src/mesa/drivers/dri/sis/sis_alloc.c

   1 /**************************************************************************
   2
   3 Copyright 2000 Silicon Integrated Systems Corp, Inc., HsinChu, Taiwan.
   4 Copyright 2003 Eric Anholt
   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 on the rights to use, copy, modify, merge, publish, distribute, sub
  11 license, and/or sell copies of the Software, and to permit persons to whom
  12 the 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 NON-INFRINGEMENT. IN NO EVENT SHALL
  21 ERIC ANHOLT OR SILICON INTEGRATED SYSTEMS CORP BE LIABLE FOR ANY CLAIM,
  22 DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23 OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24 USE OR OTHER DEALINGS IN THE SOFTWARE.
  25
  26 **************************************************************************/
  27 /* $XFree86: xc/lib/GL/mesa/src/drv/sis/sis_alloc.c,v 1.7 2001/01/08 01:07:29 martin Exp $ */
  28
  29 /*
  30  * Authors:
  31  *   Sung-Ching Lin <sclin@sis.com.tw>
  32  *   Eric Anholt <anholt@FreeBSD.org>
  33  */
  34
  35 #include "sis_context.h"
  36 #include "sis_alloc.h"
  37
  38 #include "sis_common.h"
  39
  40 #include <unistd.h>
  41
  42 #define Z_BUFFER_HW_ALIGNMENT 16
  43 #define Z_BUFFER_HW_PLUS (16 + 4)
  44
  45 /* 3D engine uses 2, and bitblt uses 4 */
  46 #define DRAW_BUFFER_HW_ALIGNMENT 16
  47 #define DRAW_BUFFER_HW_PLUS (16 + 4)
  48
  49 #define ALIGNMENT(value, align) (((value) + (align) - 1) / (align) * (align))
  50
  51 static int _total_video_memory_used = 0;
  52 static int _total_video_memory_count = 0;
  53
  54 void *
  55 sisAllocFB( sisContextPtr smesa, GLuint size, void **handle )
  56 {
  57    drm_sis_mem_t fb;
  58
  59    _total_video_memory_used += size;
  60
  61    fb.context = smesa->hHWContext;
  62    fb.size = size;
  63    if (drmCommandWriteRead( smesa->driFd, DRM_SIS_FB_ALLOC, &fb,
  64       sizeof(drm_sis_mem_t) ) || fb.offset == 0)
  65    {
  66       return NULL;
  67    }
  68    *handle = (void *)fb.free;
  69
  70    if (SIS_VERBOSE & VERBOSE_SIS_MEMORY) {
  71       fprintf(stderr, "sisAllocFB: size=%d, offset=%lu, pid=%d, count=%d\n",
  72               size, fb.offset, (GLint)getpid(),
  73               ++_total_video_memory_count);
  74    }
  75
  76    return (void *)(smesa->FbBase + fb.offset);
  77 }
  78
  79 void
  80 sisFreeFB( sisContextPtr smesa, void *handle )
  81 {
  82    drm_sis_mem_t fb;
  83
  84    if (SIS_VERBOSE & VERBOSE_SIS_MEMORY) {
  85       fprintf(stderr, "sisFreeFB: free=%p, pid=%d, count=%d\n",
  86               handle, (GLint)getpid(), --_total_video_memory_count);
  87    }
  88
  89    fb.context = smesa->hHWContext;
  90    fb.free = handle;
  91    drmCommandWrite( smesa->driFd, DRM_SIS_FB_FREE, &fb, sizeof(drm_sis_mem_t) );
  92 }
  93
  94 void *
  95 sisAllocAGP( sisContextPtr smesa, GLuint size, void **handle )
  96 {
  97    drm_sis_mem_t agp;
  98
  99    if (smesa->AGPSize == 0)
 100       return NULL;
 101
 102    agp.context = smesa->hHWContext;
 103    agp.size = size;
 104    if (drmCommandWriteRead( smesa->driFd, DRM_SIS_AGP_ALLOC, &agp,
