sys/dev/drm/ati_pcigart.h

   1 /* ati_pcigart.h -- ATI PCI GART support -*- linux-c -*-
   2  * Created: Wed Dec 13 21:52:19 2000 by gareth@valinux.com
   3  *
   4  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the next
  15  * paragraph) shall be included in all copies or substantial portions of the
  16  * Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  22  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  23  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24  * DEALINGS IN THE SOFTWARE.
  25  *
  26  * Authors:
  27  *   Gareth Hughes <gareth@valinux.com>
  28  *
  29  * $FreeBSD: src/sys/dev/drm/ati_pcigart.h,v 1.1.2.1 2003/04/26 07:05:27 anholt Exp $
  30  * $DragonFly: src/sys/dev/drm/ati_pcigart.h,v 1.3 2004/02/13 02:23:57 joerg Exp $
  31  */
  32
  33 #include "dev/drm/drmP.h"
  34
  35 #if PAGE_SIZE == 8192
  36 # define ATI_PCIGART_TABLE_ORDER        2
  37 # define ATI_PCIGART_TABLE_PAGES        (1 << 2)
  38 #elif PAGE_SIZE == 4096
  39 # define ATI_PCIGART_TABLE_ORDER        3
  40 # define ATI_PCIGART_TABLE_PAGES        (1 << 3)
  41 #elif
  42 # error - PAGE_SIZE not 8K or 4K
  43 #endif
  44
  45 # define ATI_MAX_PCIGART_PAGES          8192    /* 32 MB aperture, 4K pages */
  46 # define ATI_PCIGART_PAGE_SIZE          4096    /* PCI GART page size */
  47
  48 int DRM(ati_pcigart_init)( drm_device_t *dev,
  49                            unsigned long *addr,
  50                            dma_addr_t *bus_addr)
  51 {
  52         drm_sg_mem_t *entry = dev->sg;
  53         unsigned long address = 0;
  54         unsigned long pages;
  55         u32 *pci_gart=0, page_base, bus_address = 0;
  56         int i, j, ret = 0;
  57
  58         if ( !entry ) {
  59                 DRM_ERROR( "no scatter/gather memory!\n" );
  60                 goto done;
  61         }
  62
  63         address = (long)contigmalloc((1 << ATI_PCIGART_TABLE_ORDER) * PAGE_SIZE,
  64             DRM(M_DRM), M_WAITOK, 0ul, 0xfffffffful, PAGE_SIZE, 0);
  65         if ( !address ) {
  66                 DRM_ERROR( "cannot allocate PCI GART page!\n" );
  67                 goto done;
  68         }
  69
  70         /* XXX: we need to busdma this */
  71         bus_address = vtophys( address );
  72
  73         pci_gart = (u32 *)address;
  74
  75         pages = ( entry->pages <= ATI_MAX_PCIGART_PAGES )
  76                 ? entry->pages : ATI_MAX_PCIGART_PAGES;
  77
  78         bzero( pci_gart, ATI_MAX_PCIGART_PAGES * sizeof(u32) );
  79
  80         for ( i = 0 ; i < pages ; i++ ) {
  81                 entry->busaddr[i] = vtophys( entry->handle + (i*PAGE_SIZE) );
  82                 page_base = (u32) entry->busaddr[i];
  83
  84                 for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); j++) {
  85                         *pci_gart++ = cpu_to_le32( page_base );
  86                         page_base += ATI_PCIGART_PAGE_SIZE;
  87                 }
  88         }
  89
  90         ret = 1;
  91
  92 done:
  93         *addr = address;
  94         *bus_addr = bus_address;
  95         return ret;
  96 }
  97
  98 int DRM(ati_pcigart_cleanup)( drm_device_t *dev,
  99                               unsigned long addr,
 100                               dma_addr_t bus_addr)
 101 {
 102         drm_sg_mem_t *entry = dev->sg;
 103
 104         /* we need to support large memory configurations */
 105         if ( !entry ) {
 106                 DRM_ERROR( "no scatter/gather memory!\n" );
 107                 return 0;
 108         }
 109
 110 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
 111         contigfree( (void *)addr, (1 << ATI_PCIGART_TABLE_ORDER) * PAGE_SIZE, DRM(M_DRM));      /* Not available on 4.x */
 112 #endif
 113         return 1;
 114 }