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: src/sys/pci/agp_i810.c,v 1.30.2.2 2005/03/23 05:59:42 alc Exp $");
   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/module.h>
   43 #include <sys/bus.h>
   44 #include <sys/lock.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         if (resource_disabled("agp", device_get_unit(dev)))
  187                 return (ENXIO);
  188         desc = agp_i810_match(dev);
  189         if (desc) {
  190                 device_t bdev;
  191                 u_int8_t smram;
  192                 unsigned int gcc1;
  193                 int devid = pci_get_devid(dev);
  194 
  195                 bdev = agp_i810_find_bridge(dev);
  196                 if (!bdev) {
  197                         if (bootverbose)
  198                                 printf("I810: can't find bridge device\n");
  199                         return ENXIO;
  200                 }
  201 
  202                 /*
  203                  * checking whether internal graphics device has been activated.
  204                  */
  205                 switch (devid) {
  206                         /* i810 */
  207                 case 0x71218086:
  208                 case 0x71238086:
  209                 case 0x71258086:
  210                 case 0x11328086:
  211                         smram = pci_read_config(bdev, AGP_I810_SMRAM, 1);
  212                         if ((smram & AGP_I810_SMRAM_GMS)
  213                             == AGP_I810_SMRAM_GMS_DISABLED) {
  214                                 if (bootverbose)
  215                                         printf("I810: disabled, not probing\n");
  216                                 return ENXIO;
  217                         }
  218                         break;
  219 
  220                         /* i830 */
  221                 case 0x35778086:
  222                 case 0x35828086:
  223                 case 0x25628086:
  224                 case 0x25728086:
  225                         gcc1 = pci_read_config(bdev, AGP_I830_GCC1, 1);
  226                         if ((gcc1 & AGP_I830_GCC1_DEV2) == AGP_I830_GCC1_DEV2_DISABLED) {
  227                                 if (bootverbose)
  228                                         printf("I830: disabled, not probing\n");
  229                                 return ENXIO;
  230                         }
  231                         break;
  232 
  233                 default:
  234                         return ENXIO;
  235                 }
  236 
  237                 device_verbose(dev);
  238                 device_set_desc(dev, desc);
  239                 return BUS_PROBE_DEFAULT;
  240         }
  241 
  242         return ENXIO;
  243 }
  244 
  245 static int
  246 agp_i810_attach(device_t dev)
  247 {
  248         struct agp_i810_softc *sc = device_get_softc(dev);
  249         struct agp_gatt *gatt;
  250         int error, rid;
  251 
  252         sc->bdev = agp_i810_find_bridge(dev);
  253         if (!sc->bdev)
  254                 return ENOENT;
  255 
  256         error = agp_generic_attach(dev);
  257         if (error)
  258                 return error;
  259 
  260         switch (pci_get_devid(dev)) {
  261         case 0x71218086:
  262         case 0x71238086:
  263         case 0x71258086:
  264         case 0x11328086:
  265                 sc->chiptype = CHIP_I810;
  266                 break;
  267         case 0x35778086:
  268         case 0x25628086:
  269                 sc->chiptype = CHIP_I830;
  270                 break;
  271         case 0x35828086:
  272         case 0x25728086:
  273                 sc->chiptype = CHIP_I855;
  274                 break;
  275         };
  276 
  277         /* Same for i810 and i830 */
  278         rid = AGP_I810_MMADR;
  279         sc->regs = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
  280                                           RF_ACTIVE);
  281         if (!sc->regs) {
  282                 agp_generic_detach(dev);
  283                 return ENOMEM;
  284         }
  285         sc->bst = rman_get_bustag(sc->regs);
  286         sc->bsh = rman_get_bushandle(sc->regs);
  287 
  288         sc->initial_aperture = AGP_GET_APERTURE(dev);
  289 