 105       sizeof(drm_sis_mem_t) ) || agp.offset == 0)
 106    {
 107       return NULL;
 108    }
 109    *handle = (void *)agp.free;
 110
 111    if (SIS_VERBOSE & VERBOSE_SIS_MEMORY) {
 112       fprintf(stderr, "sisAllocAGP: size=%u, offset=%lu, pid=%d, count=%d\n",
 113               size, agp.offset, (GLint)getpid(),
 114               ++_total_video_memory_count);
 115    }
 116
 117    return (void *)(smesa->AGPBase + agp.offset);
 118 }
 119
 120 void
 121 sisFreeAGP( sisContextPtr smesa, void *handle )
 122 {
 123    drm_sis_mem_t agp;
 124
 125    if (SIS_VERBOSE & VERBOSE_SIS_MEMORY) {
 126       fprintf(stderr, "sisFreeAGP: free=%p, pid=%d, count=%d\n",
 127               handle, (GLint)getpid(), --_total_video_memory_count);
 128    }
 129
 130    agp.context = smesa->hHWContext;
 131    agp.free = handle;
 132    drmCommandWrite( smesa->driFd, DRM_SIS_AGP_FREE, &agp,
 133       sizeof(drm_sis_mem_t) );
 134 }
 135
 136 void
 137 sisAllocZStencilBuffer( sisContextPtr smesa )
 138 {
 139    int cpp = ( smesa->glCtx->Visual.depthBits +
 140                smesa->glCtx->Visual.stencilBits ) / 8;
 141    unsigned char *addr;
 142
 143    smesa->depth.bpp = cpp * 8;
 144    smesa->depth.pitch = ALIGNMENT(smesa->driDrawable->w * cpp, 4);
 145    smesa->depth.size = smesa->depth.pitch * smesa->driDrawable->h;
 146    smesa->depth.size += Z_BUFFER_HW_PLUS;
 147
 148    addr = sisAllocFB(smesa, smesa->depth.size, &smesa->depth.handle);
 149    if (addr == NULL)
 150       sis_fatal_error("Failure to allocate Z buffer.\n");
 151    addr = (char *)ALIGNMENT((unsigned long)addr, Z_BUFFER_HW_ALIGNMENT);
 152
 153    smesa->depth.map = addr;
 154    smesa->depth.offset = addr - smesa->FbBase;
 155
 156    /* stencil buffer is same as depth buffer */
 157    smesa->stencil.size = smesa->depth.size;
 158    smesa->stencil.offset = smesa->depth.offset;
 159    smesa->stencil.handle = smesa->depth.handle;
 160    smesa->stencil.pitch = smesa->depth.pitch;
 161    smesa->stencil.bpp = smesa->depth.bpp;
 162    smesa->stencil.map = smesa->depth.map;
 163 }
 164
 165 void
 166 sisFreeZStencilBuffer( sisContextPtr smesa )
 167 {
 168    sisFreeFB(smesa, smesa->depth.handle);
 169    smesa->depth.map = NULL;
 170    smesa->depth.offset = 0;
 171 }
 172
 173 void
 174 sisAllocBackbuffer( sisContextPtr smesa )
 175 {
 176    int cpp = smesa->bytesPerPixel;
 177    unsigned char *addr;
 178
 179    smesa->back.bpp = smesa->bytesPerPixel * 8;
 180    smesa->back.pitch = ALIGNMENT(smesa->driDrawable->w * cpp, 4);
 181    smesa->back.size = smesa->back.pitch * smesa->driDrawable->h;
 182    smesa->back.size += DRAW_BUFFER_HW_PLUS;
 183
 184    addr = sisAllocFB(smesa, smesa->back.size, &smesa->back.handle);
 185    if (addr == NULL)
 186       sis_fatal_error("Failure to allocate back buffer.\n");
 187    addr = (char *)ALIGNMENT((unsigned long)addr, DRAW_BUFFER_HW_ALIGNMENT);
 188
 189    smesa->back.map = addr;
 190    smesa->back.offset = addr - smesa->FbBase;
 191 }
 192
 193 void
 194 sisFreeBackbuffer( sisContextPtr smesa )
 195 {
 196    sisFreeFB(smesa, smesa->back.handle);
 197    smesa->back.map = NULL;
 198    smesa->back.offset = 0;
 199 }