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 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/6.0/sys/pci/agp_ali.c 142646 2005-02-27 13:05:34Z cognet $");
   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/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_ali_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_ali_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 0x167110b9:
   69                 return ("Ali M1671 host to AGP bridge");
   70         case 0x154110b9:
   71                 return ("Ali M1541 host to AGP bridge");
   72         case 0x162110b9:
   73                 return ("Ali M1621 host to AGP bridge");
   74         };
   75 
   76         return NULL;
   77 }
   78 
   79 static int
   80 agp_ali_probe(device_t dev)
   81 {
   82         const char *desc;
   83 
   84         if (resource_disabled("agp", device_get_unit(dev)))
   85                 return (ENXIO);
   86         desc = agp_ali_match(dev);
   87         if (desc) {
   88                 device_verbose(dev);
   89                 device_set_desc(dev, desc);
   90                 return BUS_PROBE_DEFAULT;
   91         }
   92 
   93         return ENXIO;
   94 }
   95 
   96 static int
   97 agp_ali_attach(device_t dev)
   98 {
   99         struct agp_ali_softc *sc = device_get_softc(dev);
  100         struct agp_gatt *gatt;
  101         int error;
  102         u_int32_t attbase;
  103 
  104         error = agp_generic_attach(dev);
  105         if (error)
  106                 return error;
  107 
  108         sc->initial_aperture = AGP_GET_APERTURE(dev);
  109         if (sc->initial_aperture == 0) {
  110                 device_printf(dev, "bad initial aperture size, disabling\n");
  111                 return ENXIO;
  112         }
  113 
  114         for (;;) {
  115                 gatt = agp_alloc_gatt(dev);
  116                 if (gatt)
  117                         break;
  118 
  119                 /*
  120                  * Probably contigmalloc failure. Try reducing the
  121                  * aperture so that the gatt size reduces.
  122                  */
  123                 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
  124                         agp_generic_detach(dev);
  125                         return ENOMEM;
  126                 }
  127         }
  128         sc->gatt = gatt;
  129 
  130         /* Install the gatt. */
  131         attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
  132         pci_write_config(dev, AGP_ALI_ATTBASE, gatt->ag_physical |
  133             (attbase & 0xfff), 4);
  134         
  135         /* Enable the TLB. */
  136         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
  137 
  138         return 0;
  139 }
  140 
  141 static int
  142 agp_ali_detach(device_t dev)
  143 {
  144         struct agp_ali_softc *sc = device_get_softc(dev);
  145         int error;
  146         u_int32_t attbase;
  147 
  148         error = agp_generic_detach(dev);
  149         if (error)
  150                 return error;
  151 
  152         /* Disable the TLB.. */
  153         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
  154 
  155         /* Put the aperture back the way it started. */
  156         AGP_SET_APERTURE(dev, sc->initial_aperture);
  157         attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
  158         pci_write_config(dev, AGP_ALI_ATTBASE, attbase & 0xfff, 4);
  159 
  160         agp_free_gatt(sc->gatt);
  161         return 0;
  162 }
  163 
  164 #define M 1024*1024
  165 
  166 static u_int32_t agp_ali_table[] = {
  167         0,                      /* 0 - invalid */
  168         1,                      /* 1 - invalid */
  169         2,                      /* 2 - invalid */
  170         4*M,                    /* 3 - invalid */
  171         8*M,                    /* 4 - invalid */
  172         0,                      /* 5 - invalid */
  173         16*M,                   /* 6 - invalid */
  174         32*M,                   /* 7 - invalid */
  175         64*M,                   /* 8 - invalid */
  176         128*M,                  /* 9 - invalid */
  177         256*M,                  /* 10 - invalid */
  178 };
  179 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0]))
  180 
  181 static u_int32_t
  182 agp_ali_get_aperture(device_t dev)
  183 {
  184         /*
  185          * The aperture size is derived from the low bits of attbase.
  186          * I'm not sure this is correct..
  187          */
  188         int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xf;
  189         if (i >= agp_ali_table_size)
  190                 return 0;
  191         return agp_ali_table[i];
  192 }
  193 
  194 static int
  195 agp_ali_set_aperture(device_t dev, u_int32_t aperture)
  196 {
  197         int i;
  198         u_int32_t attbase;
  199 
  200         for (i = 0; i < agp_ali_table_size; i++)
  201                 if (agp_ali_table[i] == aperture)
  202                         break;
  203         if (i == agp_ali_table_size)
  204                 return EINVAL;
  205 
  206         attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
  207         pci_write_config(dev, AGP_ALI_ATTBASE, (attbase & ~0xf) | i, 4);
  208         return 0;
  209 }
  210 
  211 static int
  212 agp_ali_bind_page(device_t dev, int offset, vm_offset_t physical)
  213 {
  214         struct agp_ali_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] = physical;
  220         return 0;
  221 }
  222 
  223 static int
  224 agp_ali_unbind_page(device_t dev, int offset)
  225 {
  226         struct agp_ali_softc *sc = device_get_softc(dev);
  227 
  228         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
  229                 return EINVAL;
  230 
  231         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
  232         return 0;
  233 }
  234 
  235 static void
  236 agp_ali_flush_tlb(device_t dev)
  237 {
  238         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
  239         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
  240 }
  241 
  242 static device_method_t agp_ali_methods[] = {
  243         /* Device interface */
  244         DEVMETHOD(device_probe,         agp_ali_probe),
  245         DEVMETHOD(device_attach,        agp_ali_attach),
  246         DEVMETHOD(device_detach,        agp_ali_detach),
  247         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  248         DEVMETHOD(device_suspend,       bus_generic_suspend),
  249         DEVMETHOD(device_resume,        bus_generic_resume),
  250 
  251         /* AGP interface */
  252         DEVMETHOD(agp_get_aperture,     agp_ali_get_aperture),
  253         DEVMETHOD(agp_set_aperture,     agp_ali_set_aperture),
  254         DEVMETHOD(agp_bind_page,        agp_ali_bind_page),
  255         DEVMETHOD(agp_unbind_page,      agp_ali_unbind_page),
  256         DEVMETHOD(agp_flush_tlb,        agp_ali_flush_tlb),
  257         DEVMETHOD(agp_enable,           agp_generic_enable),
  258         DEVMETHOD(agp_alloc_memory,     agp_generic_alloc_memory),
  259         DEVMETHOD(agp_free_memory,      agp_generic_free_memory),
  260         DEVMETHOD(agp_bind_memory,      agp_generic_bind_memory),
  261         DEVMETHOD(agp_unbind_memory,    agp_generic_unbind_memory),
  262 
  263         { 0, 0 }
  264 };
  265 
  266 static driver_t agp_ali_driver = {
  267         "agp",
  268         agp_ali_methods,
  269         sizeof(struct agp_ali_softc),
  270 };
  271 
  272 static devclass_t agp_devclass;
  273 
  274 DRIVER_MODULE(agp_ali, pci, agp_ali_driver, agp_devclass, 0, 0);
  275 MODULE_DEPEND(agp_ali, agp, 1, 1, 1);
  276 MODULE_DEPEND(agp_ali, pci, 1, 1, 1);

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

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