  290         gatt = malloc( sizeof(struct agp_gatt), M_AGP, M_NOWAIT);
  291         if (!gatt) {
  292                 agp_generic_detach(dev);
  293                 return ENOMEM;
  294         }
  295         sc->gatt = gatt;
  296 
  297         gatt->ag_entries = AGP_GET_APERTURE(dev) >> AGP_PAGE_SHIFT;
  298 
  299         if ( sc->chiptype == CHIP_I810 ) {
  300                 /* Some i810s have on-chip memory called dcache */
  301                 if (READ1(AGP_I810_DRT) & AGP_I810_DRT_POPULATED)
  302                         sc->dcache_size = 4 * 1024 * 1024;
  303                 else
  304                         sc->dcache_size = 0;
  305 
  306                 /* According to the specs the gatt on the i810 must be 64k */
  307                 gatt->ag_virtual = contigmalloc( 64 * 1024, M_AGP, 0, 
  308                                         0, ~0, PAGE_SIZE, 0);
  309                 if (!gatt->ag_virtual) {
  310                         if (bootverbose)
  311                                 device_printf(dev, "contiguous allocation failed\n");
  312                         free(gatt, M_AGP);
  313                         agp_generic_detach(dev);
  314                         return ENOMEM;
  315                 }
  316                 bzero(gatt->ag_virtual, gatt->ag_entries * sizeof(u_int32_t));
  317         
  318                 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
  319                 agp_flush_cache();
  320                 /* Install the GATT. */
  321                 WRITE4(AGP_I810_PGTBL_CTL, gatt->ag_physical | 1);
  322         } else if ( sc->chiptype == CHIP_I830 ) {
  323                 /* The i830 automatically initializes the 128k gatt on boot. */
  324                 unsigned int gcc1, pgtblctl;
  325                 
  326                 gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 1);
  327                 switch (gcc1 & AGP_I830_GCC1_GMS) {
  328                         case AGP_I830_GCC1_GMS_STOLEN_512:
  329                                 sc->stolen = (512 - 132) * 1024 / 4096;
  330                                 break;
  331                         case AGP_I830_GCC1_GMS_STOLEN_1024: 
  332                                 sc->stolen = (1024 - 132) * 1024 / 4096;
  333                                 break;
  334                         case AGP_I830_GCC1_GMS_STOLEN_8192: 
  335                                 sc->stolen = (8192 - 132) * 1024 / 4096;
  336                                 break;
  337                         default:
  338                                 sc->stolen = 0;
  339                                 device_printf(dev, "unknown memory configuration, disabling\n");
  340                                 agp_generic_detach(dev);
  341                                 return EINVAL;
  342                 }
  343                 if (sc->stolen > 0)
  344                         device_printf(dev, "detected %dk stolen memory\n", sc->stolen * 4);
  345                 device_printf(dev, "aperture size is %dM\n", sc->initial_aperture / 1024 / 1024);
  346 
  347                 /* GATT address is already in there, make sure it's enabled */
  348                 pgtblctl = READ4(AGP_I810_PGTBL_CTL);
  349                 pgtblctl |= 1;
  350                 WRITE4(AGP_I810_PGTBL_CTL, pgtblctl);
  351 
  352                 gatt->ag_physical = pgtblctl & ~1;
  353         } else {        /* CHIP_I855 */
  354                 /* The i855 automatically initializes the 128k gatt on boot. */
  355                 unsigned int gcc1, pgtblctl;
  356                 
  357                 gcc1 = pci_read_config(sc->bdev, AGP_I855_GCC1, 1);
  358                 switch (gcc1 & AGP_I855_GCC1_GMS) {
  359                         case AGP_I855_GCC1_GMS_STOLEN_1M:
  360                                 sc->stolen = (1024 - 132) * 1024 / 4096;
  361                                 break;
  362                         case AGP_I855_GCC1_GMS_STOLEN_4M: 
  363                                 sc->stolen = (4096 - 132) * 1024 / 4096;
  364                                 break;
  365                         case AGP_I855_GCC1_GMS_STOLEN_8M: 
  366                                 sc->stolen = (8192 - 132) * 1024 / 4096;
