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_apple.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2010 Nathan Whitehorn
    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 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD$");
   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 <machine/resource.h>
   43 
   44 #include <dev/agp/agppriv.h>
   45 #include <dev/agp/agpreg.h>
   46 #include <dev/pci/pcivar.h>
   47 #include <dev/pci/pcireg.h>
   48 
   49 #include <vm/vm.h>
   50 #include <vm/vm_object.h>
   51 #include <vm/pmap.h>
   52 
   53 #define UNIN_AGP_GART_BASE      0x8c
   54 #define UNIN_AGP_BASE_ADDR      0x90
   55 #define UNIN_AGP_GART_CONTROL   0x94
   56 
   57 #define UNIN_AGP_GART_INVAL     0x00000001
   58 #define UNIN_AGP_GART_ENABLE    0x00000100
   59 #define UNIN_AGP_GART_2XRESET   0x00010000
   60 #define UNIN_AGP_U3_GART_PERFRD 0x00080000
   61 
   62 struct agp_apple_softc {
   63         struct agp_softc agp;
   64         uint32_t        aperture;
   65         struct agp_gatt *gatt;
   66         int             u3;
   67         int             needs_2x_reset;
   68 };
   69 
   70 static int
   71 agp_apple_probe(device_t dev)
   72 {
   73 
   74         if (resource_disabled("agp", device_get_unit(dev)))
   75                 return (ENXIO);
   76 
   77         if (pci_get_class(dev) != PCIC_BRIDGE
   78             || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
   79                 return (ENXIO);
   80 
   81         if (agp_find_caps(dev) == 0)
   82                 return (ENXIO);
   83 
   84         if (pci_get_class(dev) != PCIC_BRIDGE
   85             || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
   86                 return (ENXIO);
   87 
   88         switch (pci_get_devid(dev)) {
   89         case 0x0020106b:
   90         case 0x0027106b:
   91                 device_set_desc(dev, "Apple UniNorth AGP Bridge");
   92                 return (BUS_PROBE_DEFAULT);
   93         case 0x002d106b:
   94                 device_set_desc(dev, "Apple UniNorth 1.5 AGP Bridge");
   95                 return (BUS_PROBE_DEFAULT);
   96         case 0x0034106b:
   97                 device_set_desc(dev, "Apple UniNorth 2 AGP Bridge");
   98                 return (BUS_PROBE_DEFAULT);
   99         case 0x004b106b:
  100         case 0x0058106b:
  101         case 0x0059106b:
  102                 device_set_desc(dev, "Apple U3 AGP Bridge");
  103                 return (BUS_PROBE_DEFAULT);
  104         case 0x0066106b:
  105                 device_set_desc(dev, "Apple Intrepid AGP Bridge");
  106                 return (BUS_PROBE_DEFAULT);
  107         }
  108 
  109         return (ENXIO);
  110 }
  111 
  112 static int
  113 agp_apple_attach(device_t dev)
  114 {
  115         struct agp_apple_softc *sc = device_get_softc(dev);
  116         int error;
  117 
  118         /* Record quirks */
  119         sc->needs_2x_reset = 0;
  120         sc->u3 = 0;
  121         switch (pci_get_devid(dev)) {
  122         case 0x0020106b:
  123         case 0x0027106b:
  124                 sc->needs_2x_reset = 1;
  125                 break;
  126         case 0x004b106b:
  127         case 0x0058106b:
  128         case 0x0059106b:
  129                 sc->u3 = 1;
  130                 break;
  131         }
  132 
  133         /* Set the aperture bus address base (must be 0) */
  134         pci_write_config(dev, UNIN_AGP_BASE_ADDR, 0, 4);
  135         agp_set_aperture_resource(dev, -1);
  136 
  137         error = agp_generic_attach(dev);
  138         if (error)
  139                 return (error);
  140 
  141         sc->aperture = 256*1024*1024;
  142 
  143         for (sc->aperture = 256*1024*1024; sc->aperture >= 4*1024*1024;
  144             sc->aperture /= 2) {
  145                 sc->gatt = agp_alloc_gatt(dev);
  146                 if (sc->gatt)
  147                         break;
  148         }
  149         if (sc->aperture < 4*1024*1024) {
  150                 agp_generic_detach(dev);
  151                 return ENOMEM;
  152         }
  153 
  154         /* Install the gatt. */
  155         AGP_SET_APERTURE(dev, sc->aperture);
  156 
  157         /* XXX: U3 scratch page? */
  158         
  159         /* Enable the aperture and TLB. */
  160         AGP_FLUSH_TLB(dev);
  161 
  162         return (0);
  163 }
  164 
  165 static int
  166 agp_apple_detach(device_t dev)
  167 {
  168         struct agp_apple_softc *sc = device_get_softc(dev);
  169 
  170         agp_free_cdev(dev);
  171 
  172         /* Disable the aperture and TLB */
  173         pci_write_config(dev, UNIN_AGP_GART_CONTROL, UNIN_AGP_GART_INVAL, 4);
  174         pci_write_config(dev, UNIN_AGP_GART_CONTROL, 0, 4);
  175 
  176         if (sc->needs_2x_reset) {
  177                 pci_write_config(dev, UNIN_AGP_GART_CONTROL,
  178                     UNIN_AGP_GART_2XRESET, 4);
  179                 pci_write_config(dev, UNIN_AGP_GART_CONTROL, 0, 4);
  180         }
  181 
  182         AGP_SET_APERTURE(dev, 0);
  183 
  184         agp_free_gatt(sc->gatt);
  185         agp_free_res(dev);
  186         return 0;
  187 }
  188 
  189 static uint32_t
  190 agp_apple_get_aperture(device_t dev)
  191 {
  192         struct agp_apple_softc *sc = device_get_softc(dev);
  193 
  194         return (sc->aperture);
  195 }
  196 
  197 static int
  198 agp_apple_set_aperture(device_t dev, uint32_t aperture)
  199 {
  200         struct agp_apple_softc *sc = device_get_softc(dev);
  201 
  202         /*
  203          * Check for a multiple of 4 MB and make sure it is within the
  204          * programmable range.
