agp_ati.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2005 Eric Anholt
    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  * Based on reading the Linux 2.6.8.1 driver by Dave Jones.
   29  */
   30 
   31 #include <sys/cdefs.h>
   32 __FBSDID("$FreeBSD$");
   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/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_extern.h>
   51 #include <vm/vm_kern.h>
   52 #include <vm/vm_object.h>
   53 #include <vm/pmap.h>
   54 #include <machine/bus.h>
   55 #include <machine/resource.h>
   56 #include <sys/rman.h>
   57 
   58 MALLOC_DECLARE(M_AGP);
   59 
   60 #define READ4(off)      bus_space_read_4(sc->bst, sc->bsh, off)
   61 #define WRITE4(off,v)   bus_space_write_4(sc->bst, sc->bsh, off, v)
   62 
   63 struct agp_ati_softc {
   64         struct agp_softc agp;
   65         struct resource *regs;  /* memory mapped control registers */
   66         bus_space_tag_t bst;    /* bus_space tag */
   67         bus_space_handle_t bsh; /* bus_space handle */
   68         u_int32_t       initial_aperture; /* aperture size at startup */
   69         char            is_rs300;
   70 
   71         /* The GATT */
   72         u_int32_t       ag_entries;
   73         u_int32_t      *ag_virtual;     /* virtual address of gatt */
   74         u_int32_t      *ag_vdir;        /* virtual address of page dir */
   75         vm_offset_t     ag_pdir;        /* physical address of page dir */
   76 };
   77 
   78 static const char*
   79 agp_ati_match(device_t dev)
   80 {
   81         if (pci_get_class(dev) != PCIC_BRIDGE ||
   82             pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
   83                 return NULL;
   84 
   85         if (agp_find_caps(dev) == 0)
   86                 return NULL;
   87 
   88         switch (pci_get_devid(dev)) {
   89         case 0xcab01002:
   90                 return ("ATI RS100 AGP bridge");
   91         case 0xcab21002:
   92                 return ("ATI RS200 AGP bridge");
   93         case 0xcbb21002:
   94                 return ("ATI RS200M AGP bridge");
   95         case 0xcab31002:
   96                 return ("ATI RS250 AGP bridge");
   97         case 0x58301002:
   98                 return ("ATI RS300_100 AGP bridge");
   99         case 0x58311002:
  100                 return ("ATI RS300_133 AGP bridge");
  101         case 0x58321002:
  102                 return ("ATI RS300_166 AGP bridge");
  103         case 0x58331002:
  104                 return ("ATI RS300_200 AGP bridge");
  105         }
  106 
  107         return NULL;
  108 }
  109 
  110 static int
  111 agp_ati_probe(device_t dev)
  112 {
  113         const char *desc;
  114 
  115         desc = agp_ati_match(dev);
  116         if (desc) {
  117                 device_set_desc(dev, desc);
  118                 return 0;
  119         }
  120 
  121         return ENXIO;
  122 }
  123 
  124 static int
  125 agp_ati_alloc_gatt(device_t dev)
  126 {
  127         struct agp_ati_softc *sc = device_get_softc(dev);
  128         u_int32_t apsize = AGP_GET_APERTURE(dev);
  129         u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
  130         u_int32_t apbase_offset;
  131         int i;
  132 
  133         /* Alloc the GATT -- pointers to pages of AGP memory */
  134         sc->ag_entries = entries;
  135         sc->ag_virtual = (void *)kmem_alloc_attr(entries * sizeof(u_int32_t),
  136             M_NOWAIT | M_ZERO, 0, ~0, VM_MEMATTR_WRITE_COMBINING);
  137         if (sc->ag_virtual == NULL) {
  138                 if (bootverbose)
  139                         device_printf(dev, "GATT allocation failed\n");
  140                 return ENOMEM;
  141         }
  142 
  143         /* Alloc the page directory -- pointers to each page of the GATT */
  144         sc->ag_vdir = (void *)kmem_alloc_attr(AGP_PAGE_SIZE, M_NOWAIT | M_ZERO,
  145             0, ~0, VM_MEMATTR_WRITE_COMBINING);
  146         if (sc->ag_vdir == NULL) {
  147                 if (bootverbose)
  148                         device_printf(dev, "pagedir allocation failed\n");
  149                 kmem_free((vm_offset_t)sc->ag_virtual, entries *
  150                     sizeof(u_int32_t));
  151                 return ENOMEM;
  152         }
