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  * Copyright (c) 2010 Nathan Whitehorn
    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: stable/10/sys/dev/agp/agp_apple.c 275406 2014-12-02 13:46:13Z tijl $");
   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 <machine/resource.h>
   41 
   42 #include <dev/agp/agppriv.h>
   43 #include <dev/agp/agpreg.h>
   44 #include <dev/pci/pcivar.h>
   45 #include <dev/pci/pcireg.h>
   46 
   47 #include <vm/vm.h>
   48 #include <vm/vm_object.h>
   49 #include <vm/pmap.h>
   50 
   51 #define UNIN_AGP_GART_BASE      0x8c
   52 #define UNIN_AGP_BASE_ADDR      0x90
   53 #define UNIN_AGP_GART_CONTROL   0x94
   54 
   55 #define UNIN_AGP_GART_INVAL     0x00000001
   56 #define UNIN_AGP_GART_ENABLE    0x00000100
   57 #define UNIN_AGP_GART_2XRESET   0x00010000
   58 #define UNIN_AGP_U3_GART_PERFRD 0x00080000
   59 
   60 struct agp_apple_softc {
   61         struct agp_softc agp;
   62         uint32_t        aperture;
   63         struct agp_gatt *gatt;
   64         int             u3;
   65         int             needs_2x_reset;
   66 };
   67 
   68 static int
   69 agp_apple_probe(device_t dev)
   70 {
   71 
   72         if (resource_disabled("agp", device_get_unit(dev)))
   73                 return (ENXIO);
   74 
   75         if (pci_get_class(dev) != PCIC_BRIDGE
   76             || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
   77                 return (ENXIO);
   78 
   79         if (agp_find_caps(dev) == 0)
   80                 return (ENXIO);
   81 
   82         if (pci_get_class(dev) != PCIC_BRIDGE
   83             || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
   84                 return (ENXIO);
   85 
   86         switch (pci_get_devid(dev)) {
   87         case 0x0020106b:
   88         case 0x0027106b:
   89                 device_set_desc(dev, "Apple UniNorth AGP Bridge");
   90                 return (BUS_PROBE_DEFAULT);
   91         case 0x002d106b:
   92                 device_set_desc(dev, "Apple UniNorth 1.5 AGP Bridge");
   93                 return (BUS_PROBE_DEFAULT);
   94         case 0x0034106b:
   95                 device_set_desc(dev, "Apple UniNorth 2 AGP Bridge");
   96                 return (BUS_PROBE_DEFAULT);
   97         case 0x004b106b:
   98         case 0x0058106b:
   99         case 0x0059106b:
  100                 device_set_desc(dev, "Apple U3 AGP Bridge");
  101                 return (BUS_PROBE_DEFAULT);
  102         case 0x0066106b:
  103                 device_set_desc(dev, "Apple Intrepid AGP Bridge");
  104                 return (BUS_PROBE_DEFAULT);
  105         }
  106 
  107         return (ENXIO);
  108 }
  109 
  110 static int
  111 agp_apple_attach(device_t dev)
  112 {
  113         struct agp_apple_softc *sc = device_get_softc(dev);
  114         int error;
  115 
  116         /* Record quirks */
  117         sc->needs_2x_reset = 0;
  118         sc->u3 = 0;
  119         switch (pci_get_devid(dev)) {
  120         case 0x0020106b:
  121         case 0x0027106b:
  122                 sc->needs_2x_reset = 1;
  123                 break;
  124         case 0x004b106b:
  125         case 0x0058106b:
  126         case 0x0059106b:
  127                 sc->u3 = 1;
  128                 break;
  129         }
  130 
  131         /* Set the aperture bus address base (must be 0) */
  132         pci_write_config(dev, UNIN_AGP_BASE_ADDR, 0, 4);
  133         agp_set_aperture_resource(dev, -1);
  134 
  135         error = agp_generic_attach(dev);
  136         if (error)
  137                 return (error);
  138 
  139         sc->aperture = 256*1024*1024;
  140 
  141         for (sc->aperture = 256*1024*1024; sc->aperture >= 4*1024*1024;
  142             sc->aperture /= 2) {
  143                 sc->gatt = agp_alloc_gatt(dev);
  144                 if (sc->gatt)
  145                         break;
  146         }
  147         if (sc->aperture < 4*1024*1024) {
  148                 agp_generic_detach(dev);
  149                 return ENOMEM;
  150         }
  151 
  152         /* Install the gatt. */
  153         AGP_SET_APERTURE(dev, sc->aperture);
  154 
  155         /* XXX: U3 scratch page? */
  156         
  157         /* Enable the aperture and TLB. */
  158         AGP_FLUSH_TLB(dev);
  159 
  160         return (0);
  161 }
  162 
  163 static int
  164 agp_apple_detach(device_t dev)
  165 {
  166         struct agp_apple_softc *sc = device_get_softc(dev);
  167 
  168         agp_free_cdev(dev);
  169 
  170         /* Disable the aperture and TLB */
  171         pci_write_config(dev, UNIN_AGP_GART_CONTROL, UNIN_AGP_GART_INVAL, 4);
  172         pci_write_config(dev, UNIN_AGP_GART_CONTROL, 0, 4);
  173 
  174         if (sc->needs_2x_reset) {
  175                 pci_write_config(dev, UNIN_AGP_GART_CONTROL,
  176                     UNIN_AGP_GART_2XRESET, 4);
  177                 pci_write_config(dev, UNIN_AGP_GART_CONTROL, 0, 4);
  178         }
  179 
  180         AGP_SET_APERTURE(dev, 0);
  181 
  182         agp_free_gatt(sc->gatt);
  183         agp_free_res(dev);
  184         return 0;
  185 }
  186 
  187 static uint32_t
  188 agp_apple_get_aperture(device_t dev)
  189 {
  190         struct agp_apple_softc *sc = device_get_softc(dev);
  191 
  192         return (sc->aperture);
  193 }
  194 
  195 static int
  196 agp_apple_set_aperture(device_t dev, uint32_t aperture)
  197 {
  198         struct agp_apple_softc *sc = device_get_softc(dev);
  199 
  200         /*
  201          * Check for a multiple of 4 MB and make sure it is within the
  202          * programmable range.
