sys/dev/agp/agp_ali.c

   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  *      $FreeBSD: src/sys/pci/agp_ali.c,v 1.1.2.1 2000/07/19 09:48:04 ru Exp $
  27  *      $DragonFly: src/sys/dev/agp/agp_ali.c,v 1.5 2004/10/10 20:59:02 dillon Exp $
  28  */
  29
  30 #include "opt_bus.h"
  31 #include "opt_pci.h"
  32
  33 #include <sys/param.h>
  34 #include <sys/systm.h>
  35 #include <sys/malloc.h>
  36 #include <sys/kernel.h>
  37 #include <sys/bus.h>
  38 #include <sys/lock.h>
  39
  40 #include <bus/pci/pcivar.h>
  41 #include <bus/pci/pcireg.h>
  42 #include "agppriv.h"
  43 #include "agpreg.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 0x154110b9:
  67                 return ("Ali M1541 host to AGP bridge");
  68         };
  69
  70         if (pci_get_vendor(dev) == 0x10b9)
  71                 return ("Ali Generic host to PCI bridge");
  72
  73         return NULL;
  74 }
  75
  76 static int
  77 agp_ali_probe(device_t dev)
  78 {
  79         const char *desc;
  80
  81         desc = agp_ali_match(dev);
  82         if (desc) {
  83                 device_verbose(dev);
  84                 device_set_desc(dev, desc);
  85                 return 0;
  86         }
  87
  88         return ENXIO;
  89 }
  90
  91 static int
  92 agp_ali_attach(device_t dev)
  93 {
  94         struct agp_ali_softc *sc = device_get_softc(dev);
  95         struct agp_gatt *gatt;
  96         int error;
  97
  98         error = agp_generic_attach(dev);
  99         if (error)
 100                 return error;
 101
 102         sc->initial_aperture = AGP_GET_APERTURE(dev);
 103         if (sc->initial_aperture == 0) {
 104                 device_printf(dev, "bad initial aperture size, disabling\n");
 105                 agp_generic_detach(dev);
 106                 return ENXIO;
 107         }
 108
 109         for (;;) {
 110                 gatt = agp_alloc_gatt(dev);
 111                 if (gatt)
 112                         break;
 113
 114                 /*
 115                  * Probably contigmalloc failure. Try reducing the
 116                  * aperture so that the gatt size reduces.
 117                  */
 118                 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
 119                         agp_generic_detach(dev);
 120                         return ENOMEM;
 121                 }
 122         }
 123         sc->gatt = gatt;
 124
 125         /* Install the gatt. */
 126         pci_write_config(dev, AGP_ALI_ATTBASE,
 127                          (gatt->ag_physical
 128                           | (pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff)),
 129                          4);
 130
 131         /* Enable the TLB. */
 132         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
 133
 134         return 0;
 135 }
 136
 137 static int
 138 agp_ali_detach(device_t dev)
 139 {
 140         struct agp_ali_softc *sc = device_get_softc(dev);
 141         int error;
 142
 143         error = agp_generic_detach(dev);
 144         if (error)
 145                 return error;
 146
 147         /* Disable the TLB.. */
 148         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
 149
 150         /* Put the aperture back the way it started. */
 151         AGP_SET_APERTURE(dev, sc->initial_aperture);
 152         pci_write_config(dev, AGP_ALI_ATTBASE,
 153                          pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff,
 154                          4);
 155
 156         agp_free_gatt(sc->gatt);
 157         return 0;
 158 }
 159
 160 #define M 1024*1024
 161
 162 static u_int32_t agp_ali_table[] = {
 163         0,                      /* 0 - invalid */
 164         1,                      /* 1 - invalid */
 165         2,                      /* 2 - invalid */
 166         4*M,                    /* 3 - invalid */
 167         8*M,                    /* 4 - invalid */
 168         0,                      /* 5 - invalid */
 169         16*M,                   /* 6 - invalid */
 170         32*M,                   /* 7 - invalid */
 171         64*M,                   /* 8 - invalid */
 172         128*M,                  /* 9 - invalid */
 173         256*M,                  /* 10 - invalid */
 174 };
 175 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0]))
 176
 177 static u_int32_t
 178 agp_ali_get_aperture(device_t dev)
 179 {
 180         /*
 181          * The aperture size is derived from the low bits of attbase.
 182          * I'm not sure this is correct..
 183          */
 184         int i = pci_read_config(dev, AGP_ALI_ATTBASE, 4) & 0xff;
 185         if (i >= agp_ali_table_size)
 186                 return 0;
 187         return agp_ali_table[i];
 188 }
 189
 190 static int
 191 agp_ali_set_aperture(device_t dev, u_int32_t aperture)
 192 {
 193         int i;
 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         pci_write_config(dev, AGP_ALI_ATTBASE,
 202                          ((pci_read_config(dev, AGP_ALI_ATTBASE, 4) & ~0xff)
 203                           | i), 4);
 204         return 0;
 205 }
 206
 207 static int
 208 agp_ali_bind_page(device_t dev, int offset, vm_offset_t physical)
 209 {
 210         struct agp_ali_softc *sc = device_get_softc(dev);
 211
 212         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
 213                 return EINVAL;
 214
 215         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
 216         return 0;
 217 }
 218
 219 static int
 220 agp_ali_unbind_page(device_t dev, int offset)
 221 {
 222         struct agp_ali_softc *sc = device_get_softc(dev);
 223
 224         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
 225                 return EINVAL;
 226
 227         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
 228         return 0;
 229 }
 230
 231 static void
 232 agp_ali_flush_tlb(device_t dev)
 233 {
 234         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x90, 1);
 235         pci_write_config(dev, AGP_ALI_TLBCTRL, 0x10, 1);
 236 }
 237
 238 static device_method_t agp_ali_methods[] = {
 239         /* Device interface */
 240         DEVMETHOD(device_probe,         agp_ali_probe),
 241         DEVMETHOD(device_attach,        agp_ali_attach),
 242         DEVMETHOD(device_detach,        agp_ali_detach),
 243         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
 244         DEVMETHOD(device_suspend,       bus_generic_suspend),
 245         DEVMETHOD(device_resume,        bus_generic_resume),
 246
 247         /* AGP interface */
 248         DEVMETHOD(agp_get_aperture,     agp_ali_get_aperture),
 249         DEVMETHOD(agp_set_aperture,     agp_ali_set_aperture),
 250         DEVMETHOD(agp_bind_page,        agp_ali_bind_page),
 251         DEVMETHOD(agp_unbind_page,      agp_ali_unbind_page),
 252         DEVMETHOD(agp_flush_tlb,        agp_ali_flush_tlb),
 253         DEVMETHOD(agp_enable,           agp_generic_enable),
 254         DEVMETHOD(agp_alloc_memory,     agp_generic_alloc_memory),
 255         DEVMETHOD(agp_free_memory,      agp_generic_free_memory),
 256         DEVMETHOD(agp_bind_memory,      agp_generic_bind_memory),
 257         DEVMETHOD(agp_unbind_memory,    agp_generic_unbind_memory),
 258
 259         { 0, 0 }
 260 };
 261
 262 static driver_t agp_ali_driver = {
 263         "agp",
 264         agp_ali_methods,
 265         sizeof(struct agp_ali_softc),
 266 };
 267
 268 static devclass_t agp_devclass;
 269
 270 DRIVER_MODULE(agp_ali, pci, agp_ali_driver, agp_devclass, 0, 0);
 271 MODULE_DEPEND(agp_ali, agp, 1, 1, 1);
 272 MODULE_DEPEND(agp_ali, pci, 1, 1, 1);