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/pci/agp_ati.c

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    1 /*-
    2  * Copyright (c) 2005 Eric Anholt
    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  * Based on reading the Linux 2.6.8.1 driver by Dave Jones.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD: releng/7.3/sys/pci/agp_ati.c 173477 2007-11-08 20:29:53Z jhb $");
   31 
   32 #include "opt_bus.h"
   33 
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/malloc.h>
   37 #include <sys/kernel.h>
   38 #include <sys/module.h>
   39 #include <sys/bus.h>
   40 #include <sys/lock.h>
   41 #include <sys/mutex.h>
   42 #include <sys/proc.h>
   43 
   44 #include <dev/pci/pcivar.h>
   45 #include <dev/pci/pcireg.h>
   46 #include <pci/agppriv.h>
   47 #include <pci/agpreg.h>
   48 
   49 #include <vm/vm.h>
   50 #include <vm/vm_object.h>
   51 #include <vm/pmap.h>
   52 #include <machine/bus.h>
   53 #include <machine/resource.h>
   54 #include <sys/rman.h>
   55 
   56 MALLOC_DECLARE(M_AGP);
   57 
   58 #define READ4(off)      bus_space_read_4(sc->bst, sc->bsh, off)
   59 #define WRITE4(off,v)   bus_space_write_4(sc->bst, sc->bsh, off, v)
   60 
   61 struct agp_ati_softc {
   62         struct agp_softc agp;
   63         struct resource *regs;  /* memory mapped control registers */
   64         bus_space_tag_t bst;    /* bus_space tag */
   65         bus_space_handle_t bsh; /* bus_space handle */
   66         u_int32_t       initial_aperture; /* aperture size at startup */
   67         char            is_rs300;
   68 
   69         /* The GATT */
   70         u_int32_t       ag_entries;
   71         u_int32_t      *ag_virtual;     /* virtual address of gatt */
   72         u_int32_t      *ag_vdir;        /* virtual address of page dir */
   73         vm_offset_t     ag_pdir;        /* physical address of page dir */
   74 };
   75 
   76 
   77 static const char*
   78 agp_ati_match(device_t dev)
   79 {
   80         if (pci_get_class(dev) != PCIC_BRIDGE ||
   81             pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
   82                 return NULL;
   83 
   84         if (agp_find_caps(dev) == 0)
   85                 return NULL;
   86 
   87         switch (pci_get_devid(dev)) {
   88         case 0xcab01002:
   89                 return ("ATI RS100 AGP bridge");
   90         case 0xcab21002:
   91                 return ("ATI RS200 AGP bridge");
   92         case 0xcbb21002:
   93                 return ("ATI RS200M AGP bridge");
   94         case 0xcab31002:
   95                 return ("ATI RS250 AGP bridge");
   96         case 0x58301002:
   97                 return ("ATI RS300_100 AGP bridge");
   98         case 0x58311002:
   99                 return ("ATI RS300_133 AGP bridge");
  100         case 0x58321002:
  101                 return ("ATI RS300_166 AGP bridge");
  102         case 0x58331002:
  103                 return ("ATI RS300_200 AGP bridge");
  104         };
  105 
  106         return NULL;
  107 }
  108 
  109 static int
  110 agp_ati_probe(device_t dev)
  111 {
  112         const char *desc;
  113 
  114         desc = agp_ati_match(dev);
  115         if (desc) {
  116                 device_set_desc(dev, desc);
  117                 return 0;
  118         }
  119 
  120         return ENXIO;
  121 }
  122 
  123 static int
  124 agp_ati_alloc_gatt(device_t dev)
  125 {
  126         struct agp_ati_softc *sc = device_get_softc(dev);
  127         u_int32_t apsize = AGP_GET_APERTURE(dev);
  128         u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
  129         u_int32_t apbase_offset;
  130         int i;
  131 
  132         /* Alloc the GATT -- pointers to pages of AGP memory */
  133         sc->ag_entries = entries;
  134         sc->ag_virtual = malloc(entries * sizeof(u_int32_t), M_AGP,
  135             M_NOWAIT | M_ZERO);
  136         if (sc->ag_virtual == NULL) {
  137                 if (bootverbose)
  138                         device_printf(dev, "aperture allocation failed\n");
  139                 return ENOMEM;
  140         }
  141 
  142         /* Alloc the page directory -- pointers to each page of the GATT */
  143         sc->ag_vdir = malloc(AGP_PAGE_SIZE, M_AGP, M_NOWAIT | M_ZERO);
  144         if (sc->ag_vdir == NULL) {
  145                 if (bootverbose)
  146                         device_printf(dev, "pagedir allocation failed\n");
  147                 free(sc->ag_virtual, M_AGP);
  148                 return ENOMEM;
  149         }
  150         sc->ag_pdir = vtophys((vm_offset_t)sc->ag_vdir);
  151 
  152         apbase_offset = pci_read_config(dev, AGP_APBASE, 4) >> 22;
  153         /* Fill in the pagedir's pointers to GATT pages */
  154         for (i = 0; i < sc->ag_entries / 1024; i++) {
  155                 vm_offset_t va;
  156                 vm_offset_t pa;
  157 
  158                 va = ((vm_offset_t)sc->ag_virtual) + i * AGP_PAGE_SIZE;
  159                 pa = vtophys(va);
  160                 sc->ag_vdir[apbase_offset + i] = pa | 1;
  161         }
  162 
  163         /*
  164          * Make sure the chipset can see everything.
