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/5.3/sys/pci/agp_ali.c 129878 2004-05-30 20:00:41Z phk $");
   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 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         if (resource_disabled("agp", device_get_unit(dev)))
   84                 return (ENXIO);
   85         desc = agp_ali_match(dev);
   86         if (desc) {
   87                 device_verbose(dev);
   88                 device_set_desc(dev, desc);
   89                 return 0;
   90         }
   91 
   92         return ENXIO;
   93 }
   94 
   95 static int
   96 agp_ali_attach(device_t dev)
   97 {
   98         struct agp_ali_softc *sc = device_get_softc(dev);
   99         struct agp_gatt *gatt;
  100         int error;
  101 
  102         error = agp_generic_attach(dev);
  103         if (error)
  104                 return error;
  105 
  106         sc->initial_aperture = AGP_GET_APERTURE(dev);
  107         if (sc->initial_aperture == 0) {
  108                 device_printf(dev, "bad initial aperture size, disabling\n");
  109                 return ENXIO;
  110         }
  111 
  112         for (;;) {
  113                 gatt = agp_alloc_gatt(dev);
  114                 if (gatt)
  115                         break;
  116 
  117                 /*
  118                  * Probably contigmalloc failure. Try reducing the
  119                  * aperture so that the gatt size reduces.
  120                  */
  121                 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
  122                         agp_generic_detach(dev);
  123                         return ENOMEM;
  124                 }
  125         }
  126         sc->gatt = gatt;
  127 
  128         /* Install the gatt. */
  129         pci_write_config(dev, AGP_ALI_ATTBASE,
  130                          (gatt->ag_physical
  131                           | (pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff)),
  132                          4);
  133         
  134         /* Enable the TLB. */
  135         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
  136 
  137         return 0;
  138 }
  139 
  140 static int
  141 agp_ali_detach(device_t dev)
  142 {
  143         struct agp_ali_softc *sc = device_get_softc(dev);
  144         int error;
  145 
  146         error = agp_generic_detach(dev);
  147         if (error)
  148                 return error;
  149 
  150         /* Disable the TLB.. */
  151         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
  152 
  153         /* Put the aperture back the way it started. */
  154         AGP_SET_APERTURE(dev, sc->initial_aperture);
  155         pci_write_config(dev, AGP_ALI_ATTBASE,
  156                          pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff,
  157                          4);
  158 
  159         agp_free_gatt(sc->gatt);
  160         return 0;
  161 }
  162 
  163 #define M 1024*1024
  164 
  165 static u_int32_t agp_ali_table[] = {
  166         0,                      /* 0 - invalid */
  167         1,                      /* 1 - invalid */
  168         2,                      /* 2 - invalid */
  169         4*M,                    /* 3 - invalid */
  170         8*M,                    /* 4 - invalid */
  171         0,                      /* 5 - invalid */
  172         16*M,                   /* 6 - invalid */
  173         32*M,                   /* 7 - invalid */
  174         64*M,                   /* 8 - invalid */
  175         128*M,                  /* 9 - invalid */
  176         256*M,                  /* 10 - invalid */
  177 };
  178 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0]))
  179 
  180 static u_int32_t
  181 agp_ali_get_aperture(device_t dev)
  182 {
  183         /*
  184          * The aperture size is derived from the low bits of attbase.
  185          * I'm not sure this is correct..
  186          */
  187         int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff;
  188         if (i >= agp_ali_table_size)
  189                 return 0;
  190         return agp_ali_table[i];
  191 }
  192 
  193 static int
  194 agp_ali_set_aperture(device_t dev, u_int32_t aperture)
  195 {
  196         int i;
  197 
  198         for (i = 0; i < agp_ali_table_size; i++)
  199                 if (agp_ali_table[i] == aperture)
  200                         break;
  201         if (i == agp_ali_table_size)
  202                 return EINVAL;
  203 
  204         pci_write_config(dev, AGP_ALI_ATTBASE,
  205                          ((pci_read_config(dev, AGP_ALI_ATTBASE, 4) & ~0xff)
  206                           | i), 4);
  207         return 0;
  208 }
  209 
  210 static int
  211 agp_ali_bind_page(device_t dev, int offset, vm_offset_t physical)
  212 {
  213         struct agp_ali_softc *sc = device_get_softc(dev);
  214 
  215         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
  216                 return EINVAL;
  217 
  218         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
  219         return 0;
  220 }
  221 
  222 static int
  223 agp_ali_unbind_page(device_t dev, int offset)
  224 {
  225         struct agp_ali_softc *sc = device_get_softc(dev);
  226 
  227         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
  228                 return EINVAL;
  229 
  230         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
  231         return 0;
  232 }
  233 
  234 static void
  235 agp_ali_flush_tlb(device_t dev)
  236 {
  237         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
  238         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
  239 }
  240 
  241 static device_method_t agp_ali_methods[] = {
  242         /* Device interface */
  243         DEVMETHOD(device_probe,         agp_ali_probe),
  244         DEVMETHOD(device_attach,        agp_ali_attach),
  245         DEVMETHOD(device_detach,        agp_ali_detach),
  246         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  247         DEVMETHOD(device_suspend,       bus_generic_suspend),
  248         DEVMETHOD(device_resume,        bus_generic_resume),
  249 
  250         /* AGP interface */
  251         DEVMETHOD(agp_get_aperture,     agp_ali_get_aperture),
  252         DEVMETHOD(agp_set_aperture,     agp_ali_set_aperture),
  253         DEVMETHOD(agp_bind_page,        agp_ali_bind_page),
  254         DEVMETHOD(agp_unbind_page,      agp_ali_unbind_page),
  255         DEVMETHOD(agp_flush_tlb,        agp_ali_flush_tlb),
  256         DEVMETHOD(agp_enable,           agp_generic_enable),
  257         DEVMETHOD(agp_alloc_memory,     agp_generic_alloc_memory),
  258         DEVMETHOD(agp_free_memory,      agp_generic_free_memory),
  259         DEVMETHOD(agp_bind_memory,      agp_generic_bind_memory),
  260         DEVMETHOD(agp_unbind_memory,    agp_generic_unbind_memory),
  261 
  262         { 0, 0 }
  263 };
  264 
  265 static driver_t agp_ali_driver = {
  266         "agp",
  267         agp_ali_methods,
  268         sizeof(struct agp_ali_softc),
  269 };
  270 
  271 static devclass_t agp_devclass;
  272 
  273 DRIVER_MODULE(agp_ali, pci, agp_ali_driver, agp_devclass, 0, 0);
  274 MODULE_DEPEND(agp_ali, agp, 1, 1, 1);
  275 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