agp_i810.c

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    1 /*-
    2  * Copyright (c) 2000 Doug Rabson
    3  * Copyright (c) 2000 Ruslan Ermilov
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  */
   27 
   28 /*
   29  * Fixes for 830/845G support: David Dawes <dawes@xfree86.org>
   30  * 852GM/855GM/865G support added by David Dawes <dawes@xfree86.org>
   31  */
   32 
   33 #include <sys/cdefs.h>
   34 __FBSDID("$FreeBSD: releng/5.2/sys/pci/agp_i810.c 121437 2003-10-23 17:48:30Z jhb $");
   35 
   36 #include "opt_bus.h"
   37 
   38 #include <sys/param.h>
   39 #include <sys/systm.h>
   40 #include <sys/malloc.h>
   41 #include <sys/kernel.h>
   42 #include <sys/bus.h>
   43 #include <sys/lock.h>
   44 #include <sys/lockmgr.h>
   45 #include <sys/mutex.h>
   46 #include <sys/proc.h>
   47 
   48 #include <dev/pci/pcivar.h>
   49 #include <dev/pci/pcireg.h>
   50 #include <pci/agppriv.h>
   51 #include <pci/agpreg.h>
   52 
   53 #include <vm/vm.h>
   54 #include <vm/vm_object.h>
   55 #include <vm/vm_page.h>
   56 #include <vm/vm_pageout.h>
   57 #include <vm/pmap.h>
   58 
   59 #include <machine/bus.h>
   60 #include <machine/resource.h>
   61 #include <sys/rman.h>
   62 
   63 MALLOC_DECLARE(M_AGP);
   64 
   65 #define READ1(off)      bus_space_read_1(sc->bst, sc->bsh, off)
   66 #define READ4(off)      bus_space_read_4(sc->bst, sc->bsh, off)
   67 #define WRITE4(off,v)   bus_space_write_4(sc->bst, sc->bsh, off, v)
   68 
   69 #define CHIP_I810 0     /* i810/i815 */
   70 #define CHIP_I830 1     /* 830M/845G */
   71 #define CHIP_I855 2     /* 852GM/855GM/865G */
   72 
   73 struct agp_i810_softc {
   74         struct agp_softc agp;
   75         u_int32_t initial_aperture;     /* aperture size at startup */
   76         struct agp_gatt *gatt;
   77         int chiptype;                   /* i810-like or i830 */
   78         u_int32_t dcache_size;          /* i810 only */
   79         u_int32_t stolen;               /* number of i830/845 gtt entries for stolen memory */
   80         device_t bdev;                  /* bridge device */
   81         struct resource *regs;          /* memory mapped GC registers */
   82         bus_space_tag_t bst;            /* bus_space tag */
   83         bus_space_handle_t bsh;         /* bus_space handle */
   84 };
   85 
   86 static const char*
   87 agp_i810_match(device_t dev)
   88 {
   89         if (pci_get_class(dev) != PCIC_DISPLAY
   90             || pci_get_subclass(dev) != PCIS_DISPLAY_VGA)
   91                 return NULL;
   92 
   93         switch (pci_get_devid(dev)) {
   94         case 0x71218086:
   95                 return ("Intel 82810 (i810 GMCH) SVGA controller");
   96 
   97         case 0x71238086:
   98                 return ("Intel 82810-DC100 (i810-DC100 GMCH) SVGA controller");
   99 
  100         case 0x71258086:
  101                 return ("Intel 82810E (i810E GMCH) SVGA controller");
  102 
  103         case 0x11328086:
  104                 return ("Intel 82815 (i815 GMCH) SVGA controller");
  105 
  106         case 0x35778086:
  107                 return ("Intel 82830M (830M GMCH) SVGA controller");
  108 
  109         case 0x25628086:
  110                 return ("Intel 82845G (845G GMCH) SVGA controller");
  111 
  112         case 0x35828086:
  113                 switch (pci_read_config(dev, AGP_I85X_CAPID, 1)) {
  114                 case AGP_I855_GME:
  115                         return ("Intel 82855GME (855GME GMCH) SVGA controller");
  116 
  117                 case AGP_I855_GM:
  118                         return ("Intel 82855GM (855GM GMCH) SVGA controller");
  119 
  120                 case AGP_I852_GME:
  121                         return ("Intel 82852GME (852GME GMCH) SVGA controller");
  122 
  123                 case AGP_I852_GM:
  124                         return ("Intel 82852GM (852GM GMCH) SVGA controller");
  125 
  126                 default:
  127                         return ("Intel 8285xM (85xGM GMCH) SVGA controller");
  128                 }
  129 
  130         case 0x25728086:
  131                 return ("Intel 82865G (865G GMCH) SVGA controller");
  132         };
  133 
  134         return NULL;
  135 }
  136 
  137 /*
  138  * Find bridge device.
