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  *      $DragonFly: src/sys/dev/agp/agp_sis.c,v 1.8 2008/01/07 01:34:58 corecode Exp $
  28  */
  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/bus.h>
  37 #include <sys/lock.h>
  38
  39 #include <bus/pci/pcivar.h>
  40 #include <bus/pci/pcireg.h>
  41 #include "agppriv.h"
  42 #include "agpreg.h"
  43
  44 #include <vm/vm.h>
  45 #include <vm/vm_object.h>
  46 #include <vm/pmap.h>
  47
  48 struct agp_sis_softc {
  49         struct agp_softc agp;
  50         u_int32_t       initial_aperture; /* aperture size at startup */
  51         struct agp_gatt *gatt;
  52 };
  53
  54 static const char*
  55 agp_sis_match(device_t dev)
  56 {
  57         if (pci_get_class(dev) != PCIC_BRIDGE
  58             || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
  59                 return NULL;
  60
  61         if (agp_find_caps(dev) == 0)
  62                 return NULL;
  63
  64         switch (pci_get_devid(dev)) {
  65         case 0x00011039:
  66                 return ("SiS 5591 host to AGP bridge");
  67         case 0x05301039:
  68                 return ("SiS 530 host to AGP bridge");
  69         case 0x05401039:
  70                 return ("SiS 540 host to AGP bridge");
  71         case 0x05501039:
  72                 return ("SiS 550 host to AGP bridge");
  73         case 0x06201039:
  74                 return ("SiS 620 host to AGP bridge");
  75         case 0x06301039:
  76                 return ("SiS 630 host to AGP bridge");
  77         case 0x06451039:
  78                 return ("SiS 645 host to AGP bridge");
  79         case 0x06461039:
  80                 return ("SiS 645DX host to AGP bridge");
  81         case 0x06481039:
  82                 return ("SiS 648 host to AGP bridge");
  83         case 0x06501039:
  84                 return ("SiS 650 host to AGP bridge");
  85         case 0x06511039:
  86                 return ("SiS 651 host to AGP bridge");
  87         case 0x06551039:
  88                 return ("SiS 655 host to AGP bridge");
  89         case 0x06611039:
  90                 return ("SiS 661 host to AGP bridge");
  91         case 0x07301039:
  92                 return ("SiS 730 host to AGP bridge");
  93         case 0x07351039:
  94                 return ("SiS 735 host to AGP bridge");
  95         case 0x07401039:
  96                 return ("SiS 740 host to AGP bridge");
  97         case 0x07411039:
  98                 return ("SiS 741 host to AGP bridge");
  99         case 0x07451039:
 100                 return ("SiS 745 host to AGP bridge");
 101         case 0x07461039:
 102                 return ("SiS 746 host to AGP bridge");
 103         };
 104
 105         return NULL;
 106 }
 107
 108 static int
 109 agp_sis_probe(device_t dev)
 110 {
 111         const char *desc;
 112
 113         if (resource_disabled("agp", device_get_unit(dev)))
 114                 return (ENXIO);
 115         desc = agp_sis_match(dev);
 116         if (desc) {
 117                 device_verbose(dev);
 118                 device_set_desc(dev, desc);
 119                 return BUS_PROBE_DEFAULT;
 120         }
 121
 122         return ENXIO;
 123 }
 124
 125 static int
 126 agp_sis_attach(device_t dev)
 127 {
 128         struct agp_sis_softc *sc = device_get_softc(dev);
 129         struct agp_gatt *gatt;
 130         int error;
 131
 132         error = agp_generic_attach(dev);
 133         if (error)
 134                 return error;
 135
 136         sc->initial_aperture = AGP_GET_APERTURE(dev);
 137
 138         for (;;) {
 139                 gatt = agp_alloc_gatt(dev);
 140                 if (gatt)
 141                         break;
 142
 143                 /*
 144                  * Probably contigmalloc failure. Try reducing the
 145                  * aperture so that the gatt size reduces.
 146                  */
 147                 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
 148                         agp_generic_detach(dev);
 149                         return ENOMEM;
 150                 }
 151         }
 152         sc->gatt = gatt;
 153
 154         /* Install the gatt. */
 155         pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4);
 156
 157         /* Enable the aperture. */
 158         pci_write_config(dev, AGP_SIS_WINCTRL,
 159                          pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1);
 160
 161         /*
 162          * Enable the TLB and make it automatically invalidate entries
 163          * when the GATT is written.