  153         sc->ag_pdir = vtophys((vm_offset_t)sc->ag_vdir);
  154 
  155         apbase_offset = pci_read_config(dev, AGP_APBASE, 4) >> 22;
  156         /* Fill in the pagedir's pointers to GATT pages */
  157         for (i = 0; i < sc->ag_entries / 1024; i++) {
  158                 vm_offset_t va;
  159                 vm_offset_t pa;
  160 
  161                 va = ((vm_offset_t)sc->ag_virtual) + i * AGP_PAGE_SIZE;
  162                 pa = vtophys(va);
  163                 sc->ag_vdir[apbase_offset + i] = pa | 1;
  164         }
  165 
  166         return 0;
  167 }
  168 
  169 static int
  170 agp_ati_attach(device_t dev)
  171 {
  172         struct agp_ati_softc *sc = device_get_softc(dev);
  173         int error, rid;
  174         u_int32_t temp;
  175         u_int32_t apsize_reg, agpmode_reg;
  176 
  177         error = agp_generic_attach(dev);
  178         if (error)
  179                 return error;
  180 
  181         switch (pci_get_devid(dev)) {
  182         case 0xcab01002: /* ATI RS100 AGP bridge */
  183         case 0xcab21002: /* ATI RS200 AGP bridge */
  184         case 0xcbb21002: /* ATI RS200M AGP bridge */
  185         case 0xcab31002: /* ATI RS250 AGP bridge */
  186                 sc->is_rs300 = 0;
  187                 apsize_reg = ATI_RS100_APSIZE;
  188                 agpmode_reg = ATI_RS100_IG_AGPMODE;
  189                 break;
  190         case 0x58301002: /* ATI RS300_100 AGP bridge */
  191         case 0x58311002: /* ATI RS300_133 AGP bridge */
  192         case 0x58321002: /* ATI RS300_166 AGP bridge */
  193         case 0x58331002: /* ATI RS300_200 AGP bridge */
  194                 sc->is_rs300 = 1;
  195                 apsize_reg = ATI_RS300_APSIZE;
  196                 agpmode_reg = ATI_RS300_IG_AGPMODE;
  197                 break;
  198         default:
  199                 /* Unknown chipset */
  200                 return EINVAL;
  201         }
  202 
  203         rid = ATI_GART_MMADDR;
  204         sc->regs = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
  205         if (!sc->regs) {
  206                 agp_generic_detach(dev);
  207                 return ENOMEM;
  208         }
  209 
  210         sc->bst = rman_get_bustag(sc->regs);
  211         sc->bsh = rman_get_bushandle(sc->regs);
  212 
  213         sc->initial_aperture = AGP_GET_APERTURE(dev);
  214 
  215         for (;;) {
  216                 if (agp_ati_alloc_gatt(dev) == 0)
  217                         break;
  218 
  219                 /*
  220                  * Probably contigmalloc failure. Try reducing the
  221                  * aperture so that the gatt size reduces.
  222                  */
  223                 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2))
  224                         return ENOMEM;
  225         }
  226 
  227         temp = pci_read_config(dev, apsize_reg, 4);
  228         pci_write_config(dev, apsize_reg, temp | 1, 4);
  229 
  230         pci_write_config(dev, agpmode_reg, 0x20000, 4);
  231 
  232         WRITE4(ATI_GART_FEATURE_ID, 0x00060000);
  233 
  234         temp = pci_read_config(dev, 4, 4);      /* XXX: Magic reg# */
  235         pci_write_config(dev, 4, temp | (1 << 14), 4);
  236 
  237         WRITE4(ATI_GART_BASE, sc->ag_pdir);
  238 
  239         AGP_FLUSH_TLB(dev);
  240 
  241         return 0;
  242 }
  243 
  244 static int
  245 agp_ati_detach(device_t dev)
  246 {
  247         struct agp_ati_softc *sc = device_get_softc(dev);
  248         u_int32_t apsize_reg, temp;
  249 
  250         agp_free_cdev(dev);
  251 
  252         if (sc->is_rs300)
  253                 apsize_reg = ATI_RS300_APSIZE;
  254         else
  255                 apsize_reg = ATI_RS100_APSIZE;
  256 
  257         /* Clear the GATT base */
  258         WRITE4(ATI_GART_BASE, 0);
  259 
  260         /* Put the aperture back the way it started. */
  261         AGP_SET_APERTURE(dev, sc->initial_aperture);
  262 
  263         temp = pci_read_config(dev, apsize_reg, 4);
  264         pci_write_config(dev, apsize_reg, temp & ~1, 4);
  265 
  266         kmem_free((vm_offset_t)sc->ag_vdir, AGP_PAGE_SIZE);
  267         kmem_free((vm_offset_t)sc->ag_virtual, sc->ag_entries *
  268             sizeof(u_int32_t));
  269 
