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: releng/5.1/sys/pci/agp_sis.c 113506 2003-04-15 06:37:30Z mdodd $
   27  */
   28 
   29 #include "opt_bus.h"
   30 
   31 #include <sys/param.h>
   32 #include <sys/systm.h>
   33 #include <sys/malloc.h>
   34 #include <sys/kernel.h>
   35 #include <sys/bus.h>
   36 #include <sys/lock.h>
   37 #include <sys/lockmgr.h>
   38 #include <sys/mutex.h>
   39 #include <sys/proc.h>
   40 
   41 #include <pci/pcivar.h>
   42 #include <pci/pcireg.h>
   43 #include <pci/agppriv.h>
   44 #include <pci/agpreg.h>
   45 
   46 #include <vm/vm.h>
   47 #include <vm/vm_object.h>
   48 #include <vm/pmap.h>
   49 
   50 struct agp_sis_softc {
   51         struct agp_softc agp;
   52         u_int32_t       initial_aperture; /* aperture size at startup */
   53         struct agp_gatt *gatt;
   54 };
   55 
   56 static const char*
   57 agp_sis_match(device_t dev)
   58 {
   59         if (pci_get_class(dev) != PCIC_BRIDGE
   60             || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
   61                 return NULL;
   62 
   63         if (agp_find_caps(dev) == 0)
   64                 return NULL;
   65 
   66         switch (pci_get_devid(dev)) {
   67         case 0x00011039:
   68                 return ("SiS 5591 host to AGP bridge");
   69         case 0x06481039:
   70                 return ("SiS 648 host to AGP bridge");
   71         };
   72 
   73         if (pci_get_vendor(dev) == 0x1039)
   74                 return ("SIS Generic host to PCI bridge");
   75 
   76         return NULL;
   77 }
   78 
   79 static int
   80 agp_sis_probe(device_t dev)
   81 {
   82         const char *desc;
   83 
   84         desc = agp_sis_match(dev);
   85         if (desc) {
   86                 device_verbose(dev);
   87                 device_set_desc(dev, desc);
   88                 return 0;
   89         }
   90 
   91         return ENXIO;
   92 }
   93 
   94 static int
   95 agp_sis_attach(device_t dev)
   96 {
   97         struct agp_sis_softc *sc = device_get_softc(dev);
   98         struct agp_gatt *gatt;
   99         int error;
  100 
  101         error = agp_generic_attach(dev);
  102         if (error)
  103                 return error;
  104 
  105         sc->initial_aperture = AGP_GET_APERTURE(dev);
  106 
  107         for (;;) {
  108                 gatt = agp_alloc_gatt(dev);
  109                 if (gatt)
  110                         break;
  111 
  112                 /*
  113                  * Probably contigmalloc failure. Try reducing the
  114                  * aperture so that the gatt size reduces.
  115                  */
  116                 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
  117                         agp_generic_detach(dev);
  118                         return ENOMEM;
  119                 }
  120         }
  121         sc->gatt = gatt;
  122 
  123         /* Install the gatt. */
  124         pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4);
  125         
  126         /* Enable the aperture. */
  127         pci_write_config(dev, AGP_SIS_WINCTRL,
  128                          pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1);
  129 
  130         /*
  131          * Enable the TLB and make it automatically invalidate entries
  132          * when the GATT is written.
  133          */
  134         pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1);
  135 
  136         return 0;
  137 }
  138 
  139 static int
  140 agp_sis_detach(device_t dev)
  141 {
  142         struct agp_sis_softc *sc = device_get_softc(dev);
  143         int error;
  144 
  145         error = agp_generic_detach(dev);
  146         if (error)
  147                 return error;
  148 
  149         /* Disable the aperture.. */
  150         pci_write_config(dev, AGP_SIS_WINCTRL,
  151                          pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1);
  152 
  153         /* and the TLB. */
  154         pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1);
  155 
  156         /* Put the aperture back the way it started. */
  157         AGP_SET_APERTURE(dev, sc->initial_aperture);
  158 
  159         agp_free_gatt(sc->gatt);
  160         return 0;
  161 }
  162 
  163 static u_int32_t
  164 agp_sis_get_aperture(device_t dev)
  165 {
  166         int gws;
  167 
  168         /*
  169          * The aperture size is equal to 4M<<gws.
