The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

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

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*      $NetBSD: agp_ali.c,v 1.4 2003/01/31 00:07:39 thorpej Exp $      */
    2 
    3 /*-
    4  * Copyright (c) 2000 Doug Rabson
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  *
   28  *      $FreeBSD: src/sys/pci/agp_ali.c,v 1.3 2001/07/05 21:28:46 jhb Exp $
   29  */
   30 
   31 #include <sys/cdefs.h>
   32 __KERNEL_RCSID(0, "$NetBSD: agp_ali.c,v 1.4 2003/01/31 00:07:39 thorpej Exp $");
   33 
   34 #include <sys/param.h>
   35 #include <sys/kernel.h>
   36 #include <sys/malloc.h>
   37 #include <sys/systm.h>
   38 #include <sys/proc.h>
   39 #include <sys/conf.h>
   40 #include <sys/device.h>
   41 #include <sys/lock.h>
   42 #include <sys/agpio.h>
   43 
   44 #include <uvm/uvm_extern.h>
   45 
   46 #include <dev/pci/pcivar.h>
   47 #include <dev/pci/pcireg.h>
   48 #include <dev/pci/agpvar.h>
   49 #include <dev/pci/agpreg.h>
   50 
   51 #include <machine/bus.h>
   52 
   53 struct agp_ali_softc {
   54         struct agp_softc agp;
   55         u_int32_t       initial_aperture; /* aperture size at startup */
   56         struct agp_gatt *gatt;
   57 };
   58 
   59 static u_int32_t agp_ali_get_aperture(struct agp_softc *);
   60 static int agp_ali_set_aperture(struct agp_softc *sc, u_int32_t);
   61 static int agp_ali_bind_page(struct agp_softc *, off_t, bus_addr_t);
   62 static int agp_ali_unbind_page(struct agp_softc *, off_t);
   63 static void agp_ali_flush_tlb(struct agp_softc *);
   64 
   65 
   66 struct agp_methods agp_ali_methods = {
   67         agp_ali_get_aperture,
   68         agp_ali_set_aperture,
   69         agp_ali_bind_page,
   70         agp_ali_unbind_page,
   71         agp_ali_flush_tlb,
   72         agp_generic_enable,
   73         agp_generic_alloc_memory,
   74         agp_generic_free_memory,
   75         agp_generic_bind_memory,
   76         agp_generic_unbind_memory,
   77 };
   78 
   79 int
   80 agp_ali_attach(struct device *parent, struct device *self, void *aux)
   81 {
   82         struct agp_softc *sc = (struct agp_softc *)self;
   83         struct agp_ali_softc *asc;
   84         struct pci_attach_args *pa = aux;
   85         struct agp_gatt *gatt;
   86         pcireg_t reg;
   87 
   88         asc = malloc(sizeof *asc, M_AGP, M_NOWAIT);
   89         if (asc == NULL) {
   90                 aprint_error(": failed to allocate softc\n");
   91                 return ENOMEM;
   92         }
   93         sc->as_chipc = asc;
   94         sc->as_methods = &agp_ali_methods;
   95 
   96         if (agp_map_aperture(pa, sc) != 0) {
   97                 aprint_error(": failed to map aperture\n");
   98                 free(asc, M_AGP);
   99                 return ENXIO;
  100         }
  101 
  102         pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff,
  103             NULL);
  104 
  105         asc->initial_aperture = agp_ali_get_aperture(sc);
  106 
  107         for (;;) {
  108                 gatt = agp_alloc_gatt(sc);
  109                 if (gatt != NULL)
  110                         break;
  111 
  112                 /*
  113                  * Probably contigmalloc failure. Try reducing the
  114                  * aperture so that the gatt size reduces.
  115                  */
  116                 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) {
  117                         agp_generic_detach(sc);
  118                         aprint_error(": failed to set aperture\n");
  119                         return ENOMEM;
  120                 }
  121         }
  122         asc->gatt = gatt;
  123 
  124         /* Install the gatt. */
  125         reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_ALI_ATTBASE);
  126         reg = (reg & 0xff) | gatt->ag_physical;
  127         pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_ALI_ATTBASE, reg);
  128         
  129         /* Enable the TLB. */
  130         reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AGP_ALI_TLBCTRL);
  131         reg = (reg & ~0xff) | 0x10;
  132         pci_conf_write(pa->pa_pc, pa->pa_tag, AGP_ALI_TLBCTRL, reg);
