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/lockmgr.h> 39 #include <sys/mutex.h> 40 #include <sys/proc.h> 41 42 #include <pci/pcivar.h> 43 #include <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 }; 71 72 if (pci_get_vendor(dev) == 0x10b9) 73 return ("Ali Generic host to PCI bridge"); 74 75 return NULL; 76 } 77 78 static int 79 agp_ali_probe(device_t dev) 80 { 81 const char *desc; 82 83 desc = agp_ali_match(dev); 84 if (desc) { 85 device_verbose(dev); 86 device_set_desc(dev, desc); 87 return 0; 88 } 89 90 return ENXIO; 91 } 92 93 static int 94 agp_ali_attach(device_t dev) 95 { 96 struct agp_ali_softc *sc = device_get_softc(dev); 97 struct agp_gatt *gatt; 98 int error; 99 100 error = agp_generic_attach(dev); 101 if (error) 102 return error; 103 104 sc->initial_aperture = AGP_GET_APERTURE(dev); 105 106 for (;;) { 107 gatt = agp_alloc_gatt(dev); 108 if (gatt) 109 break; 110 111 /* 112 * Probably contigmalloc failure. Try reducing the 113 * aperture so that the gatt size reduces. 114 */ 115 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 116 agp_generic_detach(dev); 117 return ENOMEM; 118 } 119 } 120 sc->gatt = gatt; 121 122 /* Install the gatt. */ 123 pci_write_config(dev, AGP_ALI_ATTBASE, 124 (gatt->ag_physical 125 | (pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff)), 126 4); 127 128 /* Enable the TLB. */ 129 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1); 130 131 return 0; 132 } 133 134 static int 135 agp_ali_detach(device_t dev) 136 { 137 struct agp_ali_softc *sc = device_get_softc(dev); 138 int error; 139 140 error = agp_generic_detach(dev); 141 if (error) 142 return error; 143 144 /* Disable the TLB.. */ 145 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1); 146 147 /* Put the aperture back the way it started. */ 148 AGP_SET_APERTURE(dev, sc->initial_aperture); 149 pci_write_config(dev, AGP_ALI_ATTBASE, 150 pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff, 151 4); 152 153 agp_free_gatt(sc->gatt); 154 return 0; 155 } 156 157 #define M 1024*1024 158 159 static u_int32_t agp_ali_table[] = { 160 0, /* 0 - invalid */ 161 1, /* 1 - invalid */ 162 2, /* 2 - invalid */ 163 4*M, /* 3 - invalid */ 164 8*M, /* 4 - invalid */ 165 0, /* 5 - invalid */ 166 16*M, /* 6 - invalid */ 167 32*M, /* 7 - invalid */ 168 64*M, /* 8 - invalid */ 169 128*M, /* 9 - invalid */ 170 256*M, /* 10 - invalid */ 171 }; 172 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0])) 173 174 static u_int32_t 175 agp_ali_get_aperture(device_t dev) 176 { 177 /* 178 * The aperture size is derived from the low bits of attbase. 179 * I'm not sure this is correct.. 180 */ 181 int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff; 182 if (i >= agp_ali_table_size) 183 return 0; 184 return agp_ali_table[i]; 185 } 186 187 static int 188 agp_ali_set_aperture(device_t dev, u_int32_t aperture) 189 { 190 int i; 191 192 for (i = 0; i < agp_ali_table_size; i++) 193 if (agp_ali_table[i] == aperture) 194 break; 195 if (i == agp_ali_table_size) 196 return EINVAL; 197 198 pci_write_config(dev, AGP_ALI_ATTBASE, 199 ((pci_read_config(dev, AGP_ALI_ATTBASE, 4) & ~0xff) 200 | i), 4); 201 return 0; 202 } 203 204 static int 205 agp_ali_bind_page(device_t dev, int offset, vm_offset_t physical) 206 { 207 struct agp_ali_softc *sc = device_get_softc(dev); 208 209 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 210 return EINVAL; 211 212 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 213 return 0; 214 } 215 216 static int 217 agp_ali_unbind_page(device_t dev, int offset) 218 { 219 struct agp_ali_softc *sc = device_get_softc(dev); 220 221 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 222 return EINVAL; 223 224 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 225 return 0; 226 } 227 228 static void 229 agp_ali_flush_tlb(device_t dev) 230 { 231 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1); 232 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1); 233 } 234 235 static device_method_t agp_ali_methods[] = { 236 /* Device interface */ 237 DEVMETHOD(device_probe, agp_ali_probe), 238 DEVMETHOD(device_attach, agp_ali_attach), 239 DEVMETHOD(device_detach, agp_ali_detach), 240 DEVMETHOD(device_shutdown, bus_generic_shutdown), 241 DEVMETHOD(device_suspend, bus_generic_suspend), 242 DEVMETHOD(device_resume, bus_generic_resume), 243 244 /* AGP interface */ 245 DEVMETHOD(agp_get_aperture, agp_ali_get_aperture), 246 DEVMETHOD(agp_set_aperture, agp_ali_set_aperture), 247 DEVMETHOD(agp_bind_page, agp_ali_bind_page), 248 DEVMETHOD(agp_unbind_page, agp_ali_unbind_page), 249 DEVMETHOD(agp_flush_tlb, agp_ali_flush_tlb), 250 DEVMETHOD(agp_enable, agp_generic_enable), 251 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 252 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 253 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 254 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 255 256 { 0, 0 } 257 }; 258 259 static driver_t agp_ali_driver = { 260 "agp", 261 agp_ali_methods, 262 sizeof(struct agp_ali_softc), 263 }; 264 265 static devclass_t agp_devclass; 266 267 DRIVER_MODULE(agp_ali, pci, agp_ali_driver, agp_devclass, 0, 0); 268