  139  */
  140 static device_t
  141 agp_i810_find_bridge(device_t dev)
  142 {
  143         device_t *children, child;
  144         int nchildren, i;
  145         u_int32_t devid;
  146 
  147         /*
  148          * Calculate bridge device's ID.
  149          */
  150         devid = pci_get_devid(dev);
  151         switch (devid) {
  152         case 0x71218086:
  153         case 0x71238086:
  154         case 0x71258086:
  155                 devid -= 0x10000;
  156                 break;
  157 
  158         case 0x11328086:
  159         case 0x35778086:
  160         case 0x25628086:
  161         case 0x35828086:
  162         case 0x25728086:
  163                 devid -= 0x20000;
  164                 break;
  165         };
  166         if (device_get_children(device_get_parent(dev), &children, &nchildren))
  167                 return 0;
  168 
  169         for (i = 0; i < nchildren; i++) {
  170                 child = children[i];
  171 
  172                 if (pci_get_devid(child) == devid) {
  173                         free(children, M_TEMP);
  174                         return child;
  175                 }
  176         }
  177         free(children, M_TEMP);
  178         return 0;
  179 }
  180 
  181 static int
  182 agp_i810_probe(device_t dev)
  183 {
  184         const char *desc;
  185 
  186         desc = agp_i810_match(dev);
  187         if (desc) {
  188                 device_t bdev;
  189                 u_int8_t smram;
  190                 unsigned int gcc1;
  191                 int devid = pci_get_devid(dev);
  192 
  193                 bdev = agp_i810_find_bridge(dev);
  194                 if (!bdev) {
  195                         if (bootverbose)
  196                                 printf("I810: can't find bridge device\n");
  197                         return ENXIO;
  198                 }
  199 
  200                 /*
  201                  * checking whether internal graphics device has been activated.
  202                  */
  203                 switch (devid) {
  204                         /* i810 */
  205                 case 0x71218086:
  206                 case 0x71238086:
  207                 case 0x71258086:
  208                 case 0x11328086:
  209                         smram = pci_read_config(bdev, AGP_I810_SMRAM, 1);
  210                         if ((smram & AGP_I810_SMRAM_GMS)
  211                             == AGP_I810_SMRAM_GMS_DISABLED) {
  212                                 if (bootverbose)
  213                                         printf("I810: disabled, not probing\n");
  214                                 return ENXIO;
  215                         }
  216                         break;
  217 
  218                         /* i830 */
  219                 case 0x35778086:
  220                 case 0x35828086:
  221                 case 0x25628086:
  222                 case 0x25728086:
  223                         gcc1 = pci_read_config(bdev, AGP_I830_GCC1, 1);
  224                         if ((gcc1 & AGP_I830_GCC1_DEV2) == AGP_I830_GCC1_DEV2_DISABLED) {
  225                                 if (bootverbose)
  226                                         printf("I830: disabled, not probing\n");
  227                                 return ENXIO;
  228                         }
  229                         break;
  230 
  231                 default:
  232                         return ENXIO;
  233                 }
  234 
  235                 device_verbose(dev);
  236                 device_set_desc(dev, desc);
  237                 return 0;
  238         }
  239 
  240         return ENXIO;
  241 }
  242 
  243 static int
  244 agp_i810_attach(device_t dev)
  245 {
  246         struct agp_i810_softc *sc = device_get_softc(dev);
  247         struct agp_gatt *gatt;
  248         int error, rid;
  249 
  250         sc->bdev = agp_i810_find_bridge(dev);
  251         if (!sc->bdev)
  252                 return ENOENT;
  253 
  254         error = agp_generic_attach(dev);
  255         if (error)
  256                 return error;
  257 
  258         switch (pci_get_devid(dev)) {
  259         case 0x71218086:
  260         case 0x71238086:
  261         case 0x71258086:
  262         case 0x11328086:
  263                 sc->chiptype = CHIP_I810;
  264                 break;
  265         case 0x35778086:
  266         case 0x25628086:
  267                 sc->chiptype = CHIP_I830;
  268                 break;
  269         case 0x35828086:
  270         case 0x25728086:
  271                 sc->chiptype = CHIP_I855;
  272                 break;
  273         };
  274 
  275         /* Same for i810 and i830 */
  276         rid = AGP_I810_MMADR;
  277         sc->regs = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
  278                                       0, ~0, 1, RF_ACTIVE);
  279         if (!sc->regs) {
  280                 agp_generic_detach(dev);
  281                 return ENOMEM;
  282         }
  283         sc->bst = rman_get_bustag(sc->regs);
  284         sc->bsh = rman_get_bushandle(sc->regs);
  285 
  286         sc->initial_aperture = AGP_GET_APERTURE(dev);
  287 
  288         gatt = malloc( sizeof(struct agp_gatt), M_AGP, M_NOWAIT);
  289         if (!gatt) {
  290                 agp_generic_detach(dev);
  291                 return ENOMEM;
  292         }
  293         sc->gatt = gatt;
  294 
  295         gatt->ag_entries = AGP_GET_APERTURE(dev) >> AGP_PAGE_SHIFT;
  296 
  297         if ( sc->chiptype == CHIP_I810 ) {
  298                 /* Some i810s have on-chip memory called dcache */
  299                 if (READ1(AGP_I810_DRT) & AGP_I810_DRT_POPULATED)
  300                         sc->dcache_size = 4 * 1024 * 1024;
  301                 else
  302                         sc->dcache_size = 0;
  303 
  304                 /* According to the specs the gatt on the i810 must be 64k */
  305                 gatt->ag_virtual = contigmalloc( 64 * 1024, M_AGP, 0, 
  306                                         0, ~0, PAGE_SIZE, 0);
  307                 if (!gatt->ag_virtual) {
  308                         if (bootverbose)
  309                                 device_printf(dev, "contiguous allocation failed\n");
  310                         free(gatt, M_AGP);
  311                         agp_generic_detach(dev);
  312                         return ENOMEM;
  313                 }
  314                 bzero(gatt->ag_virtual, gatt->ag_entries * sizeof(u_int32_t));
  315         
  316                 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
  317                 agp_flush_cache();
  318                 /* Install the GATT. */
  319                 WRITE4(AGP_I810_PGTBL_CTL, gatt->ag_physical | 1);
  320         } else if ( sc->chiptype == CHIP_I830 ) {
  321                 /* The i830 automatically initializes the 128k gatt on boot. */
  322                 unsigned int gcc1, pgtblctl;
  323                 
  324                 gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 1);
  325                 switch (gcc1 & AGP_I830_GCC1_GMS) {
  326                         case AGP_I830_GCC1_GMS_STOLEN_512:
  327                                 sc->stolen = (512 - 132) * 1024 / 4096;
  328                                 break;
  329                         case AGP_I830_GCC1_GMS_STOLEN_1024: 
  330                                 sc->stolen = (1024 - 132) * 1024 / 4096;
  331                                 break;
  332                         case AGP_I830_GCC1_GMS_STOLEN_8192: 
  333                                 sc->stolen = (8192 - 132) * 1024 / 4096;
  334                                 break;
  335                         default:
  336                                 sc->stolen = 0;
  337                                 device_printf(dev, "unknown memory configuration, disabling\n");
  338                                 agp_generic_detach(dev);
  339                                 return EINVAL;
  340                 }
  341                 if (sc->stolen > 0)
  342                         device_printf(dev, "detected %dk stolen memory\n", sc->stolen * 4);
  343                 device_printf(dev, "aperture size is %dM\n", sc->initial_aperture / 1024 / 1024);
  344 
  345                 /* GATT address is already in there, make sure it's enabled */
  346                 pgtblctl = READ4(AGP_I810_PGTBL_CTL);
  347                 pgtblctl |= 1;
  348                 WRITE4(AGP_I810_PGTBL_CTL, pgtblctl);
  349 
  350                 gatt->ag_physical = pgtblctl & ~1;
  351         } else {        /* CHIP_I855 */
  352                 /* The i855 automatically initializes the 128k gatt on boot. */
  353                 unsigned int gcc1, pgtblctl;
  354                 
  355                 gcc1 = pci_read_config(sc->bdev, AGP_I855_GCC1, 1);
  356                 switch (gcc1 & AGP_I855_GCC1_GMS) {
  357                         case AGP_I855_GCC1_GMS_STOLEN_1M:
  358                                 sc->stolen = (1024 - 132) * 1024 / 4096;
  359                                 break;