  367                                 break;
  368                         case AGP_I855_GCC1_GMS_STOLEN_16M: 
  369                                 sc->stolen = (16384 - 132) * 1024 / 4096;
  370                                 break;
  371                         case AGP_I855_GCC1_GMS_STOLEN_32M: 
  372                                 sc->stolen = (32768 - 132) * 1024 / 4096;
  373                                 break;
  374                         default:
  375                                 sc->stolen = 0;
  376                                 device_printf(dev, "unknown memory configuration, disabling\n");
  377                                 agp_generic_detach(dev);
  378                                 return EINVAL;
  379                 }
  380                 if (sc->stolen > 0)
  381                         device_printf(dev, "detected %dk stolen memory\n", sc->stolen * 4);
  382                 device_printf(dev, "aperture size is %dM\n", sc->initial_aperture / 1024 / 1024);
  383 
  384                 /* GATT address is already in there, make sure it's enabled */
  385                 pgtblctl = READ4(AGP_I810_PGTBL_CTL);
  386                 pgtblctl |= 1;
  387                 WRITE4(AGP_I810_PGTBL_CTL, pgtblctl);
  388 
  389                 gatt->ag_physical = pgtblctl & ~1;
  390         }
  391 
  392         /* Add a device for the drm to attach to */
  393         if (!device_add_child( dev, "drmsub", -1 ))
  394                 printf("out of memory...\n");
  395 
  396         return bus_generic_attach(dev);
  397 }
  398 
  399 static int
  400 agp_i810_detach(device_t dev)
  401 {
  402         struct agp_i810_softc *sc = device_get_softc(dev);
  403         int error;
  404         device_t child;
  405 
  406         error = agp_generic_detach(dev);
  407         if (error)
  408                 return error;
  409 
  410         /* Clear the GATT base. */
  411         if ( sc->chiptype == CHIP_I810 ) {
  412                 WRITE4(AGP_I810_PGTBL_CTL, 0);
  413         } else {
  414                 unsigned int pgtblctl;
  415                 pgtblctl = READ4(AGP_I810_PGTBL_CTL);
  416                 pgtblctl &= ~1;
  417                 WRITE4(AGP_I810_PGTBL_CTL, pgtblctl);
  418         }
  419 
  420         /* Put the aperture back the way it started. */
  421         AGP_SET_APERTURE(dev, sc->initial_aperture);
  422 
  423         if ( sc->chiptype == CHIP_I810 ) {
  424                 contigfree(sc->gatt->ag_virtual, 64 * 1024, M_AGP);
  425         }
  426         free(sc->gatt, M_AGP);
  427 
  428         bus_release_resource(dev, SYS_RES_MEMORY,
  429                              AGP_I810_MMADR, sc->regs);
  430 
  431         child = device_find_child( dev, "drmsub", 0 );
  432         if (child)
  433            device_delete_child( dev, child );
  434 
  435         return 0;
  436 }
  437 
  438 static u_int32_t
  439 agp_i810_get_aperture(device_t dev)
  440 {
  441         struct agp_i810_softc *sc = device_get_softc(dev);
  442 
  443         if ( sc->chiptype == CHIP_I810 ) {
  444                 u_int16_t miscc;
  445                 miscc = pci_read_config(sc->bdev, AGP_I810_MISCC, 2);
  446                 if ((miscc & AGP_I810_MISCC_WINSIZE) == AGP_I810_MISCC_WINSIZE_32)
  447                         return 32 * 1024 * 1024;
  448                 else
  449                         return 64 * 1024 * 1024;
  450         } else if ( sc->chiptype == CHIP_I830 ) {
  451                 unsigned int gcc1;
  452 
  453                 gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 2);
  454                 if ((gcc1 & AGP_I830_GCC1_GMASIZE) == AGP_I830_GCC1_GMASIZE_64)
  455                         return 64 * 1024 * 1024;
  456                 else
  457                         return 128 * 1024 * 1024;
  458         } else { /* CHIP_I855 */
  459                 return 128 * 1024 * 1024;
  460         }
  461 }
  462 
  463 static int
  464 agp_i810_set_aperture(device_t dev, u_int32_t aperture)
  465 {
  466         struct agp_i810_softc *sc = device_get_softc(dev);
  467         u_int16_t miscc;
  468 
  469         if ( sc->chiptype == CHIP_I810 ) {
  470                 /*
  471                  * Double check for sanity.