  170          */
  171         gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4;
  172         return (4*1024*1024) << gws;
  173 }
  174 
  175 static int
  176 agp_sis_set_aperture(device_t dev, u_int32_t aperture)
  177 {
  178         int gws;
  179 
  180         /*
  181          * Check for a power of two and make sure its within the
  182          * programmable range.
  183          */
  184         if (aperture & (aperture - 1)
  185             || aperture < 4*1024*1024
  186             || aperture > 256*1024*1024)
  187                 return EINVAL;
  188 
  189         gws = ffs(aperture / 4*1024*1024) - 1;
  190         
  191         pci_write_config(dev, AGP_SIS_WINCTRL,
  192                          ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70)
  193                           | gws << 4), 1);
  194 
  195         return 0;
  196 }
  197 
  198 static int
  199 agp_sis_bind_page(device_t dev, int offset, vm_offset_t physical)
  200 {
  201         struct agp_sis_softc *sc = device_get_softc(dev);
  202 
  203         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
  204                 return EINVAL;
  205 
  206         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
  207         return 0;
  208 }
  209 
  210 static int
  211 agp_sis_unbind_page(device_t dev, int offset)
  212 {
  213         struct agp_sis_softc *sc = device_get_softc(dev);
  214 
  215         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
  216                 return EINVAL;
  217 
  218         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
  219         return 0;
  220 }
  221 
  222 static void
  223 agp_sis_flush_tlb(device_t dev)
  224 {
  225         pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1);
  226 }
  227 
  228 static device_method_t agp_sis_methods[] = {
  229         /* Device interface */
  230         DEVMETHOD(device_probe,         agp_sis_probe),
  231         DEVMETHOD(device_attach,        agp_sis_attach),
  232         DEVMETHOD(device_detach,        agp_sis_detach),
  233         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  234         DEVMETHOD(device_suspend,       bus_generic_suspend),
  235         DEVMETHOD(device_resume,        bus_generic_resume),
  236 
  237         /* AGP interface */
  238         DEVMETHOD(agp_get_aperture,     agp_sis_get_aperture),
  239         DEVMETHOD(agp_set_aperture,     agp_sis_set_aperture),
  240         DEVMETHOD(agp_bind_page,        agp_sis_bind_page),
  241         DEVMETHOD(agp_unbind_page,      agp_sis_unbind_page),
  242         DEVMETHOD(agp_flush_tlb,        agp_sis_flush_tlb),
  243         DEVMETHOD(agp_enable,           agp_generic_enable),
  244         DEVMETHOD(agp_alloc_memory,     agp_generic_alloc_memory),
  245         DEVMETHOD(agp_free_memory,      agp_generic_free_memory),
  246         DEVMETHOD(agp_bind_memory,      agp_generic_bind_memory),
  247         DEVMETHOD(agp_unbind_memory,    agp_generic_unbind_memory),
  248 
  249         { 0, 0 }
  250 };
  251 
  252 static driver_t agp_sis_driver = {
  253         "agp",
  254         agp_sis_methods,
  255         sizeof(struct agp_sis_softc),
  256 };
  257 
  258 static devclass_t agp_devclass;
  259 
  260 DRIVER_MODULE(agp_sis, pci, agp_sis_driver, agp_devclass, 0, 0);
  261 MODULE_DEPEND(agp_sis, agp, 1, 1, 1);
  262 MODULE_DEPEND(agp_sis, pci, 1, 1, 1);

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FreeBSD/Linux Kernel Cross Reference sys/pci/agp_sis.c

FreeBSD/Linux Kernel Cross Reference
sys/pci/agp_sis.c