  360                         case AGP_I855_GCC1_GMS_STOLEN_4M: 
  361                                 sc->stolen = (4096 - 132) * 1024 / 4096;
  362                                 break;
  363                         case AGP_I855_GCC1_GMS_STOLEN_8M: 
  364                                 sc->stolen = (8192 - 132) * 1024 / 4096;
  365                                 break;
  366                         case AGP_I855_GCC1_GMS_STOLEN_16M: 
  367                                 sc->stolen = (16384 - 132) * 1024 / 4096;
  368                                 break;
  369                         case AGP_I855_GCC1_GMS_STOLEN_32M: 
  370                                 sc->stolen = (32768 - 132) * 1024 / 4096;
  371                                 break;
  372                         default:
  373                                 sc->stolen = 0;
  374                                 device_printf(dev, "unknown memory configuration, disabling\n");
  375                                 agp_generic_detach(dev);
  376                                 return EINVAL;
  377                 }
  378                 if (sc->stolen > 0)
  379                         device_printf(dev, "detected %dk stolen memory\n", sc->stolen * 4);
  380                 device_printf(dev, "aperture size is %dM\n", sc->initial_aperture / 1024 / 1024);
  381 
  382                 /* GATT address is already in there, make sure it's enabled */
  383                 pgtblctl = READ4(AGP_I810_PGTBL_CTL);
  384                 pgtblctl |= 1;
  385                 WRITE4(AGP_I810_PGTBL_CTL, pgtblctl);
  386 
  387                 gatt->ag_physical = pgtblctl & ~1;
  388         }
  389 
  390         /* Add a device for the drm to attach to */
  391         if (!device_add_child( dev, "drmsub", -1 ))
  392                 printf("out of memory...\n");
  393 
  394         return bus_generic_attach(dev);
  395 }
  396 
  397 static int
  398 agp_i810_detach(device_t dev)
  399 {
  400         struct agp_i810_softc *sc = device_get_softc(dev);
  401         int error;
  402         device_t child;
  403 
  404         error = agp_generic_detach(dev);
  405         if (error)
  406                 return error;
  407 
  408         /* Clear the GATT base. */
  409         if ( sc->chiptype == CHIP_I810 ) {
  410                 WRITE4(AGP_I810_PGTBL_CTL, 0);
  411         } else {
  412                 unsigned int pgtblctl;
  413                 pgtblctl = READ4(AGP_I810_PGTBL_CTL);
  414                 pgtblctl &= ~1;
  415                 WRITE4(AGP_I810_PGTBL_CTL, pgtblctl);
  416         }
  417 
  418         /* Put the aperture back the way it started. */
  419         AGP_SET_APERTURE(dev, sc->initial_aperture);
  420 
  421         if ( sc->chiptype == CHIP_I810 ) {
  422                 contigfree(sc->gatt->ag_virtual, 64 * 1024, M_AGP);
  423         }
  424         free(sc->gatt, M_AGP);
  425 
  426         bus_release_resource(dev, SYS_RES_MEMORY,
  427                              AGP_I810_MMADR, sc->regs);
  428 
  429         child = device_find_child( dev, "drmsub", 0 );
  430         if (child)
  431            device_delete_child( dev, child );
  432 
  433         return 0;
  434 }
  435 
  436 static u_int32_t
  437 agp_i810_get_aperture(device_t dev)
  438 {
  439         struct agp_i810_softc *sc = device_get_softc(dev);
  440 
  441         if ( sc->chiptype == CHIP_I810 ) {
  442                 u_int16_t miscc;
  443                 miscc = pci_read_config(sc->bdev, AGP_I810_MISCC, 2);
  444                 if ((miscc & AGP_I810_MISCC_WINSIZE) == AGP_I810_MISCC_WINSIZE_32)
  445                         return 32 * 1024 * 1024;
  446                 else
  447                         return 64 * 1024 * 1024;
  448         } else if ( sc->chiptype == CHIP_I830 ) {
  449                 unsigned int gcc1;
  450 
  451                 gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 2);
  452                 if ((gcc1 & AGP_I830_GCC1_GMASIZE) == AGP_I830_GCC1_GMASIZE_64)
  453                         return 64 * 1024 * 1024;
  454                 else
  455                         return 128 * 1024 * 1024;
  456         } else { /* CHIP_I855 */
  457                 return 128 * 1024 * 1024;
  458         }
  459 }
  460 
  461 static int
  462 agp_i810_set_aperture(device_t dev, u_int32_t aperture)
  463 {
  464         struct agp_i810_softc *sc = device_get_softc(dev);
  465         u_int16_t miscc;
  466 
  467         if ( sc->chiptype == CHIP_I810 ) {
  468                 /*
  469                  * Double check for sanity.