  472                  */
  473                 if (aperture != 32 * 1024 * 1024 && aperture != 64 * 1024 * 1024) {
  474                         device_printf(dev, "bad aperture size %d\n", aperture);
  475                         return EINVAL;
  476                 }
  477         
  478                 miscc = pci_read_config(sc->bdev, AGP_I810_MISCC, 2);
  479                 miscc &= ~AGP_I810_MISCC_WINSIZE;
  480                 if (aperture == 32 * 1024 * 1024)
  481                         miscc |= AGP_I810_MISCC_WINSIZE_32;
  482                 else
  483                         miscc |= AGP_I810_MISCC_WINSIZE_64;
  484         
  485                 pci_write_config(sc->bdev, AGP_I810_MISCC, miscc, 2);
  486         } else if ( sc->chiptype == CHIP_I830 ) {
  487                 unsigned int gcc1;
  488 
  489                 if (aperture != 64 * 1024 * 1024 && aperture != 128 * 1024 * 1024) {
  490                         device_printf(dev, "bad aperture size %d\n", aperture);
  491                         return EINVAL;
  492                 }
  493                 gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 2);
  494                 gcc1 &= ~AGP_I830_GCC1_GMASIZE;
  495                 if (aperture == 64 * 1024 * 1024)
  496                         gcc1 |= AGP_I830_GCC1_GMASIZE_64;
  497                 else
  498                         gcc1 |= AGP_I830_GCC1_GMASIZE_128;
  499 
  500                 pci_write_config(sc->bdev, AGP_I830_GCC1, gcc1, 2);
  501         } else {        /* CHIP_I855 */
  502                 if (aperture != 128 * 1024 * 1024) {
  503                         device_printf(dev, "bad aperture size %d\n", aperture);
  504                         return EINVAL;
  505                 }
  506         }
  507 
  508         return 0;
  509 }
  510 
  511 static int
  512 agp_i810_bind_page(device_t dev, int offset, vm_offset_t physical)
  513 {
  514         struct agp_i810_softc *sc = device_get_softc(dev);
  515 
  516         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) {
  517                 device_printf(dev, "failed: offset is 0x%08x, shift is %d, entries is %d\n", offset, AGP_PAGE_SHIFT, sc->gatt->ag_entries);
  518                 return EINVAL;
  519         }
  520 
  521         if ( sc->chiptype != CHIP_I810 ) {
  522                 if ( (offset >> AGP_PAGE_SHIFT) < sc->stolen ) {
  523                         device_printf(dev, "trying to bind into stolen memory");
  524                         return EINVAL;
  525                 }
  526         }
  527 
  528         WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4, physical | 1);
  529         return 0;
  530 }
  531 
  532 static int
  533 agp_i810_unbind_page(device_t dev, int offset)
  534 {
  535         struct agp_i810_softc *sc = device_get_softc(dev);
  536 
  537         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
  538                 return EINVAL;
  539 
  540         if ( sc->chiptype != CHIP_I810 ) {
  541                 if ( (offset >> AGP_PAGE_SHIFT) < sc->stolen ) {
  542                         device_printf(dev, "trying to unbind from stolen memory");
  543                         return EINVAL;
  544                 }
  545         }
  546 
  547         WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4, 0);
  548         return 0;
  549 }
  550 
  551 /*
  552  * Writing via memory mapped registers already flushes all TLBs.
