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 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/8.4/sys/dev/agp/agp_sis.c 194017 2009-06-11 17:06:07Z avg $");
   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/module.h>
   37 #include <sys/bus.h>
   38 #include <sys/lock.h>
   39 #include <sys/mutex.h>
   40 #include <sys/proc.h>
   41 
   42 #include <dev/agp/agppriv.h>
   43 #include <dev/agp/agpreg.h>
   44 #include <dev/pci/pcivar.h>
   45 #include <dev/pci/pcireg.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 0x05301039:
   71                 return ("SiS 530 host to AGP bridge");
   72         case 0x05401039:
   73                 return ("SiS 540 host to AGP bridge");
   74         case 0x05501039:
   75                 return ("SiS 550 host to AGP bridge");
   76         case 0x06201039:
   77                 return ("SiS 620 host to AGP bridge");
   78         case 0x06301039:
   79                 return ("SiS 630 host to AGP bridge");
   80         case 0x06451039:
   81                 return ("SiS 645 host to AGP bridge");
   82         case 0x06461039:
   83                 return ("SiS 645DX host to AGP bridge");
   84         case 0x06481039:
   85                 return ("SiS 648 host to AGP bridge");
   86         case 0x06501039:
   87                 return ("SiS 650 host to AGP bridge");
   88         case 0x06511039:
   89                 return ("SiS 651 host to AGP bridge");
   90         case 0x06551039:
   91                 return ("SiS 655 host to AGP bridge");
   92         case 0x06611039:
   93                 return ("SiS 661 host to AGP bridge");
   94         case 0x07301039:
   95                 return ("SiS 730 host to AGP bridge");
   96         case 0x07351039:
   97                 return ("SiS 735 host to AGP bridge");
   98         case 0x07401039:
   99                 return ("SiS 740 host to AGP bridge");
  100         case 0x07411039:
  101                 return ("SiS 741 host to AGP bridge");
  102         case 0x07451039:
  103                 return ("SiS 745 host to AGP bridge");
  104         case 0x07461039:
  105                 return ("SiS 746 host to AGP bridge");
  106         };
  107 
  108         return NULL;
  109 }
  110 
  111 static int
  112 agp_sis_probe(device_t dev)
  113 {
  114         const char *desc;
  115 
  116         if (resource_disabled("agp", device_get_unit(dev)))
  117                 return (ENXIO);
  118         desc = agp_sis_match(dev);
  119         if (desc) {
  120                 device_set_desc(dev, desc);
  121                 return BUS_PROBE_DEFAULT;
  122         }
  123 
  124         return ENXIO;
  125 }
  126 
  127 static int
  128 agp_sis_attach(device_t dev)
  129 {
  130         struct agp_sis_softc *sc = device_get_softc(dev);
  131         struct agp_gatt *gatt;
  132         int error;
  133 
  134         error = agp_generic_attach(dev);
  135         if (error)
  136                 return error;
  137 
  138         sc->initial_aperture = AGP_GET_APERTURE(dev);
  139 
  140         for (;;) {
  141                 gatt = agp_alloc_gatt(dev);
  142                 if (gatt)
  143                         break;
  144 
  145                 /*
  146                  * Probably contigmalloc failure. Try reducing the
  147                  * aperture so that the gatt size reduces.
  148                  */
  149                 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
  150                         agp_generic_detach(dev);
  151                         return ENOMEM;
  152                 }
  153         }
  154         sc->gatt = gatt;
  155 
  156         /* Install the gatt. */
  157         pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4);
  158         
  159         /* Enable the aperture. */
  160         pci_write_config(dev, AGP_SIS_WINCTRL,
  161                          pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1);
  162 
  163         /*
  164          * Enable the TLB and make it automatically invalidate entries
  165          * when the GATT is written.
