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/pci/agp_amd64.c

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    1 /*-
    2  * Copyright (c) 2004 Jung-uk Kim
    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/5.3/sys/pci/agp_amd64.c 133852 2004-08-16 12:25:48Z obrien $");
   29 
   30 #include "opt_bus.h"
   31 #ifdef __i386__
   32 #include "opt_agp.h"
   33 #endif
   34 
   35 #include <sys/param.h>
   36 #include <sys/systm.h>
   37 #include <sys/malloc.h>
   38 #include <sys/kernel.h>
   39 #include <sys/module.h>
   40 #include <sys/bus.h>
   41 #include <sys/lock.h>
   42 #include <sys/mutex.h>
   43 #include <sys/proc.h>
   44 
   45 #include <dev/pci/pcivar.h>
   46 #include <dev/pci/pcireg.h>
   47 #include <pci/agppriv.h>
   48 #include <pci/agpreg.h>
   49 
   50 #include <vm/vm.h>
   51 #include <vm/vm_object.h>
   52 #include <vm/pmap.h>
   53 #include <machine/bus.h>
   54 #include <machine/resource.h>
   55 #include <sys/rman.h>
   56 
   57 /* XXX */
   58 extern void pci_cfgregwrite(int, int, int, int, uint32_t, int);
   59 extern uint32_t pci_cfgregread(int, int, int, int, int);
   60 
   61 MALLOC_DECLARE(M_AGP);
   62 
   63 #define AMD64_MAX_MCTRL         8
   64 
   65 struct agp_amd64_softc {
   66         struct agp_softc        agp;
   67         uint32_t        initial_aperture; /* aperture size at startup */
   68         struct agp_gatt *gatt;
   69         int             mctrl[AMD64_MAX_MCTRL];
   70         int             n_mctrl;
   71 };
   72 
   73 static const char*
   74 agp_amd64_match(device_t dev)
   75 {
   76         if (pci_get_class(dev) != PCIC_BRIDGE
   77             || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
   78                 return NULL;
   79 
   80         if (agp_find_caps(dev) == 0)
   81                 return NULL;
   82 
   83         switch (pci_get_devid(dev)) {
   84         case 0x74541022:
   85                 return ("AMD 8151 AGP graphics tunnel");
   86         case 0x10221039:
   87                 return ("SiS 755 host to AGP bridge");
   88         case 0x02041106:
   89                 return ("VIA 8380 host to PCI bridge");
   90         case 0x31881106:
   91                 return ("VIA 8385 host to PCI bridge");
   92         };
   93 
   94         return NULL;
   95 }
   96 
   97 static int
   98 agp_amd64_probe(device_t dev)
   99 {
  100         const char *desc;
  101 
  102         if (resource_disabled("agp", device_get_unit(dev)))
  103                 return ENXIO;
  104         if ((desc = agp_amd64_match(dev))) {
  105                 device_verbose(dev);
  106                 device_set_desc(dev, desc);
  107                 return 0;
  108         }
  109 
  110         return ENXIO;
  111 }
  112 
  113 static int
  114 agp_amd64_attach(device_t dev)
  115 {
  116         struct agp_amd64_softc *sc = device_get_softc(dev);
  117         struct agp_gatt *gatt;
  118         int i, n, error;
  119 
  120         for (i = 0, n = 0; i < PCI_SLOTMAX && n < AMD64_MAX_MCTRL; i++)
  121                 if (pci_cfgregread(0, i, 3, 0, 4) == 0x11031022) {
  122                         sc->mctrl[n] = i;
  123                         n++;
  124                 }
  125 
  126         if (n == 0)
  127                 return ENXIO;
  128 
  129         sc->n_mctrl = n;
  130 
  131         if (bootverbose)
  132                 printf("AMD64: %d Misc. Control unit(s) found.\n", sc->n_mctrl);
  133 
  134         if ((error = agp_generic_attach(dev)))
  135                 return error;
  136 
  137         sc->initial_aperture = AGP_GET_APERTURE(dev);
  138 
  139         for (;;) {
  140                 gatt = agp_alloc_gatt(dev);
  141                 if (gatt)
  142                         break;
  143 
  144                 /*
  145                  * Probably contigmalloc failure. Try reducing the
  146                  * aperture so that the gatt size reduces.