  133 
  134         return 0;
  135 }
  136 
  137 #if 0
  138 static int
  139 agp_ali_detach(struct agp_softc *sc)
  140 {
  141         int error;
  142         pcireg_t reg;
  143         struct agp_ali_softc *asc = sc->as_chipc;
  144 
  145         error = agp_generic_detach(sc);
  146         if (error)
  147                 return error;
  148 
  149         /* Disable the TLB.. */
  150         reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL);
  151         reg &= ~0xff;
  152         reg |= 0x90;
  153         pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg);
  154 
  155         /* Put the aperture back the way it started. */
  156         AGP_SET_APERTURE(sc, asc->initial_aperture);
  157         reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE);
  158         reg &= 0xff;
  159         pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE, reg);
  160 
  161         agp_free_gatt(sc, asc->gatt);
  162         return 0;
  163 }
  164 #endif
  165 
  166 #define M 1024*1024
  167 
  168 static u_int32_t agp_ali_table[] = {
  169         0,                      /* 0 - invalid */
  170         1,                      /* 1 - invalid */
  171         2,                      /* 2 - invalid */
  172         4*M,                    /* 3 - invalid */
  173         8*M,                    /* 4 - invalid */
  174         0,                      /* 5 - invalid */
  175         16*M,                   /* 6 - invalid */
  176         32*M,                   /* 7 - invalid */
  177         64*M,                   /* 8 - invalid */
  178         128*M,                  /* 9 - invalid */
  179         256*M,                  /* 10 - invalid */
  180 };
  181 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0]))
  182 
  183 static u_int32_t
  184 agp_ali_get_aperture(struct agp_softc *sc)
  185 {
  186         int i;
  187 
  188         /*
  189          * The aperture size is derived from the low bits of attbase.
  190          * I'm not sure this is correct..
  191          */
  192         i = (int)pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE) & 0xff;
  193         if (i >= agp_ali_table_size)
  194                 return 0;
  195         return agp_ali_table[i];
  196 }
  197 
  198 static int
  199 agp_ali_set_aperture(struct agp_softc *sc, u_int32_t aperture)
  200 {
  201         int i;
  202         pcireg_t reg;
  203 
  204         for (i = 0; i < agp_ali_table_size; i++)
  205                 if (agp_ali_table[i] == aperture)
  206                         break;
  207         if (i == agp_ali_table_size)
  208                 return EINVAL;
  209 
  210         reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE);
  211         reg &= ~0xff;
  212         reg |= i;
  213         pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_ATTBASE, reg);
  214         return 0;
  215 }
  216 
  217 static int
  218 agp_ali_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical)
  219 {
  220         struct agp_ali_softc *asc = sc->as_chipc;
  221 
  222         if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT))
  223                 return EINVAL;
  224 
  225         asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
  226         return 0;
  227 }
  228 
  229 static int
  230 agp_ali_unbind_page(struct agp_softc *sc, off_t offset)
  231 {
  232         struct agp_ali_softc *asc = sc->as_chipc;
  233 
  234         if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT))
  235                 return EINVAL;
  236 
  237         asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
  238         return 0;
  239 }
  240 
  241 static void
  242 agp_ali_flush_tlb(struct agp_softc *sc)
  243 {
  244         pcireg_t reg;
  245 
  246         reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL);
  247         reg &= ~0xff;
  248         reg |= 0x90;
  249         pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg);
  250         reg &= ~0xff;
  251         reg |= 0x10;
  252         pci_conf_write(sc->as_pc, sc->as_tag, AGP_ALI_TLBCTRL, reg);
  253 }

Cache object: 79a1c4571a3133da8b397bd4171b8838


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.