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 #include <sys/proc.h> 40 41 #include <pci/pcivar.h> 42 #include <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 desc = agp_ali_match(dev); 83 if (desc) { 84 device_verbose(dev); 85 device_set_desc(dev, desc); 86 return 0; 87 } 88 89 return ENXIO; 90 } 91 92 static int 93 agp_ali_attach(device_t dev) 94 { 95 struct agp_ali_softc *sc = device_get_softc(dev); 96 struct agp_gatt *gatt; 97 int error; 98 99 error = agp_generic_attach(dev); 100 if (error) 101 return error; 102 103 sc->initial_aperture = AGP_GET_APERTURE(dev); 104 105 for (;;) { 106 gatt = agp_alloc_gatt(dev); 107 if (gatt) 108 break; 109 110 /* 111 * Probably contigmalloc failure. Try reducing the 112 * aperture so that the gatt size reduces. 113 */ 114 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 115 agp_generic_detach(dev); 116 return ENOMEM; 117 } 118 } 119 sc->gatt = gatt; 120 121 /* Install the gatt. */ 122 pci_write_config(dev, AGP_ALI_ATTBASE, 123 (gatt->ag_physical 124 | (pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff)), 125 4); 126 127 /* Enable the TLB. */ 128 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1); 129 130 return 0; 131 } 132 133 static int 134 agp_ali_detach(device_t dev) 135 { 136 struct agp_ali_softc *sc = device_get_softc(dev); 137 int error; 138 139 error = agp_generic_detach(dev); 140 if (error) 141 return error; 142 143 /* Disable the TLB.. */ 144 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1); 145 146 /* Put the aperture back the way it started. */ 147 AGP_SET_APERTURE(dev, sc->initial_aperture); 148 pci_write_config(dev, AGP_ALI_ATTBASE, 149 pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff, 150 4); 151 152 agp_free_gatt(sc->gatt); 153 return 0; 154 } 155 156 #define M 1024*1024 157 158 static u_int32_t agp_ali_table[] = { 159 0, /* 0 - invalid */ 160 1, /* 1 - invalid */ 161 2, /* 2 - invalid */ 162 4*M, /* 3 - invalid */ 163 8*M, /* 4 - invalid */ 164 0, /* 5 - invalid */ 165 16*M, /* 6 - invalid */ 166 32*M, /* 7 - invalid */ 167 64*M, /* 8 - invalid */ 168 128*M, /* 9 - invalid */ 169 256*M, /* 10 - invalid */ 170 }; 171 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0])) 172 173 static u_int32_t 174 agp_ali_get_aperture(device_t dev) 175 { 176 /* 177 * The aperture size is derived from the low bits of attbase. 178 * I'm not sure this is correct.. 179 */ 180 int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff; 181 if (i >= agp_ali_table_size) 182 return 0; 183 return agp_ali_table[i]; 184 } 185 186 static int 187 agp_ali_set_aperture(device_t dev, u_int32_t aperture) 188 { 189 int i; 190 191 for (i = 0; i < agp_ali_table_size; i++) 192 if (agp_ali_table[i] == aperture) 193 break; 194 if (i == agp_ali_table_size) 195 return EINVAL; 196 197 pci_write_config(dev, AGP_ALI_ATTBASE, 198 ((pci_read_config(dev, AGP_ALI_ATTBASE, 4) & ~0xff) 199 | i), 4); 200 return 0; 201 } 202 203 static int 204 agp_ali_bind_page(device_t dev, int offset, vm_offset_t physical) 205 { 206 struct agp_ali_softc *sc = device_get_softc(dev); 207 208 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 209 return EINVAL; 210 211 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 212 return 0; 213 } 214 215 static int 216 agp_ali_unbind_page(device_t dev, int offset) 217 { 218 struct agp_ali_softc *sc = device_get_softc(dev); 219 220 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 221 return EINVAL; 222 223 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 224 return 0; 225 } 226 227 static void 228 agp_ali_flush_tlb(device_t dev) 229 { 230 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1); 231 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1); 232 } 233 234 static device_method_t agp_ali_methods[] = { 235 /* Device interface */ 236 DEVMETHOD(device_probe, agp_ali_probe), 237 DEVMETHOD(device_attach, agp_ali_attach), 238 DEVMETHOD(device_detach, agp_ali_detach), 239 DEVMETHOD(device_shutdown, bus_generic_shutdown), 240 DEVMETHOD(device_suspend, bus_generic_suspend), 241 DEVMETHOD(device_resume, bus_generic_resume), 242 243 /* AGP interface */ 244 DEVMETHOD(agp_get_aperture, agp_ali_get_aperture), 245 DEVMETHOD(agp_set_aperture, agp_ali_set_aperture), 246 DEVMETHOD(agp_bind_page, agp_ali_bind_page), 247 DEVMETHOD(agp_unbind_page, agp_ali_unbind_page), 248 DEVMETHOD(agp_flush_tlb, agp_ali_flush_tlb), 249 DEVMETHOD(agp_enable, agp_generic_enable), 250 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 251 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 252 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 253 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 254 255 { 0, 0 } 256 }; 257 258 static driver_t agp_ali_driver = { 259 "agp", 260 agp_ali_methods, 261 sizeof(struct agp_ali_softc), 262 }; 263 264 static devclass_t agp_devclass; 265 266 DRIVER_MODULE(agp_ali, pci, agp_ali_driver, agp_devclass, 0, 0); 267