  270         bus_release_resource(dev, SYS_RES_MEMORY, ATI_GART_MMADDR, sc->regs);
  271         agp_free_res(dev);
  272 
  273         return 0;
  274 }
  275 
  276 static u_int32_t
  277 agp_ati_get_aperture(device_t dev)
  278 {
  279         struct agp_ati_softc *sc = device_get_softc(dev);
  280         int size_value;
  281 
  282         if (sc->is_rs300)
  283                 size_value = pci_read_config(dev, ATI_RS300_APSIZE, 4);
  284         else
  285                 size_value = pci_read_config(dev, ATI_RS100_APSIZE, 4);
  286 
  287         size_value = (size_value & 0x0000000e) >> 1;
  288         size_value = (32 * 1024 * 1024) << size_value;
  289 
  290         return size_value;
  291 }
  292 
  293 static int
  294 agp_ati_set_aperture(device_t dev, u_int32_t aperture)
  295 {
  296         struct agp_ati_softc *sc = device_get_softc(dev);
  297         int size_value;
  298         u_int32_t apsize_reg;
  299 
  300         if (sc->is_rs300)
  301                 apsize_reg = ATI_RS300_APSIZE;
  302         else
  303                 apsize_reg = ATI_RS100_APSIZE;
  304 
  305         size_value = pci_read_config(dev, apsize_reg, 4);
  306 
  307         size_value &= ~0x0000000e;
  308         size_value |= (ffs(aperture / (32 * 1024 * 1024)) - 1) << 1;
  309 
  310         pci_write_config(dev, apsize_reg, size_value, 4);
  311 
  312         return 0;
  313 }
  314 
  315 static int
  316 agp_ati_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
  317 {
  318         struct agp_ati_softc *sc = device_get_softc(dev);
  319 
  320         if (offset >= (sc->ag_entries << AGP_PAGE_SHIFT))
  321                 return EINVAL;
  322 
  323         sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 1;
  324 
  325         return 0;
  326 }
  327 
  328 static int
  329 agp_ati_unbind_page(device_t dev, vm_offset_t offset)
  330 {
  331         struct agp_ati_softc *sc = device_get_softc(dev);
  332 
  333         if (offset >= (sc->ag_entries << AGP_PAGE_SHIFT))
  334                 return EINVAL;
  335 
  336         sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
  337         return 0;
  338 }
  339 
  340 static void
  341 agp_ati_flush_tlb(device_t dev)
  342 {
  343         struct agp_ati_softc *sc = device_get_softc(dev);
  344 
  345         /* Set the cache invalidate bit and wait for the chipset to clear */
  346         WRITE4(ATI_GART_CACHE_CNTRL, 1);
  347         (void)READ4(ATI_GART_CACHE_CNTRL);
  348 }
  349 
  350 static device_method_t agp_ati_methods[] = {
  351         /* Device interface */
  352         DEVMETHOD(device_probe,         agp_ati_probe),
  353         DEVMETHOD(device_attach,        agp_ati_attach),
  354         DEVMETHOD(device_detach,        agp_ati_detach),
  355         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  356         DEVMETHOD(device_suspend,       bus_generic_suspend),
  357         DEVMETHOD(device_resume,        bus_generic_resume),
  358 
  359         /* AGP interface */
  360         DEVMETHOD(agp_get_aperture,     agp_ati_get_aperture),
  361         DEVMETHOD(agp_set_aperture,     agp_ati_set_aperture),
  362         DEVMETHOD(agp_bind_page,        agp_ati_bind_page),
  363         DEVMETHOD(agp_unbind_page,      agp_ati_unbind_page),
  364         DEVMETHOD(agp_flush_tlb,        agp_ati_flush_tlb),
  365         DEVMETHOD(agp_enable,           agp_generic_enable),
  366         DEVMETHOD(agp_alloc_memory,     agp_generic_alloc_memory),
  367         DEVMETHOD(agp_free_memory,      agp_generic_free_memory),
  368         DEVMETHOD(agp_bind_memory,      agp_generic_bind_memory),
  369         DEVMETHOD(agp_unbind_memory,    agp_generic_unbind_memory),
  370         { 0, 0 }
  371 };
  372 
  373 static driver_t agp_ati_driver = {
  374         "agp",
  375         agp_ati_methods,
  376         sizeof(struct agp_ati_softc),
  377 };
  378 
  379 static devclass_t agp_devclass;
  380 
  381 DRIVER_MODULE(agp_ati, hostb, agp_ati_driver, agp_devclass, 0, 0);
  382 MODULE_DEPEND(agp_ati, agp, 1, 1, 1);
  383 MODULE_DEPEND(agp_ati, pci, 1, 1, 1);
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FreeBSD/Linux Kernel Cross Reference sys/dev/agp/agp_ati.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/agp/agp_ati.c