  166          */
  167         pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1);
  168 
  169         return 0;
  170 }
  171 
  172 static int
  173 agp_sis_detach(device_t dev)
  174 {
  175         struct agp_sis_softc *sc = device_get_softc(dev);
  176 
  177         agp_free_cdev(dev);
  178 
  179         /* Disable the aperture.. */
  180         pci_write_config(dev, AGP_SIS_WINCTRL,
  181                          pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1);
  182 
  183         /* and the TLB. */
  184         pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1);
  185 
  186         /* Put the aperture back the way it started. */
  187         AGP_SET_APERTURE(dev, sc->initial_aperture);
  188 
  189         agp_free_gatt(sc->gatt);
  190         agp_free_res(dev);
  191         return 0;
  192 }
  193 
  194 static u_int32_t
  195 agp_sis_get_aperture(device_t dev)
  196 {
  197         int gws;
  198 
  199         /*
  200          * The aperture size is equal to 4M<<gws.
  201          */
  202         gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4;
  203         return (4*1024*1024) << gws;
  204 }
  205 
  206 static int
  207 agp_sis_set_aperture(device_t dev, u_int32_t aperture)
  208 {
  209         int gws;
  210 
  211         /*
  212          * Check for a power of two and make sure its within the
  213          * programmable range.
  214          */
  215         if (aperture & (aperture - 1)
  216             || aperture < 4*1024*1024
  217             || aperture > 256*1024*1024)
  218                 return EINVAL;
  219 
  220         gws = ffs(aperture / 4*1024*1024) - 1;
  221         
  222         pci_write_config(dev, AGP_SIS_WINCTRL,
  223                          ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70)
  224                           | gws << 4), 1);
  225 
  226         return 0;
  227 }
  228 
  229 static int
  230 agp_sis_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
  231 {
  232         struct agp_sis_softc *sc = device_get_softc(dev);
  233 
  234         if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
  235                 return EINVAL;
  236 
  237         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
  238         return 0;
  239 }
  240 
  241 static int
  242 agp_sis_unbind_page(device_t dev, vm_offset_t offset)
  243 {
  244         struct agp_sis_softc *sc = device_get_softc(dev);
  245 
  246         if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
  247                 return EINVAL;
  248 
  249         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
  250         return 0;
  251 }
  252 
  253 static void
  254 agp_sis_flush_tlb(device_t dev)
  255 {
  256         pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1);
  257 }
  258 
  259 static device_method_t agp_sis_methods[] = {
  260         /* Device interface */
  261         DEVMETHOD(device_probe,         agp_sis_probe),
  262         DEVMETHOD(device_attach,        agp_sis_attach),
  263         DEVMETHOD(device_detach,        agp_sis_detach),
  264         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  265         DEVMETHOD(device_suspend,       bus_generic_suspend),
  266         DEVMETHOD(device_resume,        bus_generic_resume),
  267 
  268         /* AGP interface */
  269         DEVMETHOD(agp_get_aperture,     agp_sis_get_aperture),
  270         DEVMETHOD(agp_set_aperture,     agp_sis_set_aperture),
  271         DEVMETHOD(agp_bind_page,        agp_sis_bind_page),
  272         DEVMETHOD(agp_unbind_page,      agp_sis_unbind_page),
  273         DEVMETHOD(agp_flush_tlb,        agp_sis_flush_tlb),
  274         DEVMETHOD(agp_enable,           agp_generic_enable),
  275         DEVMETHOD(agp_alloc_memory,     agp_generic_alloc_memory),
  276         DEVMETHOD(agp_free_memory,      agp_generic_free_memory),
  277         DEVMETHOD(agp_bind_memory,      agp_generic_bind_memory),
  278         DEVMETHOD(agp_unbind_memory,    agp_generic_unbind_memory),
  279 
  280         { 0, 0 }
  281 };
  282 
  283 static driver_t agp_sis_driver = {
  284         "agp",
  285         agp_sis_methods,
  286         sizeof(struct agp_sis_softc),
  287 };
  288 
  289 static devclass_t agp_devclass;
  290 
  291 DRIVER_MODULE(agp_sis, hostb, agp_sis_driver, agp_devclass, 0, 0);
  292 MODULE_DEPEND(agp_sis, agp, 1, 1, 1);
  293 MODULE_DEPEND(agp_sis, pci, 1, 1, 1);

Cache object: addc7e49530991c2d0b1f495c245f9d1


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