  553  */
  554 static void
  555 agp_i810_flush_tlb(device_t dev)
  556 {
  557 }
  558 
  559 static int
  560 agp_i810_enable(device_t dev, u_int32_t mode)
  561 {
  562 
  563         return 0;
  564 }
  565 
  566 static struct agp_memory *
  567 agp_i810_alloc_memory(device_t dev, int type, vm_size_t size)
  568 {
  569         struct agp_i810_softc *sc = device_get_softc(dev);
  570         struct agp_memory *mem;
  571 
  572         if ((size & (AGP_PAGE_SIZE - 1)) != 0)
  573                 return 0;
  574 
  575         if (sc->agp.as_allocated + size > sc->agp.as_maxmem)
  576                 return 0;
  577 
  578         if (type == 1) {
  579                 /*
  580                  * Mapping local DRAM into GATT.
  581                  */
  582                 if ( sc->chiptype != CHIP_I810 )
  583                         return 0;
  584                 if (size != sc->dcache_size)
  585                         return 0;
  586         } else if (type == 2) {
  587                 /*
  588                  * Bogus mapping of a single page for the hardware cursor.
  589                  */
  590                 if (size != AGP_PAGE_SIZE)
  591                         return 0;
  592         }
  593 
  594         mem = malloc(sizeof *mem, M_AGP, M_WAITOK);
  595         mem->am_id = sc->agp.as_nextid++;
  596         mem->am_size = size;
  597         mem->am_type = type;
  598         if (type != 1)
  599                 mem->am_obj = vm_object_allocate(OBJT_DEFAULT,
  600                                                  atop(round_page(size)));
  601         else
  602                 mem->am_obj = 0;
  603 
  604         if (type == 2) {
  605                 /*
  606                  * Allocate and wire down the page now so that we can
  607                  * get its physical address.
  608                  */
  609                 vm_page_t m;
  610 
  611                 VM_OBJECT_LOCK(mem->am_obj);
  612                 m = vm_page_grab(mem->am_obj, 0, VM_ALLOC_NOBUSY |
  613                     VM_ALLOC_WIRED | VM_ALLOC_ZERO | VM_ALLOC_RETRY);
  614                 VM_OBJECT_UNLOCK(mem->am_obj);
  615                 mem->am_physical = VM_PAGE_TO_PHYS(m);
  616         } else {
  617                 mem->am_physical = 0;
  618         }
  619 
  620         mem->am_offset = 0;
  621         mem->am_is_bound = 0;
  622         TAILQ_INSERT_TAIL(&sc->agp.as_memory, mem, am_link);
  623         sc->agp.as_allocated += size;
  624 
  625         return mem;
  626 }
  627 
  628 static int
  629 agp_i810_free_memory(device_t dev, struct agp_memory *mem)
  630 {
  631         struct agp_i810_softc *sc = device_get_softc(dev);
  632 
  633         if (mem->am_is_bound)
  634                 return EBUSY;
  635 
  636         if (mem->am_type == 2) {
  637                 /*
  638                  * Unwire the page which we wired in alloc_memory.