 164          */
 165         pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1);
 166
 167         return 0;
 168 }
 169
 170 static int
 171 agp_sis_detach(device_t dev)
 172 {
 173         struct agp_sis_softc *sc = device_get_softc(dev);
 174
 175         agp_free_cdev(dev);
 176
 177         /* Disable the aperture.. */
 178         pci_write_config(dev, AGP_SIS_WINCTRL,
 179                          pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1);
 180
 181         /* and the TLB. */
 182         pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1);
 183
 184         /* Put the aperture back the way it started. */
 185         AGP_SET_APERTURE(dev, sc->initial_aperture);
 186
 187         agp_free_gatt(sc->gatt);
 188         agp_free_res(dev);
 189         return 0;
 190 }
 191
 192 static u_int32_t
 193 agp_sis_get_aperture(device_t dev)
 194 {
 195         int gws;
 196
 197         /*
 198          * The aperture size is equal to 4M<<gws.
 199          */
 200         gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4;
 201         return (4*1024*1024) << gws;
 202 }
 203
 204 static int
 205 agp_sis_set_aperture(device_t dev, u_int32_t aperture)
 206 {
 207         int gws;
 208
 209         /*
 210          * Check for a power of two and make sure its within the
 211          * programmable range.
 212          */
 213         if (aperture & (aperture - 1)
 214             || aperture < 4*1024*1024
 215             || aperture > 256*1024*1024)
 216                 return EINVAL;
 217
 218         gws = ffs(aperture / 4*1024*1024) - 1;
 219
 220         pci_write_config(dev, AGP_SIS_WINCTRL,
 221                          ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70)
 222                           | gws << 4), 1);
 223
 224         return 0;
 225 }
 226
 227 static int
 228 agp_sis_bind_page(device_t dev, int offset, vm_offset_t physical)
 229 {
 230         struct agp_sis_softc *sc = device_get_softc(dev);
 231
 232         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
 233                 return EINVAL;
 234
 235         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
 236         return 0;
 237 }
 238
 239 static int
 240 agp_sis_unbind_page(device_t dev, int offset)
 241 {
 242         struct agp_sis_softc *sc = device_get_softc(dev);
 243
 244         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
 245                 return EINVAL;
 246
 247         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
 248         return 0;
 249 }
 250
 251 static void
 252 agp_sis_flush_tlb(device_t dev)
 253 {
 254         pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1);
 255 }
 256
 257 static device_method_t agp_sis_methods[] = {
 258         /* Device interface */
 259         DEVMETHOD(device_probe,         agp_sis_probe),
 260         DEVMETHOD(device_attach,        agp_sis_attach),
 261         DEVMETHOD(device_detach,        agp_sis_detach),
 262         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
 263         DEVMETHOD(device_suspend,       bus_generic_suspend),
 264         DEVMETHOD(device_resume,        bus_generic_resume),
 265
 266         /* AGP interface */
 267         DEVMETHOD(agp_get_aperture,     agp_sis_get_aperture),
 268         DEVMETHOD(agp_set_aperture,     agp_sis_set_aperture),
 269         DEVMETHOD(agp_bind_page,        agp_sis_bind_page),
 270         DEVMETHOD(agp_unbind_page,      agp_sis_unbind_page),
 271         DEVMETHOD(agp_flush_tlb,        agp_sis_flush_tlb),
 272         DEVMETHOD(agp_enable,           agp_generic_enable),
 273         DEVMETHOD(agp_alloc_memory,     agp_generic_alloc_memory),
 274         DEVMETHOD(agp_free_memory,      agp_generic_free_memory),
 275         DEVMETHOD(agp_bind_memory,      agp_generic_bind_memory),
 276         DEVMETHOD(agp_unbind_memory,    agp_generic_unbind_memory),
 277
 278         { 0, 0 }
 279 };
 280
 281 static driver_t agp_sis_driver = {
 282         "agp",
 283         agp_sis_methods,
 284         sizeof(struct agp_sis_softc),
 285 };
 286
 287 static devclass_t agp_devclass;
 288
 289 DRIVER_MODULE(agp_sis, pci, agp_sis_driver, agp_devclass, 0, 0);
 290 MODULE_DEPEND(agp_sis, agp, 1, 1, 1);
 291 MODULE_DEPEND(agp_sis, pci, 1, 1, 1);