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(struct via_context *vmesa);
  32 void viaFlushDma(struct via_context *vmesa);
  33 void viaFlushDmaLocked(struct via_context *vmesa, GLuint flags);
  34
  35 void viaInitIoctlFuncs(GLcontext *ctx);
  36 void viaCopyBuffer(__DRIdrawable *dpriv);
  37 void viaPageFlip(__DRIdrawable *dpriv);
  38 void viaCheckDma(struct via_context *vmesa, GLuint bytes);
  39 void viaResetPageFlippingLocked(struct via_context *vmesa);
  40 void viaWaitIdle(struct via_context *vmesa, GLboolean light);
  41 void viaWaitIdleLocked(struct via_context *vmesa, GLboolean light);
  42
  43 GLboolean viaCheckBreadcrumb( struct via_context *vmesa, GLuint value );
  44 void viaEmitBreadcrumb( struct via_context *vmesa );
  45
  46
  47 #define VIA_FINISH_PRIM(vmesa) do {             \
  48    if (vmesa->dmaLastPrim)                      \
  49       viaFinishPrimitive( vmesa );              \
  50 } while (0)
  51
  52 #define VIA_FLUSH_DMA(vmesa) do {               \
  53    VIA_FINISH_PRIM(vmesa);                      \
  54    if (vmesa->dmaLow)           \
  55       viaFlushDma(vmesa);                       \
  56 } while (0)
  57
  58
  59 void viaWrapPrimitive( struct via_context *vmesa );
  60
  61 static INLINE GLuint *viaAllocDma(struct via_context *vmesa, int bytes)
  62 {
  63    if (vmesa->dmaLow + bytes > VIA_DMA_HIGHWATER) {
  64       viaFlushDma(vmesa);
  65    }
  66
  67    {
  68       GLuint *start = (GLuint *)(vmesa->dma + vmesa->dmaLow);
  69       vmesa->dmaLow += bytes;
  70       return start;
  71    }
  72 }
  73
  74
  75 static GLuint INLINE *viaExtendPrimitive(struct via_context *vmesa, int bytes)
  76 {
  77    if (vmesa->dmaLow + bytes > VIA_DMA_HIGHWATER) {
  78       viaWrapPrimitive(vmesa);
  79    }
  80
  81    {
  82       GLuint *start = (GLuint *)(vmesa->dma + vmesa->dmaLow);
  83       vmesa->dmaLow += bytes;
  84       return start;
  85    }
  86 }
  87
  88
  89
  90
  91 #define RING_VARS GLuint *_vb = 0, _nr, _x;
  92
  93 #define BEGIN_RING(n) do {                              \
  94    if (_vb != 0) abort();                               \
  95    _vb = viaAllocDma(vmesa, (n) * sizeof(GLuint));      \
  96    _nr = (n);                                           \
  97    _x = 0;                                              \
  98 } while (0)
  99
 100 #define BEGIN_RING_NOCHECK(n) do {                      \
 101    if (_vb != 0) abort();                               \
 102    _vb = (GLuint *)(vmesa->dma + vmesa->dmaLow);        \
 103    vmesa->dmaLow += (n) * sizeof(GLuint);               \
 104    _nr = (n);                                           \
 105    _x = 0;                                              \
 106 } while (0)
 107
 108 #define OUT_RING(n) _vb[_x++] = (n)
 109
 110 #define ADVANCE_RING() do {                     \
 111    if (_x != _nr) abort();                      \
 112    _vb = 0;                                             \
 113 } while (0)
 114
 115 #define ADVANCE_RING_VARIABLE() do {                    \
 116    if (_x > _nr) abort();                               \
 117    vmesa->dmaLow -= (_nr - _x) * sizeof(GLuint);        \
 118    _vb = 0;                                             \
 119 } while (0)
 120
 121
 122 #define QWORD_PAD_RING() do {                   \
 123    if (vmesa->dmaLow & 0x4) {                   \
 124       BEGIN_RING(1);                            \
 125       OUT_RING(HC_DUMMY);                       \
 126       ADVANCE_RING();                           \
 127    }                                            \
 128 } while (0)
 129
 130 #define VIA_GEQ_WRAP(left, right) \
 131     (((left) - (right)) < ( 1 << 23))
 132
 133 #endif