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 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/5.2/sys/pci/agp_sis.c 119288 2003-08-22 07:20:27Z imp $");
   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 #include <sys/lockmgr.h>
   39 #include <sys/mutex.h>
   40 #include <sys/proc.h>
   41 
   42 #include <dev/pci/pcivar.h>
   43 #include <dev/pci/pcireg.h>
   44 #include <pci/agppriv.h>
   45 #include <pci/agpreg.h>
   46 
   47 #include <vm/vm.h>
   48 #include <vm/vm_object.h>
   49 #include <vm/pmap.h>
   50 
   51 struct agp_sis_softc {
   52         struct agp_softc agp;
   53         u_int32_t       initial_aperture; /* aperture size at startup */
   54         struct agp_gatt *gatt;
   55 };
   56 
   57 static const char*
   58 agp_sis_match(device_t dev)
   59 {
   60         if (pci_get_class(dev) != PCIC_BRIDGE
   61             || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
   62                 return NULL;
   63 
   64         if (agp_find_caps(dev) == 0)
   65                 return NULL;
   66 
   67         switch (pci_get_devid(dev)) {
   68         case 0x00011039:
   69                 return ("SiS 5591 host to AGP bridge");
   70         case 0x06481039:
   71                 return ("SiS 648 host to AGP bridge");
   72         };
   73 
   74         if (pci_get_vendor(dev) == 0x1039)
   75                 return ("SIS Generic host to PCI bridge");
   76 
   77         return NULL;
   78 }
   79 
   80 static int
   81 agp_sis_probe(device_t dev)
   82 {
   83         const char *desc;
   84 
   85         desc = agp_sis_match(dev);
   86         if (desc) {
   87                 device_verbose(dev);
   88                 device_set_desc(dev, desc);
   89                 return 0;
   90         }
   91 
   92         return ENXIO;
   93 }
   94 
   95 static int
   96 agp_sis_attach(device_t dev)
   97 {
   98         struct agp_sis_softc *sc = device_get_softc(dev);
   99         struct agp_gatt *gatt;
  100         int error;
  101 
  102         error = agp_generic_attach(dev);
  103         if (error)
  104                 return error;
  105 
  106         sc->initial_aperture = AGP_GET_APERTURE(dev);
  107 
  108         for (;;) {
  109                 gatt = agp_alloc_gatt(dev);
  110                 if (gatt)
  111                         break;
  112 
  113                 /*
  114                  * Probably contigmalloc failure. Try reducing the
  115                  * aperture so that the gatt size reduces.
  116                  */
  117                 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
  118                         agp_generic_detach(dev);
  119                         return ENOMEM;
  120                 }
  121         }
  122         sc->gatt = gatt;
  123 
  124         /* Install the gatt. */
  125         pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4);
  126         
  127         /* Enable the aperture. */
  128         pci_write_config(dev, AGP_SIS_WINCTRL,
  129                          pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1);
  130 
  131         /*
  132          * Enable the TLB and make it automatically invalidate entries
  133          * when the GATT is written.
  134          */
  135         pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1);
  136 
  137         return 0;
  138 }
  139 
  140 static int
  141 agp_sis_detach(device_t dev)
  142 {
  143         struct agp_sis_softc *sc = device_get_softc(dev);
  144         int error;
  145 
  146         error = agp_generic_detach(dev);
  147         if (error)
  148                 return error;
  149 
  150         /* Disable the aperture.. */
  151         pci_write_config(dev, AGP_SIS_WINCTRL,
  152                          pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1);
  153 
  154         /* and the TLB. */
  155         pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1);
  156 
  157         /* Put the aperture back the way it started. */
  158         AGP_SET_APERTURE(dev, sc->initial_aperture);
  159 
  160         agp_free_gatt(sc->gatt);
  161         return 0;
  162 }
  163 
  164 static u_int32_t
  165 agp_sis_get_aperture(device_t dev)
  166 {
  167         int gws;
  168 
  169         /*
  170          * The aperture size is equal to 4M<<gws.
  171          */
  172         gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4;
  173         return (4*1024*1024) << gws;
  174 }
  175 
  176 static int
  177 agp_sis_set_aperture(device_t dev, u_int32_t aperture)
  178 {
  179         int gws;
  180 
  181         /*
  182          * Check for a power of two and make sure its within the
  183          * programmable range.
  184          */
  185         if (aperture & (aperture - 1)
  186             || aperture < 4*1024*1024
  187             || aperture > 256*1024*1024)
  188                 return EINVAL;
  189 
  190         gws = ffs(aperture / 4*1024*1024) - 1;
  191         
  192         pci_write_config(dev, AGP_SIS_WINCTRL,
  193                          ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70)
  194                           | gws << 4), 1);
  195 
  196         return 0;
  197 }
  198 
  199 static int
  200 agp_sis_bind_page(device_t dev, int offset, vm_offset_t physical)
  201 {
  202         struct agp_sis_softc *sc = device_get_softc(dev);
  203 
  204         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
  205                 return EINVAL;
  206 
  207         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
  208         return 0;
  209 }
  210 
  211 static int
  212 agp_sis_unbind_page(device_t dev, int offset)
  213 {
  214         struct agp_sis_softc *sc = device_get_softc(dev);
  215 
  216         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
  217                 return EINVAL;
  218 
  219         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
  220         return 0;
  221 }
  222 
  223 static void
  224 agp_sis_flush_tlb(device_t dev)
  225 {
  226         pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1);
  227 }
  228 
  229 static device_method_t agp_sis_methods[] = {
  230         /* Device interface */
  231         DEVMETHOD(device_probe,         agp_sis_probe),
  232         DEVMETHOD(device_attach,        agp_sis_attach),
  233         DEVMETHOD(device_detach,        agp_sis_detach),
  234         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  235         DEVMETHOD(device_suspend,       bus_generic_suspend),
  236         DEVMETHOD(device_resume,        bus_generic_resume),
  237 
  238         /* AGP interface */
  239         DEVMETHOD(agp_get_aperture,     agp_sis_get_aperture),
  240         DEVMETHOD(agp_set_aperture,     agp_sis_set_aperture),
  241         DEVMETHOD(agp_bind_page,        agp_sis_bind_page),
  242         DEVMETHOD(agp_unbind_page,      agp_sis_unbind_page),
  243         DEVMETHOD(agp_flush_tlb,        agp_sis_flush_tlb),
  244         DEVMETHOD(agp_enable,           agp_generic_enable),
  245         DEVMETHOD(agp_alloc_memory,     agp_generic_alloc_memory),
  246         DEVMETHOD(agp_free_memory,      agp_generic_free_memory),
  247         DEVMETHOD(agp_bind_memory,      agp_generic_bind_memory),
  248         DEVMETHOD(agp_unbind_memory,    agp_generic_unbind_memory),
  249 
  250         { 0, 0 }
  251 };
  252 
  253 static driver_t agp_sis_driver = {
  254         "agp",
  255         agp_sis_methods,
  256         sizeof(struct agp_sis_softc),
  257 };
  258 
  259 static devclass_t agp_devclass;
  260 
  261 DRIVER_MODULE(agp_sis, pci, agp_sis_driver, agp_devclass, 0, 0);
  262 MODULE_DEPEND(agp_sis, agp, 1, 1, 1);
  263 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