return ENOMEM; 116 } 117 } 118 sc->gatt = gatt; 119 120 /* Install the gatt. */ 121 pci_write_config(dev, AGP_ALI_ATTBASE, 122 (gatt->ag_physical 123 | (pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff)), 124 4); 125 126 /* Enable the TLB. */ 127 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1); 128 129 return 0; 130 } 131 132 static int 133 agp_ali_detach(device_t dev) 134 { 135 struct agp_ali_softc *sc = device_get_softc(dev); 136 int error; 137 138 error = agp_generic_detach(dev); 139 if (error) 140 return error; 141 142 /* Disable the TLB.. */ 143 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1); 144 145 /* Put the aperture back the way it started. */ 146 AGP_SET_APERTURE(dev, sc->initial_aperture); 147 pci_write_config(dev, AGP_ALI_ATTBASE, 148 pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff, 149 4); 150 151 agp_free_gatt(sc->gatt); 152 return 0; 153 } 154 155 #define M 1024*1024 156 157 static u_int32_t agp_ali_table[] = { 158 0, /* 0 - invalid */ 159 1, /* 1 - invalid */ 160 2, /* 2 - invalid */ 161 4*M, /* 3 - invalid */ 162 8*M, /* 4 - invalid */ 163 0, /* 5 - invalid */ 164 16*M, /* 6 - invalid */ 165 32*M, /* 7 - invalid */ 166 64*M, /* 8 - invalid */ 167 128*M, /* 9 - invalid */ 168 256*M, /* 10 - invalid */ 169 }; 170 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0])) 171 172 static u_int32_t 173 agp_ali_get_aperture(device_t dev) 174 { 175 /* 176 * The aperture size is derived from the low bits of attbase. 177 * I'm not sure this is correct.. 178 */ 179 int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff; 180 if (i >= agp_ali_table_size) 181 return 0; 182 return agp_ali_table[i]; 183 } 184 185 static int 186 agp_ali_set_aperture(device_t dev, u_int32_t aperture) 187 { 188 int i; 189 190 for (i = 0; i < agp_ali_table_size; i++) 191 if (agp_ali_table[i] == aperture) 192 break; 193 if (i == agp_ali_table_size) 194 return EINVAL; 195 196 pci_write_config(dev, AGP_ALI_ATTBASE, 197 ((pci_read_config(dev, AGP_ALI_ATTBASE, 4) & ~0xff) 198 | i), 4); 199 return 0; 200 } 201 202 static int 203 agp_ali_bind_page(device_t dev, int offset, vm_offset_t physical) 204 { 205 struct agp_ali_softc *sc = device_get_softc(dev); 206 207 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 208 return EINVAL; 209 210 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 211 return 0; 212 } 213 214 static int 215 agp_ali_unbind_page(device_t dev, int offset) 216 { 217 struct agp_ali_softc *sc = device_get_softc(dev); 218 219 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 220 return EINVAL; 221 222 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 223 return 0; 224 } 225 226 static void 227 agp_ali_flush_tlb(device_t dev) 228 { 229 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1); 230 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1); 231 } 232 233 static device_method_t agp_ali_methods[] = { 234 /* Device interface */ 235 DEVMETHOD(device_probe, agp_ali_probe), 236 DEVMETHOD(device_attach, agp_ali_attach), 237 DEVMETHOD(device_detach, agp_ali_detach), 238 DEVMETHOD(device_shutdown, bus_generic_shutdown), 239 DEVMETHOD(device_suspend, bus_generic_suspend), 240 DEVMETHOD(device_resume, bus_generic_resume), 241 242 /* AGP interface */ 243 DEVMETHOD(agp_get_aperture, agp_ali_get_aperture), 244 DEVMETHOD(agp_set_aperture, agp_ali_set_aperture), 245 DEVMETHOD(agp_bind_page, agp_ali_bind_page), 246 DEVMETHOD(agp_unbind_page, agp_ali_unbind_page), 247 DEVMETHOD(agp_flush_tlb, agp_ali_flush_tlb), 248 DEVMETHOD(agp_enable, agp_generic_enable), 249 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 250 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 251 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 252 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 253 254 { 0, 0 } 255 }; 256 257 static driver_t agp_ali_driver = { 258 "agp", 259 agp_ali_methods, 260 sizeof(struct agp_ali_softc), 261 }; 262 263 static devclass_t agp_devclass; 264 265 DRIVER_MODULE(agp_ali, pci, agp_ali_driver, agp_devclass, 0, 0); 266