  165          */
  166         agp_flush_cache();
  167 
  168         return 0;
  169 }
  170 
  171 
  172 static int
  173 agp_ati_attach(device_t dev)
  174 {
  175         struct agp_ati_softc *sc = device_get_softc(dev);
  176         int error, rid;
  177         u_int32_t temp;
  178         u_int32_t apsize_reg, agpmode_reg;
  179 
  180         error = agp_generic_attach(dev);
  181         if (error)
  182                 return error;
  183 
  184         switch (pci_get_devid(dev)) {
  185         case 0xcab01002: /* ATI RS100 AGP bridge */
  186         case 0xcab21002: /* ATI RS200 AGP bridge */
  187         case 0xcbb21002: /* ATI RS200M AGP bridge */
  188         case 0xcab31002: /* ATI RS250 AGP bridge */
  189                 sc->is_rs300 = 0;
  190                 apsize_reg = ATI_RS100_APSIZE;
  191                 agpmode_reg = ATI_RS100_IG_AGPMODE;
  192                 break;
  193         case 0x58301002: /* ATI RS300_100 AGP bridge */
  194         case 0x58311002: /* ATI RS300_133 AGP bridge */
  195         case 0x58321002: /* ATI RS300_166 AGP bridge */
  196         case 0x58331002: /* ATI RS300_200 AGP bridge */
  197                 sc->is_rs300 = 1;
  198                 apsize_reg = ATI_RS300_APSIZE;
  199                 agpmode_reg = ATI_RS300_IG_AGPMODE;
  200                 break;
  201         default:
  202                 /* Unknown chipset */
  203                 return EINVAL;
  204         };
  205 
  206         rid = ATI_GART_MMADDR;
  207         sc->regs = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
  208         if (!sc->regs) {
  209                 agp_generic_detach(dev);
  210                 return ENOMEM;
  211         }
  212 
  213         sc->bst = rman_get_bustag(sc->regs);
  214         sc->bsh = rman_get_bushandle(sc->regs);
  215 
  216         sc->initial_aperture = AGP_GET_APERTURE(dev);
  217 
  218         for (;;) {
  219                 if (agp_ati_alloc_gatt(dev) == 0)
  220                         break;
  221 
  222                 /*
  223                  * Probably contigmalloc failure. Try reducing the
  224                  * aperture so that the gatt size reduces.
  225                  */
  226                 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2))
  227                         return ENOMEM;
  228         }
  229 
  230         temp = pci_read_config(dev, apsize_reg, 4);
  231         pci_write_config(dev, apsize_reg, temp | 1, 4);
  232 
  233         pci_write_config(dev, agpmode_reg, 0x20000, 4);
  234 
  235         WRITE4(ATI_GART_FEATURE_ID, 0x00060000);
  236 
  237         temp = pci_read_config(dev, 4, 4);      /* XXX: Magic reg# */
  238         pci_write_config(dev, 4, temp | (1 << 14), 4);
  239 
  240         WRITE4(ATI_GART_BASE, sc->ag_pdir);
  241 
  242         AGP_FLUSH_TLB(dev);
  243 
  244         return 0;
  245 }
  246 
  247 static int
  248 agp_ati_detach(device_t dev)
  249 {
  250         struct agp_ati_softc *sc = device_get_softc(dev);
  251         u_int32_t apsize_reg, temp;
  252 
  253         agp_free_cdev(dev);
  254 
  255         if (sc->is_rs300)
  256                 apsize_reg = ATI_RS300_APSIZE;
  257         else
  258                 apsize_reg = ATI_RS100_APSIZE;
  259 
  260         /* Clear the GATT base */
  261         WRITE4(ATI_GART_BASE, 0);
  262 
  263         /* Put the aperture back the way it started. */
  264         AGP_SET_APERTURE(dev, sc->initial_aperture);
  265 
  266         temp = pci_read_config(dev, apsize_reg, 4);
  267         pci_write_config(dev, apsize_reg, temp & ~1, 4);
  268 
  269         free(sc->ag_vdir, M_AGP);
  270         free(sc->ag_virtual, M_AGP);
  271 
  272         bus_release_resource(dev, SYS_RES_MEMORY, ATI_GART_MMADDR, sc->regs);
  273         agp_free_res(dev);
  274 
  275         return 0;
  276 }
  277 
  278 static u_int32_t
  279 agp_ati_get_aperture(device_t dev)
  280 {
  281         struct agp_ati_softc *sc = device_get_softc(dev);