  470                  */
  471                 if (aperture != 32 * 1024 * 1024 && aperture != 64 * 1024 * 1024) {
  472                         device_printf(dev, "bad aperture size %d\n", aperture);
  473                         return EINVAL;
  474                 }
  475         
  476                 miscc = pci_read_config(sc->bdev, AGP_I810_MISCC, 2);
  477                 miscc &= ~AGP_I810_MISCC_WINSIZE;
  478                 if (aperture == 32 * 1024 * 1024)
  479                         miscc |= AGP_I810_MISCC_WINSIZE_32;
  480                 else
  481                         miscc |= AGP_I810_MISCC_WINSIZE_64;
  482         
  483                 pci_write_config(sc->bdev, AGP_I810_MISCC, miscc, 2);
  484         } else if ( sc->chiptype == CHIP_I830 ) {
  485                 unsigned int gcc1;
  486 
  487                 if (aperture != 64 * 1024 * 1024 && aperture != 128 * 1024 * 1024) {
  488                         device_printf(dev, "bad aperture size %d\n", aperture);
  489                         return EINVAL;
  490                 }
  491                 gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 2);
  492                 gcc1 &= ~AGP_I830_GCC1_GMASIZE;
  493                 if (aperture == 64 * 1024 * 1024)
  494                         gcc1 |= AGP_I830_GCC1_GMASIZE_64;
  495                 else
  496                         gcc1 |= AGP_I830_GCC1_GMASIZE_128;
  497 
  498                 pci_write_config(sc->bdev, AGP_I830_GCC1, gcc1, 2);
  499         } else {        /* CHIP_I855 */
  500                 if (aperture != 128 * 1024 * 1024) {
  501                         device_printf(dev, "bad aperture size %d\n", aperture);
  502                         return EINVAL;
  503                 }
  504         }
  505 
  506         return 0;
  507 }
  508 
  509 static int
  510 agp_i810_bind_page(device_t dev, int offset, vm_offset_t physical)
  511 {
  512         struct agp_i810_softc *sc = device_get_softc(dev);
  513 
  514         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) {
  515                 device_printf(dev, "failed: offset is 0x%08x, shift is %d, entries is %d\n", offset, AGP_PAGE_SHIFT, sc->gatt->ag_entries);
  516                 return EINVAL;
  517         }
  518 
  519         if ( sc->chiptype != CHIP_I810 ) {
  520                 if ( (offset >> AGP_PAGE_SHIFT) < sc->stolen ) {
  521                         device_printf(dev, "trying to bind into stolen memory");
  522                         return EINVAL;
  523                 }
  524         }
  525 
  526         WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4, physical | 1);
  527         return 0;
  528 }
  529 
  530 static int
  531 agp_i810_unbind_page(device_t dev, int offset)
  532 {
  533         struct agp_i810_softc *sc = device_get_softc(dev);
  534 
  535         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
  536                 return EINVAL;
  537 
  538         if ( sc->chiptype != CHIP_I810 ) {
  539                 if ( (offset >> AGP_PAGE_SHIFT) < sc->stolen ) {
  540                         device_printf(dev, "trying to unbind from stolen memory");
  541                         return EINVAL;
  542                 }
  543         }
  544 
  545         WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4, 0);
  546         return 0;
  547 }
  548 
  549 /*
  550  * Writing via memory mapped registers already flushes all TLBs.
