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: stable/10/sys/dev/agp/agp_sis.c 244926 2013-01-01 18:16:49Z antoine $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/malloc.h>
   33 #include <sys/kernel.h>
   34 #include <sys/module.h>
   35 #include <sys/bus.h>
   36 #include <sys/lock.h>
   37 #include <sys/mutex.h>
   38 #include <sys/proc.h>
   39 
   40 #include <dev/agp/agppriv.h>
   41 #include <dev/agp/agpreg.h>
   42 #include <dev/pci/pcivar.h>
   43 #include <dev/pci/pcireg.h>
   44 
   45 #include <vm/vm.h>
   46 #include <vm/vm_object.h>
   47 #include <vm/pmap.h>
   48 
   49 struct agp_sis_softc {
   50         struct agp_softc agp;
   51         u_int32_t       initial_aperture; /* aperture size at startup */
   52         struct agp_gatt *gatt;
   53 };
   54 
   55 static const char*
   56 agp_sis_match(device_t dev)
   57 {
   58         if (pci_get_class(dev) != PCIC_BRIDGE
   59             || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
   60                 return NULL;
   61 
   62         if (agp_find_caps(dev) == 0)
   63                 return NULL;
   64 
   65         switch (pci_get_devid(dev)) {
   66         case 0x00011039:
   67                 return ("SiS 5591 host to AGP bridge");
   68         case 0x05301039:
   69                 return ("SiS 530 host to AGP bridge");
   70         case 0x05401039:
   71                 return ("SiS 540 host to AGP bridge");
   72         case 0x05501039:
   73                 return ("SiS 550 host to AGP bridge");
   74         case 0x06201039:
   75                 return ("SiS 620 host to AGP bridge");
   76         case 0x06301039:
   77                 return ("SiS 630 host to AGP bridge");
   78         case 0x06451039:
   79                 return ("SiS 645 host to AGP bridge");
   80         case 0x06461039:
   81                 return ("SiS 645DX host to AGP bridge");
   82         case 0x06481039:
   83                 return ("SiS 648 host to AGP bridge");
   84         case 0x06501039:
   85                 return ("SiS 650 host to AGP bridge");
   86         case 0x06511039:
   87                 return ("SiS 651 host to AGP bridge");
   88         case 0x06551039:
   89                 return ("SiS 655 host to AGP bridge");
   90         case 0x06611039:
   91                 return ("SiS 661 host to AGP bridge");
   92         case 0x07301039:
   93                 return ("SiS 730 host to AGP bridge");
   94         case 0x07351039:
   95                 return ("SiS 735 host to AGP bridge");
   96         case 0x07401039:
   97                 return ("SiS 740 host to AGP bridge");
   98         case 0x07411039:
   99                 return ("SiS 741 host to AGP bridge");
  100         case 0x07451039:
  101                 return ("SiS 745 host to AGP bridge");
  102         case 0x07461039:
  103                 return ("SiS 746 host to AGP bridge");
  104         }
  105 
  106         return NULL;
  107 }
  108 
  109 static int
  110 agp_sis_probe(device_t dev)
  111 {
  112         const char *desc;
  113 
  114         if (resource_disabled("agp", device_get_unit(dev)))
  115                 return (ENXIO);
  116         desc = agp_sis_match(dev);
  117         if (desc) {
  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, vm_offset_t offset, vm_offset_t physical)
  229 {
  230         struct agp_sis_softc *sc = device_get_softc(dev);
  231 
  232         if (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, vm_offset_t offset)
  241 {
  242         struct agp_sis_softc *sc = device_get_softc(dev);
  243 
  244         if (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, hostb, 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);

Cache object: 3bbe4027dc0fe467d40a7d97ff58be3a


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