src/mesa/drivers/dri/unichrome/via_ioctl.h

   1 /*
   2  * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
   3  * Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sub license,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the
  13  * next paragraph) shall be included in all copies or substantial portions
  14  * of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  19  * VIA, S3 GRAPHICS, AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 #ifndef _VIAIOCTL_H
  26 #define _VIAIOCTL_H
  27
  28 #include "via_context.h"
  29
  30
  31 void viaFinishPrimitive(viaContextPtr vmesa);
  32 void viaFlushDma(viaContextPtr vmesa);
  33 void viaFlushDmaLocked(viaContextPtr vmesa, GLuint flags);
  34
  35 void viaInitIoctlFuncs(GLcontext *ctx);
  36 void viaCopyBuffer(const __DRIdrawablePrivate *dpriv);
  37 void viaPageFlip(const __DRIdrawablePrivate *dpriv);
  38 void viaCheckDma(viaContextPtr vmesa, GLuint bytes);
  39
  40 #define VIA_FINISH_PRIM(vmesa) do {             \
  41    if (vmesa->dmaLastPrim)                      \
  42       viaFinishPrimitive( vmesa );              \
  43 } while (0)
  44
  45 #define VIA_FLUSH_DMA(vmesa) do {               \
  46    VIA_FINISH_PRIM(vmesa);                      \
  47    if (vmesa->dmaLow)           \
  48       viaFlushDma(vmesa);                       \
  49 } while (0)
  50
  51
  52 void viaWrapPrimitive( viaContextPtr vmesa );
  53
  54 static __inline__ GLuint *viaAllocDma(viaContextPtr vmesa, int bytes)
  55 {
  56    if (vmesa->dmaLow + bytes > VIA_DMA_HIGHWATER) {
  57       viaFlushDma(vmesa);
  58    }
  59
  60    {
  61       GLuint *start = (GLuint *)(vmesa->dma + vmesa->dmaLow);
  62       vmesa->dmaLow += bytes;
  63       return start;
  64    }
  65 }
  66
  67
  68 static GLuint __inline__ *viaExtendPrimitive(viaContextPtr vmesa, int bytes)
  69 {
  70    if (vmesa->dmaLow + bytes > VIA_DMA_HIGHWATER) {
  71       viaWrapPrimitive(vmesa);
  72    }
  73
  74    {
  75       GLuint *start = (GLuint *)(vmesa->dma + vmesa->dmaLow);
  76       vmesa->dmaLow += bytes;
  77       return start;
  78    }
  79 }
  80
  81
  82
  83
  84 #define RING_VARS GLuint *_vb = 0, _nr, _x;
  85
  86 #define BEGIN_RING(n) do {                              \
  87    if (_vb != 0) abort();                               \
  88    _vb = viaAllocDma(vmesa, (n) * sizeof(GLuint));      \
  89    _nr = (n);                                           \
  90    _x = 0;                                              \
  91 } while (0)
  92
  93 #define BEGIN_RING_NOCHECK(n) do {                      \
  94    if (_vb != 0) abort();                               \
  95    _vb = (GLuint *)(vmesa->dma + vmesa->dmaLow);        \
  96    vmesa->dmaLow += (n) * sizeof(GLuint);               \
  97    _nr = (n);                                           \
  98    _x = 0;                                              \
  99 } while (0)
 100
 101 #define OUT_RING(n) _vb[_x++] = (n)
 102
 103 #define ADVANCE_RING() do {                     \
 104    if (_x != _nr) abort();                      \
 105    _vb = 0;                                             \
 106 } while (0)
 107
 108 #define ADVANCE_RING_VARIABLE() do {                    \
 109    if (_x > _nr) abort();                               \
 110    vmesa->dmaLow -= (_nr - _x) * sizeof(GLuint);        \
 111    _vb = 0;                                             \
 112 } while (0)
 113
 114
 115 #define QWORD_PAD_RING() do {                   \
 116    if (vmesa->dmaLow & 0x4) {                   \
 117       BEGIN_RING(1);                            \
 118       OUT_RING(HC_DUMMY);                       \
 119       ADVANCE_RING();                           \
 120    }                                            \
 121 } while (0)
 122
 123
 124
 125
 126 #endif