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/dev/agp/agp_sis.c,v 1.22 2007/11/12 21:51:37 jhb Exp $
  27  */
  28
  29 #include <sys/param.h>
  30 #include <sys/systm.h>
  31 #include <sys/malloc.h>
  32 #include <sys/kernel.h>
  33 #include <sys/bus.h>
  34 #include <sys/lock.h>
  35
  36 #include <bus/pci/pcivar.h>
  37 #include <bus/pci/pcireg.h>
  38 #include "agppriv.h"
  39 #include "agpreg.h"
  40
  41 #include <vm/vm.h>
  42 #include <vm/vm_object.h>
  43 #include <vm/pmap.h>
  44
  45 struct agp_sis_softc {
  46         struct agp_softc agp;
  47         u_int32_t       initial_aperture; /* aperture size at startup */
  48         struct agp_gatt *gatt;
  49 };
  50
  51 static const char*
  52 agp_sis_match(device_t dev)
  53 {
  54         if (pci_get_class(dev) != PCIC_BRIDGE
  55             || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
  56                 return NULL;
  57
  58         if (agp_find_caps(dev) == 0)
  59                 return NULL;
  60
  61         switch (pci_get_devid(dev)) {
  62         case 0x00011039:
  63                 return ("SiS 5591 host to AGP bridge");
  64         case 0x05301039:
  65                 return ("SiS 530 host to AGP bridge");
  66         case 0x05401039:
  67                 return ("SiS 540 host to AGP bridge");
  68         case 0x05501039:
  69                 return ("SiS 550 host to AGP bridge");
  70         case 0x06201039:
  71                 return ("SiS 620 host to AGP bridge");
  72         case 0x06301039:
  73                 return ("SiS 630 host to AGP bridge");
  74         case 0x06451039:
  75                 return ("SiS 645 host to AGP bridge");
  76         case 0x06461039:
  77                 return ("SiS 645DX host to AGP bridge");
  78         case 0x06481039:
  79                 return ("SiS 648 host to AGP bridge");
  80         case 0x06501039:
  81                 return ("SiS 650 host to AGP bridge");
  82         case 0x06511039:
  83                 return ("SiS 651 host to AGP bridge");
  84         case 0x06551039:
  85                 return ("SiS 655 host to AGP bridge");
  86         case 0x06611039:
  87                 return ("SiS 661 host to AGP bridge");
  88         case 0x07301039:
  89                 return ("SiS 730 host to AGP bridge");
  90         case 0x07351039:
  91                 return ("SiS 735 host to AGP bridge");
  92         case 0x07401039:
  93                 return ("SiS 740 host to AGP bridge");
  94         case 0x07411039:
  95                 return ("SiS 741 host to AGP bridge");
  96         case 0x07451039:
  97                 return ("SiS 745 host to AGP bridge");
  98         case 0x07461039:
  99                 return ("SiS 746 host to AGP bridge");
 100         }
 101
 102         return NULL;
 103 }
 104
 105 static int
 106 agp_sis_probe(device_t dev)
 107 {
 108         const char *desc;
 109
 110         if (resource_disabled("agp", device_get_unit(dev)))
 111                 return (ENXIO);
 112         desc = agp_sis_match(dev);
 113         if (desc) {
 114                 device_verbose(dev);
 115                 device_set_desc(dev, desc);
 116                 return BUS_PROBE_DEFAULT;
 117         }
 118
 119         return ENXIO;
 120 }
 121
 122 static int
 123 agp_sis_attach(device_t dev)
 124 {
 125         struct agp_sis_softc *sc = device_get_softc(dev);
 126         struct agp_gatt *gatt;
 127         int error;
 128
 129         error = agp_generic_attach(dev);
 130         if (error)
 131                 return error;
 132
 133         sc->initial_aperture = AGP_GET_APERTURE(dev);
 134
 135         for (;;) {
 136                 gatt = agp_alloc_gatt(dev);
 137                 if (gatt)
 138                         break;
 139
 140                 /*
 141                  * Probably contigmalloc failure. Try reducing the
 142                  * aperture so that the gatt size reduces.
 143                  */
 144                 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
 145                         agp_generic_detach(dev);
 146                         return ENOMEM;
 147                 }
 148         }
 149         sc->gatt = gatt;
 150
 151         /* Install the gatt. */
 152         pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4);
 153
 154         /* Enable the aperture. */
 155         pci_write_config(dev, AGP_SIS_WINCTRL,
 156                          pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1);
 157
 158         /*
 159          * Enable the TLB and make it automatically invalidate entries
 160          * when the GATT is written.
