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/dev/agp/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/11.1/sys/dev/agp/agp_ali.c 298306 2016-04-19 23:31:35Z pfg $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/malloc.h>
   33 #include <sys/kernel.h>
   34 #include <sys/module.h>
   35 #include <sys/bus.h>
   36 #include <sys/lock.h>
   37 #include <sys/mutex.h>
   38 #include <sys/proc.h>
   39 
   40 #include <dev/agp/agppriv.h>
   41 #include <dev/agp/agpreg.h>
   42 #include <dev/pci/pcivar.h>
   43 #include <dev/pci/pcireg.h>
   44 
   45 #include <vm/vm.h>
   46 #include <vm/vm_object.h>
   47 #include <vm/pmap.h>
   48 
   49 struct agp_ali_softc {
   50         struct agp_softc agp;
   51         u_int32_t       initial_aperture; /* aperture size at startup */
   52         struct agp_gatt *gatt;
   53 };
   54 
   55 static const char*
   56 agp_ali_match(device_t dev)
   57 {
   58         if (pci_get_class(dev) != PCIC_BRIDGE
   59             || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
   60                 return NULL;
   61 
   62         if (agp_find_caps(dev) == 0)
   63                 return NULL;
   64 
   65         switch (pci_get_devid(dev)) {
   66         case 0x167110b9:
   67                 return ("Ali M1671 host to AGP bridge");
   68         case 0x154110b9:
   69                 return ("Ali M1541 host to AGP bridge");
   70         case 0x162110b9:
   71                 return ("Ali M1621 host to AGP bridge");
   72         }
   73 
   74         return NULL;
   75 }
   76 
   77 static int
   78 agp_ali_probe(device_t dev)
   79 {
   80         const char *desc;
   81 
   82         if (resource_disabled("agp", device_get_unit(dev)))
   83                 return (ENXIO);
   84         desc = agp_ali_match(dev);
   85         if (desc) {
   86                 device_set_desc(dev, desc);
   87                 return BUS_PROBE_DEFAULT;
   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         u_int32_t attbase;
  100 
  101         error = agp_generic_attach(dev);
  102         if (error)
  103                 return error;
  104 
  105         sc->initial_aperture = AGP_GET_APERTURE(dev);
  106         if (sc->initial_aperture == 0) {
  107                 device_printf(dev, "bad initial aperture size, disabling\n");
  108                 return ENXIO;
  109         }
  110 
  111         for (;;) {
  112                 gatt = agp_alloc_gatt(dev);
  113                 if (gatt)
  114                         break;
  115 
  116                 /*
  117                  * Probably contigmalloc failure. Try reducing the
  118                  * aperture so that the gatt size reduces.
  119                  */
  120                 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
  121                         agp_generic_detach(dev);
  122                         return ENOMEM;
  123                 }
  124         }
  125         sc->gatt = gatt;
  126 
  127         /* Install the gatt. */
  128         attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
  129         pci_write_config(dev, AGP_ALI_ATTBASE, gatt->ag_physical |
  130             (attbase & 0xfff), 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         u_int32_t attbase;
  143 
  144         agp_free_cdev(dev);
  145 
  146         /* Disable the TLB.. */
  147         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
  148 
  149         /* Put the aperture back the way it started. */
  150         AGP_SET_APERTURE(dev, sc->initial_aperture);
  151         attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
  152         pci_write_config(dev, AGP_ALI_ATTBASE, attbase & 0xfff, 4);
  153 
  154         agp_free_gatt(sc->gatt);
  155         agp_free_res(dev);
  156         return 0;
  157 }
  158 
  159 #define M 1024*1024
  160 
  161 static u_int32_t agp_ali_table[] = {
  162         0,                      /* 0 - invalid */
  163         1,                      /* 1 - invalid */
  164         2,                      /* 2 - invalid */
  165         4*M,                    /* 3 - invalid */
  166         8*M,                    /* 4 - invalid */
  167         0,                      /* 5 - invalid */
  168         16*M,                   /* 6 - invalid */
  169         32*M,                   /* 7 - invalid */
  170         64*M,                   /* 8 - invalid */
  171         128*M,                  /* 9 - invalid */
  172         256*M,                  /* 10 - invalid */
  173 };
  174 #define AGP_ALI_TABLE_SIZE nitems(agp_ali_table)
  175 
  176 static u_int32_t
  177 agp_ali_get_aperture(device_t dev)
  178 {
  179         /*
  180          * The aperture size is derived from the low bits of attbase.
