sys/dev/agp/agp_sis.c

   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: src/sys/pci/agp_sis.c,v 1.1.2.1 2000/07/19 09:48:04 ru Exp $
  27  *      $DragonFly: src/sys/dev/agp/agp_sis.c,v 1.5 2004/07/04 02:24:52 dillon Exp $
  28  */
  29
  30 #include "opt_bus.h"
  31 #include "opt_pci.h"
  32
  33 #include <sys/param.h>
  34 #include <sys/systm.h>
  35 #include <sys/malloc.h>
  36 #include <sys/kernel.h>
  37 #include <sys/bus.h>
  38 #include <sys/lock.h>
  39
  40 #include <bus/pci/pcivar.h>
  41 #include <bus/pci/pcireg.h>
  42 #include "agppriv.h"
  43 #include "agpreg.h"
  44
  45 #include <vm/vm.h>
  46 #include <vm/vm_object.h>
  47 #include <vm/pmap.h>
  48
  49 struct agp_sis_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_sis_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 0x00011039:
  67                 return ("SiS 5591 host to AGP bridge");
  68         case 0x05301039:
  69                 return ("SiS 530 host to AGP bridge");
  70         case 0x05401039:
  71                 return ("SiS 540 host to AGP bridge");
  72         case 0x05501039:
  73                 return ("SiS 550 host to AGP bridge");
  74         case 0x06201039:
  75                 return ("SiS 620 host to AGP bridge");
  76         case 0x06301039:
  77                 return ("SiS 630 host to AGP bridge");
  78         case 0x06451039:
  79                 return ("SiS 645 host to AGP bridge");
  80         case 0x06461039:
  81                 return ("SiS 645DX host to AGP bridge");
  82         case 0x06481039:
  83                 return ("SiS 648 host to AGP bridge");
  84         case 0x06501039:
  85                 return ("SiS 650 host to AGP bridge");
  86         case 0x06511039:
  87                 return ("SiS 651 host to AGP bridge");
  88         case 0x06551039:
  89                 return ("SiS 655 host to AGP bridge");
  90         case 0x06611039:
  91                 return ("SiS 661 host to AGP bridge");
  92         case 0x07301039:
  93                 return ("SiS 730 host to AGP bridge");
  94         case 0x07351039:
  95                 return ("SiS 735 host to AGP bridge");
  96         case 0x07401039:
  97                 return ("SiS 740 host to AGP bridge");
  98         case 0x07411039:
  99                 return ("SiS 741 host to AGP bridge");
 100         case 0x07451039:
 101                 return ("SiS 745 host to AGP bridge");
 102         case 0x07461039:
 103                 return ("SiS 746 host to AGP bridge");
 104         case 0x07601039:
 105                 return ("SiS 760 host to AGP bridge");
 106         };
 107
 108         if (pci_get_vendor(dev) == 0x1039)
 109                 return ("SIS Generic host to PCI bridge");
 110
 111         return NULL;
 112 }
 113
 114 static int
 115 agp_sis_probe(device_t dev)
 116 {
 117         const char *desc;
 118
 119         desc = agp_sis_match(dev);
 120         if (desc) {
 121                 device_verbose(dev);
 122                 device_set_desc(dev, desc);
 123                 return 0;
 124         }
 125
 126         return ENXIO;
 127 }
 128
 129 static int
 130 agp_sis_attach(device_t dev)
 131 {
 132         struct agp_sis_softc *sc = device_get_softc(dev);
 133         struct agp_gatt *gatt;
 134         int error;
 135
 136         error = agp_generic_attach(dev);
 137         if (error)
 138                 return error;
 139
 140         sc->initial_aperture = AGP_GET_APERTURE(dev);
 141
 142         for (;;) {
 143                 gatt = agp_alloc_gatt(dev);
 144                 if (gatt)
 145                         break;
 146
 147                 /*
 148                  * Probably contigmalloc failure. Try reducing the
 149                  * aperture so that the gatt size reduces.
 150                  */
 151                 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
 152                         agp_generic_detach(dev);
 153                         return ENOMEM;
 154                 }
 155         }
 156         sc->gatt = gatt;
 157
 158         /* Install the gatt. */
 159         pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4);
 160
 161         /* Enable the aperture. */
 162         pci_write_config(dev, AGP_SIS_WINCTRL,
 163                          pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1);
 164
 165         /*
 166          * Enable the TLB and make it automatically invalidate entries
 167          * when the GATT is written.
