agp_ali.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/5.0/sys/pci/agp_ali.c 106860 2002-11-13 17:40:15Z mux $
   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_ali_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_ali_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 0x154110b9:
   68                 return ("Ali M1541 host to AGP bridge");
   69         };
   70 
   71         if (pci_get_vendor(dev) == 0x10b9)
   72                 return ("Ali Generic host to PCI bridge");
   73 
   74         return NULL;
   75 }
   76 
   77 static int
   78 agp_ali_probe(device_t dev)
   79 {
   80         const char *desc;
   81 
   82         desc = agp_ali_match(dev);
   83         if (desc) {
   84                 device_verbose(dev);
   85                 device_set_desc(dev, desc);
   86                 return 0;
   87         }
   88 
   89         return ENXIO;
   90 }
   91 
   92 static int
   93 agp_ali_attach(device_t dev)
   94 {
   95         struct agp_ali_softc *sc = device_get_softc(dev);
   96         struct agp_gatt *gatt;
   97         int error;
   98 
   99         error = agp_generic_attach(dev);
  100         if (error)
  101                 return error;
  102 
  103         sc->initial_aperture = AGP_GET_APERTURE(dev);
  104 
  105         for (;;) {
  106                 gatt = agp_alloc_gatt(dev);
  107                 if (gatt)
  108                         break;
  109 
  110                 /*
  111                  * Probably contigmalloc failure. Try reducing the
  112                  * aperture so that the gatt size reduces.
  113                  */
  114                 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
  115                         agp_generic_detach(dev);
  116                         return ENOMEM;
  117                 }
  118         }
  119         sc->gatt = gatt;
  120 
  121         /* Install the gatt. */
  122         pci_write_config(dev, AGP_ALI_ATTBASE,
  123                          (gatt->ag_physical
  124                           | (pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff)),
  125                          4);
  126         
  127         /* Enable the TLB. */
  128         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
  129 
  130         return 0;
  131 }
  132 
  133 static int
  134 agp_ali_detach(device_t dev)
  135 {
  136         struct agp_ali_softc *sc = device_get_softc(dev);
  137         int error;
  138 
  139         error = agp_generic_detach(dev);
  140         if (error)
  141                 return error;
  142 
  143         /* Disable the TLB.. */
  144         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
  145 
  146         /* Put the aperture back the way it started. */
  147         AGP_SET_APERTURE(dev, sc->initial_aperture);
  148         pci_write_config(dev, AGP_ALI_ATTBASE,
  149                          pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff,
  150                          4);
  151 
  152         agp_free_gatt(sc->gatt);
  153         return 0;
  154 }
  155 
  156 #define M 1024*1024
  157 
  158 static u_int32_t agp_ali_table[] = {
  159         0,                      /* 0 - invalid */
  160         1,                      /* 1 - invalid */
  161         2,                      /* 2 - invalid */
  162         4*M,                    /* 3 - invalid */
  163         8*M,                    /* 4 - invalid */
  164         0,                      /* 5 - invalid */
  165         16*M,                   /* 6 - invalid */
  166         32*M,                   /* 7 - invalid */
  167         64*M,                   /* 8 - invalid */
  168         128*M,                  /* 9 - invalid */
  169         256*M,                  /* 10 - invalid */
  170 };
  171 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0]))
  172 
  173 static u_int32_t
  174 agp_ali_get_aperture(device_t dev)
  175 {
  176         /*
  177          * The aperture size is derived from the low bits of attbase.
  178          * I'm not sure this is correct..
  179          */
  180         int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff;
  181         if (i >= agp_ali_table_size)
  182                 return 0;
  183         return agp_ali_table[i];
  184 }
  185 
  186 static int
  187 agp_ali_set_aperture(device_t dev, u_int32_t aperture)
  188 {
  189         int i;
  190 
  191         for (i = 0; i < agp_ali_table_size; i++)
  192                 if (agp_ali_table[i] == aperture)
  193                         break;
  194         if (i == agp_ali_table_size)
  195                 return EINVAL;
  196 
  197         pci_write_config(dev, AGP_ALI_ATTBASE,
  198                          ((pci_read_config(dev, AGP_ALI_ATTBASE, 4) & ~0xff)
  199                           | i), 4);
  200         return 0;
  201 }
  202 
  203 static int
  204 agp_ali_bind_page(device_t dev, int offset, vm_offset_t physical)
  205 {
  206         struct agp_ali_softc *sc = device_get_softc(dev);
  207 
  208         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
  209                 return EINVAL;
  210 
  211         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
  212         return 0;
  213 }
  214 
  215 static int
  216 agp_ali_unbind_page(device_t dev, int offset)
  217 {
  218         struct agp_ali_softc *sc = device_get_softc(dev);
  219 
  220         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
  221                 return EINVAL;
  222 
  223         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
  224         return 0;
  225 }
  226 
  227 static void
  228 agp_ali_flush_tlb(device_t dev)
  229 {
  230         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
  231         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
  232 }
  233 
  234 static device_method_t agp_ali_methods[] = {
  235         /* Device interface */
  236         DEVMETHOD(device_probe,         agp_ali_probe),
  237         DEVMETHOD(device_attach,        agp_ali_attach),
  238         DEVMETHOD(device_detach,        agp_ali_detach),
  239         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  240         DEVMETHOD(device_suspend,       bus_generic_suspend),
  241         DEVMETHOD(device_resume,        bus_generic_resume),
  242 
  243         /* AGP interface */
  244         DEVMETHOD(agp_get_aperture,     agp_ali_get_aperture),
  245         DEVMETHOD(agp_set_aperture,     agp_ali_set_aperture),
  246         DEVMETHOD(agp_bind_page,        agp_ali_bind_page),
  247         DEVMETHOD(agp_unbind_page,      agp_ali_unbind_page),
  248         DEVMETHOD(agp_flush_tlb,        agp_ali_flush_tlb),
  249         DEVMETHOD(agp_enable,           agp_generic_enable),
  250         DEVMETHOD(agp_alloc_memory,     agp_generic_alloc_memory),
  251         DEVMETHOD(agp_free_memory,      agp_generic_free_memory),
  252         DEVMETHOD(agp_bind_memory,      agp_generic_bind_memory),
  253         DEVMETHOD(agp_unbind_memory,    agp_generic_unbind_memory),
  254 
  255         { 0, 0 }
  256 };
  257 
  258 static driver_t agp_ali_driver = {
  259         "agp",
  260         agp_ali_methods,
  261         sizeof(struct agp_ali_softc),
  262 };
  263 
  264 static devclass_t agp_devclass;
  265 
  266 DRIVER_MODULE(agp_ali, pci, agp_ali_driver, agp_devclass, 0, 0);

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

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