  551  */
  552 static void
  553 agp_i810_flush_tlb(device_t dev)
  554 {
  555 }
  556 
  557 static int
  558 agp_i810_enable(device_t dev, u_int32_t mode)
  559 {
  560 
  561         return 0;
  562 }
  563 
  564 static struct agp_memory *
  565 agp_i810_alloc_memory(device_t dev, int type, vm_size_t size)
  566 {
  567         struct agp_i810_softc *sc = device_get_softc(dev);
  568         struct agp_memory *mem;
  569 
  570         if ((size & (AGP_PAGE_SIZE - 1)) != 0)
  571                 return 0;
  572 
  573         if (sc->agp.as_allocated + size > sc->agp.as_maxmem)
  574                 return 0;
  575 
  576         if (type == 1) {
  577                 /*
  578                  * Mapping local DRAM into GATT.
  579                  */
  580                 if ( sc->chiptype != CHIP_I810 )
  581                         return 0;
  582                 if (size != sc->dcache_size)
  583                         return 0;
  584         } else if (type == 2) {
  585                 /*
  586                  * Bogus mapping of a single page for the hardware cursor.
  587                  */
  588                 if (size != AGP_PAGE_SIZE)
  589                         return 0;
  590         }
  591 
  592         mem = malloc(sizeof *mem, M_AGP, M_WAITOK);
  593         mem->am_id = sc->agp.as_nextid++;
  594         mem->am_size = size;
  595         mem->am_type = type;
  596         if (type != 1)
  597                 mem->am_obj = vm_object_allocate(OBJT_DEFAULT,
  598                                                  atop(round_page(size)));
  599         else
  600                 mem->am_obj = 0;
  601 
  602         if (type == 2) {
  603                 /*
  604                  * Allocate and wire down the page now so that we can
  605                  * get its physical address.
  606                  */
  607                 vm_page_t m;
  608 
  609                 VM_OBJECT_LOCK(mem->am_obj);
  610                 m = vm_page_grab(mem->am_obj, 0,
  611                     VM_ALLOC_WIRED | VM_ALLOC_ZERO | VM_ALLOC_RETRY);
  612                 VM_OBJECT_UNLOCK(mem->am_obj);
  613                 if ((m->flags & PG_ZERO) == 0)
  614                         pmap_zero_page(m);
  615                 vm_page_lock_queues();
  616                 mem->am_physical = VM_PAGE_TO_PHYS(m);
  617                 vm_page_wakeup(m);
  618                 vm_page_unlock_queues();
  619         } else {
  620                 mem->am_physical = 0;
  621         }
  622 
  623         mem->am_offset = 0;
  624         mem->am_is_bound = 0;
  625         TAILQ_INSERT_TAIL(&sc->agp.as_memory, mem, am_link);
  626         sc->agp.as_allocated += size;
  627 
  628         return mem;
  629 }
  630 
  631 static int
  632 agp_i810_free_memory(device_t dev, struct agp_memory *mem)
  633 {
  634         struct agp_i810_softc *sc = device_get_softc(dev);
  635 
  636         if (mem->am_is_bound)
  637                 return EBUSY;
  638 
  639         if (mem->am_type == 2) {
  640                 /*
  641                  * Unwire the page which we wired in alloc_memory.