  205          */
  206         if (aperture % (4*1024*1024)
  207             || aperture < 4*1024*1024
  208             || aperture > ((sc->u3) ? 512 : 256)*1024*1024)
  209                 return EINVAL;
  210 
  211         /* The aperture value is a multiple of 4 MB */
  212         aperture /= (4*1024*1024);
  213 
  214         pci_write_config(dev, UNIN_AGP_GART_BASE,
  215             (sc->gatt->ag_physical & 0xfffff000) | aperture, 4);
  216         
  217         return (0);
  218 }
  219 
  220 static int
  221 agp_apple_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
  222 {
  223         struct agp_apple_softc *sc = device_get_softc(dev);
  224 
  225         if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
  226                 return EINVAL;
  227 
  228         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
  229         return (0);
  230 }
  231 
  232 static int
  233 agp_apple_unbind_page(device_t dev, vm_offset_t offset)
  234 {
  235         struct agp_apple_softc *sc = device_get_softc(dev);
  236 
  237         if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
  238                 return EINVAL;
  239 
  240         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
  241         return (0);
  242 }
  243 
  244 static void
  245 agp_apple_flush_tlb(device_t dev)
  246 {
  247         struct agp_apple_softc *sc = device_get_softc(dev);
  248         uint32_t cntrl = UNIN_AGP_GART_ENABLE;
  249 
  250         if (sc->u3)
  251                 cntrl |= UNIN_AGP_U3_GART_PERFRD;
  252 
  253         pci_write_config(dev, UNIN_AGP_GART_CONTROL,
  254             cntrl | UNIN_AGP_GART_INVAL, 4);
  255         pci_write_config(dev, UNIN_AGP_GART_CONTROL, cntrl, 4);
  256 
  257         if (sc->needs_2x_reset) {
  258                 pci_write_config(dev, UNIN_AGP_GART_CONTROL,
  259                     cntrl | UNIN_AGP_GART_2XRESET, 4);
  260                 pci_write_config(dev, UNIN_AGP_GART_CONTROL, cntrl, 4);
  261         }
  262 }
  263 
  264 static device_method_t agp_apple_methods[] = {
  265         /* Device interface */
  266         DEVMETHOD(device_probe,         agp_apple_probe),
  267         DEVMETHOD(device_attach,        agp_apple_attach),
  268         DEVMETHOD(device_detach,        agp_apple_detach),
  269         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  270         DEVMETHOD(device_suspend,       bus_generic_suspend),
  271         DEVMETHOD(device_resume,        bus_generic_resume),
  272 
  273         /* AGP interface */
  274         DEVMETHOD(agp_get_aperture,     agp_apple_get_aperture),
  275         DEVMETHOD(agp_set_aperture,     agp_apple_set_aperture),
  276         DEVMETHOD(agp_bind_page,        agp_apple_bind_page),
  277         DEVMETHOD(agp_unbind_page,      agp_apple_unbind_page),
  278         DEVMETHOD(agp_flush_tlb,        agp_apple_flush_tlb),
  279         DEVMETHOD(agp_enable,           agp_generic_enable),
  280         DEVMETHOD(agp_alloc_memory,     agp_generic_alloc_memory),
  281         DEVMETHOD(agp_free_memory,      agp_generic_free_memory),
  282         DEVMETHOD(agp_bind_memory,      agp_generic_bind_memory),
  283         DEVMETHOD(agp_unbind_memory,    agp_generic_unbind_memory),
  284 
  285         { 0, 0 }
  286 };
  287 
  288 static driver_t agp_apple_driver = {
  289         "agp",
  290         agp_apple_methods,
  291         sizeof(struct agp_apple_softc),
  292 };
  293 
  294 static devclass_t agp_devclass;
  295 
  296 DRIVER_MODULE(agp_apple, hostb, agp_apple_driver, agp_devclass, 0, 0);
  297 MODULE_DEPEND(agp_apple, agp, 1, 1, 1);
  298 MODULE_DEPEND(agp_apple, pci, 1, 1, 1);

Cache object: 2425e8b33b8a061bc0e1868854d7c79a


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