 168          */
 169         pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1);
 170
 171         return 0;
 172 }
 173
 174 static int
 175 agp_sis_detach(device_t dev)
 176 {
 177         struct agp_sis_softc *sc = device_get_softc(dev);
 178         int error;
 179
 180         error = agp_generic_detach(dev);
 181         if (error)
 182                 return error;
 183
 184         /* Disable the aperture.. */
 185         pci_write_config(dev, AGP_SIS_WINCTRL,
 186                          pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1);
 187
 188         /* and the TLB. */
 189         pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1);
 190
 191         /* Put the aperture back the way it started. */
 192         AGP_SET_APERTURE(dev, sc->initial_aperture);
 193
 194         agp_free_gatt(sc->gatt);
 195         return 0;
 196 }
 197
 198 static u_int32_t
 199 agp_sis_get_aperture(device_t dev)
 200 {
 201         int gws;
 202
 203         /*
 204          * The aperture size is equal to 4M<<gws.
 205          */
 206         gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4;
 207         return (4*1024*1024) << gws;
 208 }
 209
 210 static int
 211 agp_sis_set_aperture(device_t dev, u_int32_t aperture)
 212 {
 213         int gws;
 214
 215         /*
 216          * Check for a power of two and make sure its within the
 217          * programmable range.
 218          */
 219         if (aperture & (aperture - 1)
 220             || aperture < 4*1024*1024
 221             || aperture > 256*1024*1024)
 222                 return EINVAL;
 223
 224         gws = ffs(aperture / 4*1024*1024) - 1;
 225
 226         pci_write_config(dev, AGP_SIS_WINCTRL,
 227                          ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70)
 228                           | gws << 4), 1);
 229
 230         return 0;
 231 }
 232
 233 static int
 234 agp_sis_bind_page(device_t dev, int offset, vm_offset_t physical)
 235 {
 236         struct agp_sis_softc *sc = device_get_softc(dev);
 237
 238         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
 239                 return EINVAL;
 240
 241         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
 242         return 0;
 243 }
 244
 245 static int
 246 agp_sis_unbind_page(device_t dev, int offset)
 247 {
 248         struct agp_sis_softc *sc = device_get_softc(dev);
 249
 250         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
 251                 return EINVAL;
 252
 253         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
 254         return 0;
 255 }
 256
 257 static void
 258 agp_sis_flush_tlb(device_t dev)
 259 {
 260         pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1);
 261 }
 262
 263 static device_method_t agp_sis_methods[] = {
 264         /* Device interface */
 265         DEVMETHOD(device_probe,         agp_sis_probe),
 266         DEVMETHOD(device_attach,        agp_sis_attach),
 267         DEVMETHOD(device_detach,        agp_sis_detach),
 268         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
 269         DEVMETHOD(device_suspend,       bus_generic_suspend),
 270         DEVMETHOD(device_resume,        bus_generic_resume),
 271
 272         /* AGP interface */
 273         DEVMETHOD(agp_get_aperture,     agp_sis_get_aperture),
 274         DEVMETHOD(agp_set_aperture,     agp_sis_set_aperture),
 275         DEVMETHOD(agp_bind_page,        agp_sis_bind_page),
 276         DEVMETHOD(agp_unbind_page,      agp_sis_unbind_page),
 277         DEVMETHOD(agp_flush_tlb,        agp_sis_flush_tlb),
 278         DEVMETHOD(agp_enable,           agp_generic_enable),
 279         DEVMETHOD(agp_alloc_memory,     agp_generic_alloc_memory),
 280         DEVMETHOD(agp_free_memory,      agp_generic_free_memory),
 281         DEVMETHOD(agp_bind_memory,      agp_generic_bind_memory),
 282         DEVMETHOD(agp_unbind_memory,    agp_generic_unbind_memory),
 283
 284         { 0, 0 }
 285 };
 286
 287 static driver_t agp_sis_driver = {
 288         "agp",
 289         agp_sis_methods,
 290         sizeof(struct agp_sis_softc),
 291 };
 292
 293 static devclass_t agp_devclass;
 294
 295 DRIVER_MODULE(agp_sis, pci, agp_sis_driver, agp_devclass, 0, 0);
 296 MODULE_DEPEND(agp_sis, agp, 1, 1, 1);
 297 MODULE_DEPEND(agp_sis, pci, 1, 1, 1);