  147                  */
  148                 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
  149                         agp_generic_detach(dev);
  150                         return ENOMEM;
  151                 }
  152         }
  153         sc->gatt = gatt;
  154 
  155         /* Install the gatt and enable aperture. */
  156         for (i = 0; i < sc->n_mctrl; i++) {
  157                 pci_cfgregwrite(0, sc->mctrl[i], 3, AGP_AMD64_ATTBASE,
  158                     (uint32_t)(gatt->ag_physical >> 8) & AGP_AMD64_ATTBASE_MASK,
  159                     4);
  160                 pci_cfgregwrite(0, sc->mctrl[i], 3, AGP_AMD64_APCTRL,
  161                     (pci_cfgregread(0, sc->mctrl[i], 3, AGP_AMD64_APCTRL, 4) |
  162                     AGP_AMD64_APCTRL_GARTEN) &
  163                     ~(AGP_AMD64_APCTRL_DISGARTCPU | AGP_AMD64_APCTRL_DISGARTIO),
  164                     4);
  165         }
  166 
  167         agp_flush_cache();
  168 
  169         return 0;
  170 }
  171 
  172 static int
  173 agp_amd64_detach(device_t dev)
  174 {
  175         struct agp_amd64_softc *sc = device_get_softc(dev);
  176         int i, error;
  177 
  178         if ((error = agp_generic_detach(dev)))
  179                 return error;
  180 
  181         for (i = 0; i < sc->n_mctrl; i++)
  182                 pci_cfgregwrite(0, sc->mctrl[i], 3, AGP_AMD64_APCTRL,
  183                     pci_cfgregread(0, sc->mctrl[i], 3, AGP_AMD64_APCTRL, 4) &
  184                     ~AGP_AMD64_APCTRL_GARTEN, 4);
  185 
  186         AGP_SET_APERTURE(dev, sc->initial_aperture);
  187         agp_free_gatt(sc->gatt);
  188 
  189         return 0;
  190 }
  191 
  192 static uint32_t agp_amd64_table[] = {
  193         0x02000000,     /*   32 MB */
  194         0x04000000,     /*   64 MB */
  195         0x08000000,     /*  128 MB */
  196         0x10000000,     /*  256 MB */
  197         0x20000000,     /*  512 MB */
  198         0x40000000,     /* 1024 MB */
  199         0x80000000,     /* 2048 MB */
  200 };
  201 
  202 #define AGP_AMD64_TABLE_SIZE \
  203         (sizeof(agp_amd64_table) / sizeof(agp_amd64_table[0]))
  204 
  205 static uint32_t
  206 agp_amd64_get_aperture(device_t dev)
  207 {
  208         struct agp_amd64_softc *sc = device_get_softc(dev);
  209         uint32_t i;
  210 
  211         i = (pci_cfgregread(0, sc->mctrl[0], 3, AGP_AMD64_APCTRL, 4) &
  212                 AGP_AMD64_APCTRL_SIZE_MASK) >> 1;
  213 
  214         if (i >= AGP_AMD64_TABLE_SIZE)
  215                 return 0;
  216 
  217         return (agp_amd64_table[i]);
  218 }
  219 
  220 static int
  221 agp_amd64_set_aperture(device_t dev, uint32_t aperture)
  222 {
  223         struct agp_amd64_softc *sc = device_get_softc(dev);
  224         uint32_t i;
  225         int j;
  226 
  227         for (i = 0; i < AGP_AMD64_TABLE_SIZE; i++)
  228                 if (agp_amd64_table[i] == aperture)
  229                         break;
  230         if (i == AGP_AMD64_TABLE_SIZE)
  231                 return EINVAL;
  232 
  233         for (j = 0; j < sc->n_mctrl; j++)
  234                 pci_cfgregwrite(0, sc->mctrl[j], 3, AGP_AMD64_APCTRL,