  639                  */
  640                 vm_page_t m;
  641 
  642                 VM_OBJECT_LOCK(mem->am_obj);
  643                 m = vm_page_lookup(mem->am_obj, 0);
  644                 VM_OBJECT_UNLOCK(mem->am_obj);
  645                 vm_page_lock_queues();
  646                 vm_page_unwire(m, 0);
  647                 vm_page_unlock_queues();
  648         }
  649 
  650         sc->agp.as_allocated -= mem->am_size;
  651         TAILQ_REMOVE(&sc->agp.as_memory, mem, am_link);
  652         if (mem->am_obj)
  653                 vm_object_deallocate(mem->am_obj);
  654         free(mem, M_AGP);
  655         return 0;
  656 }
  657 
  658 static int
  659 agp_i810_bind_memory(device_t dev, struct agp_memory *mem,
  660                      vm_offset_t offset)
  661 {
  662         struct agp_i810_softc *sc = device_get_softc(dev);
  663         vm_offset_t i;
  664 
  665         if (mem->am_type != 1)
  666                 return agp_generic_bind_memory(dev, mem, offset);
  667 
  668         if ( sc->chiptype != CHIP_I810 )
  669                 return EINVAL;
  670 
  671         for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
  672                 WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4,
  673                        i | 3);
  674         }
  675 
  676         return 0;
  677 }
  678 
  679 static int
  680 agp_i810_unbind_memory(device_t dev, struct agp_memory *mem)
  681 {
  682         struct agp_i810_softc *sc = device_get_softc(dev);
  683         vm_offset_t i;
  684 
  685         if (mem->am_type != 1)
  686                 return agp_generic_unbind_memory(dev, mem);
  687 
  688         if ( sc->chiptype != CHIP_I810 )
  689                 return EINVAL;
  690 
  691         for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
  692                 WRITE4(AGP_I810_GTT + (i >> AGP_PAGE_SHIFT) * 4, 0);
  693 
  694         return 0;
  695 }
  696 
  697 static int
  698 agp_i810_print_child(device_t dev, device_t child)
  699 {
  700         int retval = 0;
  701 
  702         retval += bus_print_child_header(dev, child);
  703         retval += printf(": (child of agp_i810.c)");
  704         retval += bus_print_child_footer(dev, child);
  705 
  706         return retval;
  707 }
  708 
  709 static device_method_t agp_i810_methods[] = {
  710         /* Device interface */
  711         DEVMETHOD(device_probe,         agp_i810_probe),
  712         DEVMETHOD(device_attach,        agp_i810_attach),
  713         DEVMETHOD(device_detach,        agp_i810_detach),
  714         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  715         DEVMETHOD(device_suspend,       bus_generic_suspend),
  716         DEVMETHOD(device_resume,        bus_generic_resume),
  717 
  718         /* AGP interface */
  719         DEVMETHOD(agp_get_aperture,     agp_i810_get_aperture),
  720         DEVMETHOD(agp_set_aperture,     agp_i810_set_aperture),
  721         DEVMETHOD(agp_bind_page,        agp_i810_bind_page),
  722         DEVMETHOD(agp_unbind_page,      agp_i810_unbind_page),
  723         DEVMETHOD(agp_flush_tlb,        agp_i810_flush_tlb),
  724         DEVMETHOD(agp_enable,           agp_i810_enable),
  725         DEVMETHOD(agp_alloc_memory,     agp_i810_alloc_memory),
  726         DEVMETHOD(agp_free_memory,      agp_i810_free_memory),
  727         DEVMETHOD(agp_bind_memory,      agp_i810_bind_memory),
  728         DEVMETHOD(agp_unbind_memory,    agp_i810_unbind_memory),
  729 
  730         /* bus methods */
  731         DEVMETHOD(bus_print_child,      agp_i810_print_child),
  732         DEVMETHOD(bus_alloc_resource,   bus_generic_alloc_resource),
  733         DEVMETHOD(bus_release_resource, bus_generic_release_resource),
  734         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
  735         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
  736         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
  737         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
  738         { 0, 0 }
  739 };
  740 
  741 static driver_t agp_i810_driver = {
  742         "agp",
  743         agp_i810_methods,
  744         sizeof(struct agp_i810_softc),
  745 };
  746 
  747 static devclass_t agp_devclass;
  748 
  749 DRIVER_MODULE(agp_i810, pci, agp_i810_driver, agp_devclass, 0, 0);
  750 MODULE_DEPEND(agp_i810, agp, 1, 1, 1);
  751 MODULE_DEPEND(agp_i810, pci, 1, 1, 1);
Cache object: 4ae9b4c671456ddc7c01d25876a6ad6b
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FreeBSD/Linux Kernel Cross Reference sys/pci/agp_i810.c

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