  203          */
  204         if (aperture % (4*1024*1024)
  205             || aperture < 4*1024*1024
  206             || aperture > ((sc->u3) ? 512 : 256)*1024*1024)
  207                 return EINVAL;
  208 
  209         /* The aperture value is a multiple of 4 MB */
  210         aperture /= (4*1024*1024);
  211 
  212         pci_write_config(dev, UNIN_AGP_GART_BASE,
  213             (sc->gatt->ag_physical & 0xfffff000) | aperture, 4);
  214         
  215         return (0);
  216 }
  217 
  218 static int
  219 agp_apple_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
  220 {
  221         struct agp_apple_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] = physical;
  227         return (0);
  228 }
  229 
  230 static int
  231 agp_apple_unbind_page(device_t dev, vm_offset_t offset)
  232 {
  233         struct agp_apple_softc *sc = device_get_softc(dev);
  234 
  235         if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
  236                 return EINVAL;
  237 
  238         sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
  239         return (0);
  240 }
  241 
  242 static void
  243 agp_apple_flush_tlb(device_t dev)
  244 {
  245         struct agp_apple_softc *sc = device_get_softc(dev);
  246         uint32_t cntrl = UNIN_AGP_GART_ENABLE;
  247 
  248         if (sc->u3)
  249                 cntrl |= UNIN_AGP_U3_GART_PERFRD;
  250 
  251         pci_write_config(dev, UNIN_AGP_GART_CONTROL,
  252             cntrl | UNIN_AGP_GART_INVAL, 4);
  253         pci_write_config(dev, UNIN_AGP_GART_CONTROL, cntrl, 4);
  254 
  255         if (sc->needs_2x_reset) {
  256                 pci_write_config(dev, UNIN_AGP_GART_CONTROL,
  257                     cntrl | UNIN_AGP_GART_2XRESET, 4);
  258                 pci_write_config(dev, UNIN_AGP_GART_CONTROL, cntrl, 4);
  259         }
  260 }
  261 
  262 static device_method_t agp_apple_methods[] = {
  263         /* Device interface */
  264         DEVMETHOD(device_probe,         agp_apple_probe),
  265         DEVMETHOD(device_attach,        agp_apple_attach),
  266         DEVMETHOD(device_detach,        agp_apple_detach),
  267         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  268         DEVMETHOD(device_suspend,       bus_generic_suspend),
  269         DEVMETHOD(device_resume,        bus_generic_resume),
  270 
  271         /* AGP interface */
  272         DEVMETHOD(agp_get_aperture,     agp_apple_get_aperture),
  273         DEVMETHOD(agp_set_aperture,     agp_apple_set_aperture),
  274         DEVMETHOD(agp_bind_page,        agp_apple_bind_page),
  275         DEVMETHOD(agp_unbind_page,      agp_apple_unbind_page),
  276         DEVMETHOD(agp_flush_tlb,        agp_apple_flush_tlb),
  277         DEVMETHOD(agp_enable,           agp_generic_enable),
  278         DEVMETHOD(agp_alloc_memory,     agp_generic_alloc_memory),
  279         DEVMETHOD(agp_free_memory,      agp_generic_free_memory),
  280         DEVMETHOD(agp_bind_memory,      agp_generic_bind_memory),
  281         DEVMETHOD(agp_unbind_memory,    agp_generic_unbind_memory),
  282 
  283         { 0, 0 }
  284 };
  285 
  286 static driver_t agp_apple_driver = {
  287         "agp",
  288         agp_apple_methods,
  289         sizeof(struct agp_apple_softc),
  290 };
  291 
  292 static devclass_t agp_devclass;
  293 
  294 DRIVER_MODULE(agp_apple, hostb, agp_apple_driver, agp_devclass, 0, 0);
  295 MODULE_DEPEND(agp_apple, agp, 1, 1, 1);
  296 MODULE_DEPEND(agp_apple, pci, 1, 1, 1);

Cache object: 8bfb8f23059b26fde0e4aa1a99b9a2a9


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