  642                  */
  643                 vm_page_t m;
  644 
  645                 VM_OBJECT_LOCK(mem->am_obj);
  646                 m = vm_page_lookup(mem->am_obj, 0);
  647                 VM_OBJECT_UNLOCK(mem->am_obj);
  648                 vm_page_lock_queues();
  649                 vm_page_unwire(m, 0);
  650                 vm_page_unlock_queues();
  651         }
  652 
  653         sc->agp.as_allocated -= mem->am_size;
  654         TAILQ_REMOVE(&sc->agp.as_memory, mem, am_link);
  655         if (mem->am_obj)
  656                 vm_object_deallocate(mem->am_obj);
  657         free(mem, M_AGP);
  658         return 0;
  659 }
  660 
  661 static int
  662 agp_i810_bind_memory(device_t dev, struct agp_memory *mem,
  663                      vm_offset_t offset)
  664 {
  665         struct agp_i810_softc *sc = device_get_softc(dev);
  666         vm_offset_t i;
  667 
  668         if (mem->am_type != 1)
  669                 return agp_generic_bind_memory(dev, mem, offset);
  670 
  671         if ( sc->chiptype != CHIP_I810 )
  672                 return EINVAL;
  673 
  674         for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
  675                 WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4,
  676                        i | 3);
  677         }
  678 
  679         return 0;
  680 }
  681 
  682 static int
  683 agp_i810_unbind_memory(device_t dev, struct agp_memory *mem)
  684 {
  685         struct agp_i810_softc *sc = device_get_softc(dev);
  686         vm_offset_t i;
  687 
  688         if (mem->am_type != 1)
  689                 return agp_generic_unbind_memory(dev, mem);
  690 
  691         if ( sc->chiptype != CHIP_I810 )
  692                 return EINVAL;
  693 
  694         for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
  695                 WRITE4(AGP_I810_GTT + (i >> AGP_PAGE_SHIFT) * 4, 0);
  696 
  697         return 0;
  698 }
  699 
  700 static int
  701 agp_i810_print_child(device_t dev, device_t child)
  702 {
  703         int retval = 0;
  704 
  705         retval += bus_print_child_header(dev, child);
  706         retval += printf(": (child of agp_i810.c)");
  707         retval += bus_print_child_footer(dev, child);
  708 
  709         return retval;
  710 }
  711 
  712 static device_method_t agp_i810_methods[] = {
  713         /* Device interface */
  714         DEVMETHOD(device_probe,         agp_i810_probe),
  715         DEVMETHOD(device_attach,        agp_i810_attach),
  716         DEVMETHOD(device_detach,        agp_i810_detach),
  717         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  718         DEVMETHOD(device_suspend,       bus_generic_suspend),
  719         DEVMETHOD(device_resume,        bus_generic_resume),
  720 
  721         /* AGP interface */
  722         DEVMETHOD(agp_get_aperture,     agp_i810_get_aperture),
  723         DEVMETHOD(agp_set_aperture,     agp_i810_set_aperture),
  724         DEVMETHOD(agp_bind_page,        agp_i810_bind_page),
  725         DEVMETHOD(agp_unbind_page,      agp_i810_unbind_page),
  726         DEVMETHOD(agp_flush_tlb,        agp_i810_flush_tlb),
  727         DEVMETHOD(agp_enable,           agp_i810_enable),
  728         DEVMETHOD(agp_alloc_memory,     agp_i810_alloc_memory),
  729         DEVMETHOD(agp_free_memory,      agp_i810_free_memory),
  730         DEVMETHOD(agp_bind_memory,      agp_i810_bind_memory),
  731         DEVMETHOD(agp_unbind_memory,    agp_i810_unbind_memory),
  732 
  733         /* bus methods */
  734         DEVMETHOD(bus_print_child,      agp_i810_print_child),
  735         DEVMETHOD(bus_alloc_resource,   bus_generic_alloc_resource),
  736         DEVMETHOD(bus_release_resource, bus_generic_release_resource),
  737         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
  738         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
  739         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
  740         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
  741         { 0, 0 }
  742 };
  743 
  744 static driver_t agp_i810_driver = {
  745         "agp",
  746         agp_i810_methods,
  747         sizeof(struct agp_i810_softc),
  748 };
  749 
  750 static devclass_t agp_devclass;
  751 
  752 DRIVER_MODULE(agp_i810, pci, agp_i810_driver, agp_devclass, 0, 0);
  753 MODULE_DEPEND(agp_i810, agp, 1, 1, 1);
  754 MODULE_DEPEND(agp_i810, pci, 1, 1, 1);
Cache object: 60ef3e3e3604b6b86d035b400a65100d
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FreeBSD/Linux Kernel Cross Reference sys/pci/agp_i810.c

FreeBSD/Linux Kernel Cross Reference
sys/pci/agp_i810.c