 161          */
 162         pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1);
 163
 164         return 0;
 165 }
 166
 167 static int
 168 agp_sis_detach(device_t dev)
 169 {
 170         struct agp_sis_softc *sc = device_get_softc(dev);
 171
 172         agp_free_cdev(dev);
 173
 174         /* Disable the aperture.. */
 175         pci_write_config(dev, AGP_SIS_WINCTRL,
 176                          pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1);
 177
 178         /* and the TLB. */
 179         pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1);
 180
 181         /* Put the aperture back the way it started. */
 182         AGP_SET_APERTURE(dev, sc->initial_aperture);
 183
 184         agp_free_gatt(sc->gatt);
 185         agp_free_res(dev);
 186         return 0;
 187 }
 188
 189 static u_int32_t
 190 agp_sis_get_aperture(device_t dev)
 191 {
 192         int gws;
 193
 194         /*
 195          * The aperture size is equal to 4M<<gws.
 196          */
 197         gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4;
 198         return (4*1024*1024) << gws;
 199 }
 200
 201 static int
 202 agp_sis_set_aperture(device_t dev, u_int32_t aperture)
 203 {
 204         int gws;
 205
 206         /*
 207          * Check for a power of two and make sure its within the
 208          * programmable range.
 209          */
 210         if (aperture & (aperture - 1)
 211             || aperture < 4*1024*1024
 212             || aperture > 256*1024*1024)
 213                 return EINVAL;
 214
 215         gws = ffs(aperture / 4*1024*1024) - 1;
 216
 217         pci_write_config(dev, AGP_SIS_WINCTRL,
 218                          ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70)
 219                           | gws << 4), 1);
 220
 221         return 0;
 222 }
 223
 224 static int
 225 agp_sis_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
 226 {
 227         struct agp_sis_softc *sc = device_get_softc(dev);
 228
 229         if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
 230                 return EINVAL;
 231
 232         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
 233         return 0;
 234 }
 235
 236 static int
 237 agp_sis_unbind_page(device_t dev, vm_offset_t offset)
 238 {
 239         struct agp_sis_softc *sc = device_get_softc(dev);
 240
 241         if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
 242                 return EINVAL;
 243
 244         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
 245         return 0;
 246 }
 247
 248 static void
 249 agp_sis_flush_tlb(device_t dev)
 250 {
 251         pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1);
 252 }
 253
 254 static device_method_t agp_sis_methods[] = {
 255         /* Device interface */
 256         DEVMETHOD(device_probe,         agp_sis_probe),
 257         DEVMETHOD(device_attach,        agp_sis_attach),
 258         DEVMETHOD(device_detach,        agp_sis_detach),
 259         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
 260         DEVMETHOD(device_suspend,       bus_generic_suspend),
 261         DEVMETHOD(device_resume,        bus_generic_resume),
 262
 263         /* AGP interface */
 264         DEVMETHOD(agp_get_aperture,     agp_sis_get_aperture),
 265         DEVMETHOD(agp_set_aperture,     agp_sis_set_aperture),
 266         DEVMETHOD(agp_bind_page,        agp_sis_bind_page),
 267         DEVMETHOD(agp_unbind_page,      agp_sis_unbind_page),
 268         DEVMETHOD(agp_flush_tlb,        agp_sis_flush_tlb),
 269         DEVMETHOD(agp_enable,           agp_generic_enable),
 270         DEVMETHOD(agp_alloc_memory,     agp_generic_alloc_memory),
 271         DEVMETHOD(agp_free_memory,      agp_generic_free_memory),
 272         DEVMETHOD(agp_bind_memory,      agp_generic_bind_memory),
 273         DEVMETHOD(agp_unbind_memory,    agp_generic_unbind_memory),
 274
 275         DEVMETHOD_END
 276 };
 277
 278 static driver_t agp_sis_driver = {
 279         "agp",
 280         agp_sis_methods,
 281         sizeof(struct agp_sis_softc),
 282 };
 283
 284 static devclass_t agp_devclass;
 285
 286 DRIVER_MODULE(agp_sis, pci, agp_sis_driver, agp_devclass, NULL, NULL);
 287 MODULE_DEPEND(agp_sis, agp, 1, 1, 1);
 288 MODULE_DEPEND(agp_sis, pci, 1, 1, 1);