agp_ali.c revision 142646
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: head/sys/dev/agp/agp_ali.c 142646 2005-02-27 13:05:34Z cognet $"); 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 51struct 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 57static const char* 58agp_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 0x167110b9: 69 return ("Ali M1671 host to AGP bridge"); 70 case 0x154110b9: 71 return ("Ali M1541 host to AGP bridge"); 72 case 0x162110b9: 73 return ("Ali M1621 host to AGP bridge"); 74 }; 75 76 return NULL; 77} 78 79static int 80agp_ali_probe(device_t dev) 81{ 82 const char *desc; 83 84 if (resource_disabled("agp", device_get_unit(dev))) 85 return (ENXIO); 86 desc = agp_ali_match(dev); 87 if (desc) { 88 device_verbose(dev); 89 device_set_desc(dev, desc); 90 return BUS_PROBE_DEFAULT; 91 } 92 93 return ENXIO; 94} 95 96static int 97agp_ali_attach(device_t dev) 98{ 99 struct agp_ali_softc *sc = device_get_softc(dev); 100 struct agp_gatt *gatt; 101 int error; 102 u_int32_t attbase; 103 104 error = agp_generic_attach(dev); 105 if (error) 106 return error; 107 108 sc->initial_aperture = AGP_GET_APERTURE(dev); 109 if (sc->initial_aperture == 0) { 110 device_printf(dev, "bad initial aperture size, disabling\n"); 111 return ENXIO; 112 } 113 114 for (;;) { 115 gatt = agp_alloc_gatt(dev); 116 if (gatt) 117 break; 118 119 /* 120 * Probably contigmalloc failure. Try reducing the 121 * aperture so that the gatt size reduces. 122 */ 123 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 124 agp_generic_detach(dev); 125 return ENOMEM; 126 } 127 } 128 sc->gatt = gatt; 129 130 /* Install the gatt. */ 131 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4); 132 pci_write_config(dev, AGP_ALI_ATTBASE, gatt->ag_physical | 133 (attbase & 0xfff), 4); 134 135 /* Enable the TLB. */ 136 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1); 137 138 return 0; 139} 140 141static int 142agp_ali_detach(device_t dev) 143{ 144 struct agp_ali_softc *sc = device_get_softc(dev); 145 int error; 146 u_int32_t attbase; 147 148 error = agp_generic_detach(dev); 149 if (error) 150 return error; 151 152 /* Disable the TLB.. */ 153 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1); 154 155 /* Put the aperture back the way it started. */ 156 AGP_SET_APERTURE(dev, sc->initial_aperture); 157 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4); 158 pci_write_config(dev, AGP_ALI_ATTBASE, attbase & 0xfff, 4); 159 160 agp_free_gatt(sc->gatt); 161 return 0; 162} 163 164#define M 1024*1024 165 166static u_int32_t agp_ali_table[] = { 167 0, /* 0 - invalid */ 168 1, /* 1 - invalid */ 169 2, /* 2 - invalid */ 170 4*M, /* 3 - invalid */ 171 8*M, /* 4 - invalid */ 172 0, /* 5 - invalid */ 173 16*M, /* 6 - invalid */ 174 32*M, /* 7 - invalid */ 175 64*M, /* 8 - invalid */ 176 128*M, /* 9 - invalid */ 177 256*M, /* 10 - invalid */ 178}; 179#define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0])) 180 181static u_int32_t 182agp_ali_get_aperture(device_t dev) 183{ 184 /* 185 * The aperture size is derived from the low bits of attbase. 186 * I'm not sure this is correct.. 187 */ 188 int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xf; 189 if (i >= agp_ali_table_size) 190 return 0; 191 return agp_ali_table[i]; 192} 193 194static int 195agp_ali_set_aperture(device_t dev, u_int32_t aperture) 196{ 197 int i; 198 u_int32_t attbase; 199 200 for (i = 0; i < agp_ali_table_size; i++) 201 if (agp_ali_table[i] == aperture) 202 break; 203 if (i == agp_ali_table_size) 204 return EINVAL; 205 206 attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4); 207 pci_write_config(dev, AGP_ALI_ATTBASE, (attbase & ~0xf) | i, 4); 208 return 0; 209} 210 211static int 212agp_ali_bind_page(device_t dev, int offset, vm_offset_t physical) 213{ 214 struct agp_ali_softc *sc = device_get_softc(dev); 215 216 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 217 return EINVAL; 218 219 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 220 return 0; 221} 222 223static int 224agp_ali_unbind_page(device_t dev, int offset) 225{ 226 struct agp_ali_softc *sc = device_get_softc(dev); 227 228 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 229 return EINVAL; 230 231 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 232 return 0; 233} 234 235static void 236agp_ali_flush_tlb(device_t dev) 237{ 238 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1); 239 pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1); 240} 241 242static device_method_t agp_ali_methods[] = { 243 /* Device interface */ 244 DEVMETHOD(device_probe, agp_ali_probe), 245 DEVMETHOD(device_attach, agp_ali_attach), 246 DEVMETHOD(device_detach, agp_ali_detach), 247 DEVMETHOD(device_shutdown, bus_generic_shutdown), 248 DEVMETHOD(device_suspend, bus_generic_suspend), 249 DEVMETHOD(device_resume, bus_generic_resume), 250 251 /* AGP interface */ 252 DEVMETHOD(agp_get_aperture, agp_ali_get_aperture), 253 DEVMETHOD(agp_set_aperture, agp_ali_set_aperture), 254 DEVMETHOD(agp_bind_page, agp_ali_bind_page), 255 DEVMETHOD(agp_unbind_page, agp_ali_unbind_page), 256 DEVMETHOD(agp_flush_tlb, agp_ali_flush_tlb), 257 DEVMETHOD(agp_enable, agp_generic_enable), 258 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 259 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 260 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 261 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 262 263 { 0, 0 } 264}; 265 266static driver_t agp_ali_driver = { 267 "agp", 268 agp_ali_methods, 269 sizeof(struct agp_ali_softc), 270}; 271 272static devclass_t agp_devclass; 273 274DRIVER_MODULE(agp_ali, pci, agp_ali_driver, agp_devclass, 0, 0); 275MODULE_DEPEND(agp_ali, agp, 1, 1, 1); 276MODULE_DEPEND(agp_ali, pci, 1, 1, 1); 277