The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/agp/agp_sis.c

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    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);

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