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/5.2/sys/pci/agp_ali.c 122513 2003-11-11 21:49:18Z anholt $");
   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/bus.h>
   37 #include <sys/lock.h>
   38 #include <sys/lockmgr.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 0x154110b9:
   69                 return ("Ali M1541 host to AGP bridge");
   70         };
   71 
   72         if (pci_get_vendor(dev) == 0x10b9)
   73                 return ("Ali Generic host to PCI bridge");
   74 
   75         return NULL;
   76 }
   77 
   78 static int
   79 agp_ali_probe(device_t dev)
   80 {
   81         const char *desc;
   82 
   83         desc = agp_ali_match(dev);
   84         if (desc) {
   85                 device_verbose(dev);
   86                 device_set_desc(dev, desc);
   87                 return 0;
   88         }
   89 
   90         return ENXIO;
   91 }
   92 
   93 static int
   94 agp_ali_attach(device_t dev)
   95 {
   96         struct agp_ali_softc *sc = device_get_softc(dev);
   97         struct agp_gatt *gatt;
   98         int error;
   99 
  100         error = agp_generic_attach(dev);
  101         if (error)
  102                 return error;
  103 
  104         sc->initial_aperture = AGP_GET_APERTURE(dev);
  105         if (sc->initial_aperture == 0) {
  106                 device_printf(dev, "bad initial aperture size, disabling\n");
  107                 return ENXIO;
  108         }
  109 
  110         for (;;) {
  111                 gatt = agp_alloc_gatt(dev);
  112                 if (gatt)
  113                         break;
  114 
  115                 /*
  116                  * Probably contigmalloc failure. Try reducing the
  117                  * aperture so that the gatt size reduces.
  118                  */
  119                 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
  120                         agp_generic_detach(dev);
  121                         return ENOMEM;
  122                 }
  123         }
  124         sc->gatt = gatt;
  125 
  126         /* Install the gatt. */
  127         pci_write_config(dev, AGP_ALI_ATTBASE,
  128                          (gatt->ag_physical
  129                           | (pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff)),
  130                          4);
  131         
  132         /* Enable the TLB. */
  133         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
  134 
  135         return 0;
  136 }
  137 
  138 static int
  139 agp_ali_detach(device_t dev)
  140 {
  141         struct agp_ali_softc *sc = device_get_softc(dev);
  142         int error;
  143 
  144         error = agp_generic_detach(dev);
  145         if (error)
  146                 return error;
  147 
  148         /* Disable the TLB.. */
  149         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
  150 
  151         /* Put the aperture back the way it started. */
  152         AGP_SET_APERTURE(dev, sc->initial_aperture);
  153         pci_write_config(dev, AGP_ALI_ATTBASE,
  154                          pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff,
  155                          4);
  156 
  157         agp_free_gatt(sc->gatt);
  158         return 0;
  159 }
  160 
  161 #define M 1024*1024
  162 
  163 static u_int32_t agp_ali_table[] = {
  164         0,                      /* 0 - invalid */
  165         1,                      /* 1 - invalid */
  166         2,                      /* 2 - invalid */
  167         4*M,                    /* 3 - invalid */
  168         8*M,                    /* 4 - invalid */
  169         0,                      /* 5 - invalid */
  170         16*M,                   /* 6 - invalid */
  171         32*M,                   /* 7 - invalid */
  172         64*M,                   /* 8 - invalid */
  173         128*M,                  /* 9 - invalid */
  174         256*M,                  /* 10 - invalid */
  175 };
  176 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0]))
  177 
  178 static u_int32_t
  179 agp_ali_get_aperture(device_t dev)
  180 {
  181         /*
  182          * The aperture size is derived from the low bits of attbase.
  183          * I'm not sure this is correct..
  184          */
  185         int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff;
  186         if (i >= agp_ali_table_size)
  187                 return 0;
  188         return agp_ali_table[i];
  189 }
  190 
  191 static int
  192 agp_ali_set_aperture(device_t dev, u_int32_t aperture)
  193 {
  194         int i;
  195 
  196         for (i = 0; i < agp_ali_table_size; i++)
  197                 if (agp_ali_table[i] == aperture)
  198                         break;
  199         if (i == agp_ali_table_size)
  200                 return EINVAL;
  201 
  202         pci_write_config(dev, AGP_ALI_ATTBASE,
  203                          ((pci_read_config(dev, AGP_ALI_ATTBASE, 4) & ~0xff)
  204                           | i), 4);
  205         return 0;
  206 }
  207 
  208 static int
  209 agp_ali_bind_page(device_t dev, int offset, vm_offset_t physical)
  210 {
  211         struct agp_ali_softc *sc = device_get_softc(dev);
  212 
  213         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
  214                 return EINVAL;
  215 
  216         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
  217         return 0;
  218 }
  219 
  220 static int
  221 agp_ali_unbind_page(device_t dev, int offset)
  222 {
  223         struct agp_ali_softc *sc = device_get_softc(dev);
  224 
  225         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
  226                 return EINVAL;
  227 
  228         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
  229         return 0;
  230 }
  231 
  232 static void
  233 agp_ali_flush_tlb(device_t dev)
  234 {
  235         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
  236         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
  237 }
  238 
  239 static device_method_t agp_ali_methods[] = {
  240         /* Device interface */
  241         DEVMETHOD(device_probe,         agp_ali_probe),
  242         DEVMETHOD(device_attach,        agp_ali_attach),
  243         DEVMETHOD(device_detach,        agp_ali_detach),
  244         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  245         DEVMETHOD(device_suspend,       bus_generic_suspend),
  246         DEVMETHOD(device_resume,        bus_generic_resume),
  247 
  248         /* AGP interface */
  249         DEVMETHOD(agp_get_aperture,     agp_ali_get_aperture),
  250         DEVMETHOD(agp_set_aperture,     agp_ali_set_aperture),
  251         DEVMETHOD(agp_bind_page,        agp_ali_bind_page),
  252         DEVMETHOD(agp_unbind_page,      agp_ali_unbind_page),
  253         DEVMETHOD(agp_flush_tlb,        agp_ali_flush_tlb),
  254         DEVMETHOD(agp_enable,           agp_generic_enable),
  255         DEVMETHOD(agp_alloc_memory,     agp_generic_alloc_memory),
  256         DEVMETHOD(agp_free_memory,      agp_generic_free_memory),
  257         DEVMETHOD(agp_bind_memory,      agp_generic_bind_memory),
  258         DEVMETHOD(agp_unbind_memory,    agp_generic_unbind_memory),
  259 
  260         { 0, 0 }
  261 };
  262 
  263 static driver_t agp_ali_driver = {
  264         "agp",
  265         agp_ali_methods,
  266         sizeof(struct agp_ali_softc),
  267 };
  268 
  269 static devclass_t agp_devclass;
  270 
  271 DRIVER_MODULE(agp_ali, pci, agp_ali_driver, agp_devclass, 0, 0);
  272 MODULE_DEPEND(agp_ali, agp, 1, 1, 1);
  273 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