  181          * I'm not sure this is correct..
  182          */
  183         int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xf;
  184         if (i >= AGP_ALI_TABLE_SIZE)
  185                 return 0;
  186         return agp_ali_table[i];
  187 }
  188 
  189 static int
  190 agp_ali_set_aperture(device_t dev, u_int32_t aperture)
  191 {
  192         int i;
  193         u_int32_t attbase;
  194 
  195         for (i = 0; i < AGP_ALI_TABLE_SIZE; i++)
  196                 if (agp_ali_table[i] == aperture)
  197                         break;
  198         if (i == AGP_ALI_TABLE_SIZE)
  199                 return EINVAL;
  200 
  201         attbase = pci_read_config(dev, AGP_ALI_ATTBASE, 4);
  202         pci_write_config(dev, AGP_ALI_ATTBASE, (attbase & ~0xf) | i, 4);
  203         return 0;
  204 }
  205 
  206 static int
  207 agp_ali_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
  208 {
  209         struct agp_ali_softc *sc = device_get_softc(dev);
  210 
  211         if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
  212                 return EINVAL;
  213 
  214         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
  215         return 0;
  216 }
  217 
  218 static int
  219 agp_ali_unbind_page(device_t dev, vm_offset_t offset)
  220 {
  221         struct agp_ali_softc *sc = device_get_softc(dev);
  222 
  223         if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
  224                 return EINVAL;
  225 
  226         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
  227         return 0;
  228 }
  229 
  230 static void
  231 agp_ali_flush_tlb(device_t dev)
  232 {
  233         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
  234         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
  235 }
  236 
  237 static device_method_t agp_ali_methods[] = {
  238         /* Device interface */
  239         DEVMETHOD(device_probe,         agp_ali_probe),
  240         DEVMETHOD(device_attach,        agp_ali_attach),
  241         DEVMETHOD(device_detach,        agp_ali_detach),
  242         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  243         DEVMETHOD(device_suspend,       bus_generic_suspend),
  244         DEVMETHOD(device_resume,        bus_generic_resume),
  245 
  246         /* AGP interface */
  247         DEVMETHOD(agp_get_aperture,     agp_ali_get_aperture),
  248         DEVMETHOD(agp_set_aperture,     agp_ali_set_aperture),
  249         DEVMETHOD(agp_bind_page,        agp_ali_bind_page),
  250         DEVMETHOD(agp_unbind_page,      agp_ali_unbind_page),
  251         DEVMETHOD(agp_flush_tlb,        agp_ali_flush_tlb),
  252         DEVMETHOD(agp_enable,           agp_generic_enable),
  253         DEVMETHOD(agp_alloc_memory,     agp_generic_alloc_memory),
  254         DEVMETHOD(agp_free_memory,      agp_generic_free_memory),
  255         DEVMETHOD(agp_bind_memory,      agp_generic_bind_memory),
  256         DEVMETHOD(agp_unbind_memory,    agp_generic_unbind_memory),
  257 
  258         { 0, 0 }
  259 };
  260 
  261 static driver_t agp_ali_driver = {
  262         "agp",
  263         agp_ali_methods,
  264         sizeof(struct agp_ali_softc),
  265 };
  266 
  267 static devclass_t agp_devclass;
  268 
  269 DRIVER_MODULE(agp_ali, hostb, agp_ali_driver, agp_devclass, 0, 0);
  270 MODULE_DEPEND(agp_ali, agp, 1, 1, 1);
  271 MODULE_DEPEND(agp_ali, pci, 1, 1, 1);

Cache object: 3c4d1e91da9ac7ae9aeddbb7bc585fd7


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