  235                     (pci_cfgregread(0, sc->mctrl[j], 3, AGP_AMD64_APCTRL, 4) &
  236                     ~(AGP_AMD64_APCTRL_SIZE_MASK)) | (i << 1), 4);
  237 
  238         return 0;
  239 }
  240 
  241 static int
  242 agp_amd64_bind_page(device_t dev, int offset, vm_offset_t physical)
  243 {
  244         struct agp_amd64_softc *sc = device_get_softc(dev);
  245 
  246         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
  247                 return EINVAL;
  248 
  249         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
  250         return 0;
  251 }
  252 
  253 static int
  254 agp_amd64_unbind_page(device_t dev, int offset)
  255 {
  256         struct agp_amd64_softc *sc = device_get_softc(dev);
  257 
  258         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
  259                 return EINVAL;
  260 
  261         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
  262         return 0;
  263 }
  264 
  265 static void
  266 agp_amd64_flush_tlb(device_t dev)
  267 {
  268         struct agp_amd64_softc *sc = device_get_softc(dev);
  269         int i;
  270 
  271         for (i = 0; i < sc->n_mctrl; i++)
  272                 pci_cfgregwrite(0, sc->mctrl[i], 3, AGP_AMD64_CACHECTRL,
  273                     pci_cfgregread(0, sc->mctrl[i], 3, AGP_AMD64_CACHECTRL, 4) |
  274                     AGP_AMD64_CACHECTRL_INVGART, 4);
  275 }
  276 
  277 static device_method_t agp_amd64_methods[] = {
  278         /* Device interface */
  279         DEVMETHOD(device_probe,         agp_amd64_probe),
  280         DEVMETHOD(device_attach,        agp_amd64_attach),
  281         DEVMETHOD(device_detach,        agp_amd64_detach),
  282         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  283         DEVMETHOD(device_suspend,       bus_generic_suspend),
  284         DEVMETHOD(device_resume,        bus_generic_resume),
  285 
  286         /* AGP interface */
  287         DEVMETHOD(agp_get_aperture,     agp_amd64_get_aperture),
  288         DEVMETHOD(agp_set_aperture,     agp_amd64_set_aperture),
  289         DEVMETHOD(agp_bind_page,        agp_amd64_bind_page),
  290         DEVMETHOD(agp_unbind_page,      agp_amd64_unbind_page),
  291         DEVMETHOD(agp_flush_tlb,        agp_amd64_flush_tlb),
  292         DEVMETHOD(agp_enable,           agp_generic_enable),
  293         DEVMETHOD(agp_alloc_memory,     agp_generic_alloc_memory),
  294         DEVMETHOD(agp_free_memory,      agp_generic_free_memory),
  295         DEVMETHOD(agp_bind_memory,      agp_generic_bind_memory),
  296         DEVMETHOD(agp_unbind_memory,    agp_generic_unbind_memory),
  297 
  298         { 0, 0 }
  299 };
  300 
  301 static driver_t agp_amd64_driver = {
  302         "agp",
  303         agp_amd64_methods,
  304         sizeof(struct agp_amd64_softc),
  305 };
  306 
  307 static devclass_t agp_devclass;
  308 
  309 DRIVER_MODULE(agp_amd64, pci, agp_amd64_driver, agp_devclass, 0, 0);
  310 MODULE_DEPEND(agp_amd64, agp, 1, 1, 1);
  311 MODULE_DEPEND(agp_amd64, pci, 1, 1, 1);

Cache object: f37a362b3052ce38c33903061d1fc1ef


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