  282         int size_value;
  283 
  284         if (sc->is_rs300)
  285                 size_value = pci_read_config(dev, ATI_RS300_APSIZE, 4);
  286         else
  287                 size_value = pci_read_config(dev, ATI_RS100_APSIZE, 4);
  288 
  289         size_value = (size_value & 0x0000000e) >> 1;
  290         size_value = (32 * 1024 * 1024) << size_value;
  291 
  292         return size_value;
  293 }
  294 
  295 static int
  296 agp_ati_set_aperture(device_t dev, u_int32_t aperture)
  297 {
  298         struct agp_ati_softc *sc = device_get_softc(dev);
  299         int size_value;
  300         u_int32_t apsize_reg;
  301 
  302         if (sc->is_rs300)
  303                 apsize_reg = ATI_RS300_APSIZE;
  304         else
  305                 apsize_reg = ATI_RS100_APSIZE;
  306 
  307         size_value = pci_read_config(dev, apsize_reg, 4);
  308 
  309         size_value &= ~0x0000000e;
  310         size_value |= (ffs(aperture / (32 * 1024 * 1024)) - 1) << 1;
  311 
  312         pci_write_config(dev, apsize_reg, size_value, 4);
  313 
  314         return 0;
  315 }
  316 
  317 static int
  318 agp_ati_bind_page(device_t dev, int offset, vm_offset_t physical)
  319 {
  320         struct agp_ati_softc *sc = device_get_softc(dev);
  321 
  322         if (offset < 0 || offset >= (sc->ag_entries << AGP_PAGE_SHIFT))
  323                 return EINVAL;
  324 
  325         sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 1;
  326 
  327         return 0;
  328 }
  329 
  330 static int
  331 agp_ati_unbind_page(device_t dev, int offset)
  332 {
  333         struct agp_ati_softc *sc = device_get_softc(dev);
  334 
  335         if (offset < 0 || offset >= (sc->ag_entries << AGP_PAGE_SHIFT))
  336                 return EINVAL;
  337 
  338         sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
  339         return 0;
  340 }
  341 
  342 static void
  343 agp_ati_flush_tlb(device_t dev)
  344 {
  345         struct agp_ati_softc *sc = device_get_softc(dev);
  346 
  347         /* Set the cache invalidate bit and wait for the chipset to clear */
  348         WRITE4(ATI_GART_CACHE_CNTRL, 1);
  349         (void)READ4(ATI_GART_CACHE_CNTRL);
  350 }
  351 
  352 static device_method_t agp_ati_methods[] = {
  353         /* Device interface */
  354         DEVMETHOD(device_probe,         agp_ati_probe),
  355         DEVMETHOD(device_attach,        agp_ati_attach),
  356         DEVMETHOD(device_detach,        agp_ati_detach),
  357         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  358         DEVMETHOD(device_suspend,       bus_generic_suspend),
  359         DEVMETHOD(device_resume,        bus_generic_resume),
  360 
  361         /* AGP interface */
  362         DEVMETHOD(agp_get_aperture,     agp_ati_get_aperture),
  363         DEVMETHOD(agp_set_aperture,     agp_ati_set_aperture),
  364         DEVMETHOD(agp_bind_page,        agp_ati_bind_page),
  365         DEVMETHOD(agp_unbind_page,      agp_ati_unbind_page),
  366         DEVMETHOD(agp_flush_tlb,        agp_ati_flush_tlb),
  367         DEVMETHOD(agp_enable,           agp_generic_enable),
  368         DEVMETHOD(agp_alloc_memory,     agp_generic_alloc_memory),
  369         DEVMETHOD(agp_free_memory,      agp_generic_free_memory),
  370         DEVMETHOD(agp_bind_memory,      agp_generic_bind_memory),
  371         DEVMETHOD(agp_unbind_memory,    agp_generic_unbind_memory),
  372 
  373         { 0, 0 }
  374 };
  375 
  376 static driver_t agp_ati_driver = {
  377         "agp",
  378         agp_ati_methods,
  379         sizeof(struct agp_ati_softc),
  380 };
  381 
  382 static devclass_t agp_devclass;
  383 
  384 DRIVER_MODULE(agp_ati, hostb, agp_ati_driver, agp_devclass, 0, 0);
  385 MODULE_DEPEND(agp_ati, agp, 1, 1, 1);
  386 MODULE_DEPEND(agp_ati, pci, 1, 1, 1);

Cache object: 9238f6cd79e6ef4f573a399ab71bd3b2


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