src/xvmc/intel_batchbuffer.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
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   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <unistd.h>
  31 #include <errno.h>
  32 #include <signal.h>
  33 #include <fcntl.h>
  34 #include <dirent.h>
  35 #include <string.h>
  36 #include <assert.h>
  37
  38 #include <sys/ioctl.h>
  39 #include <X11/Xlibint.h>
  40 #include <fourcc.h>
  41 #include <X11/extensions/Xv.h>
  42 #include <X11/extensions/Xvlib.h>
  43 #include <X11/extensions/XvMC.h>
  44 #include <X11/extensions/XvMClib.h>
  45
  46 #include "intel_xvmc.h"
  47 #include "intel_batchbuffer.h"
  48 #include "brw_defines.h"
  49 #include "brw_structs.h"
  50 #define MI_BATCH_BUFFER_END     (0xA << 23)
  51 #define BATCH_SIZE 8*1024       /* one bo is allocated each time, so the size can be small */
  52
  53 static void i965_end_batch(void)
  54 {
  55         unsigned int size = xvmc_driver->batch.ptr -
  56             xvmc_driver->batch.init_ptr;
  57         if ((size & 4) == 0) {
  58                 *(unsigned int *)xvmc_driver->batch.ptr = 0;
  59                 xvmc_driver->batch.ptr += 4;
  60         }
  61         *(unsigned int *)xvmc_driver->batch.ptr = MI_BATCH_BUFFER_END;
  62         xvmc_driver->batch.ptr += 4;
  63 }
  64
  65 Bool intelInitBatchBuffer(void)
  66 {
  67         if ((xvmc_driver->batch.buf =
  68              drm_intel_bo_alloc(xvmc_driver->bufmgr,
  69                                 "batch buffer", BATCH_SIZE, 0x1000)) == NULL) {
  70                 fprintf(stderr, "unable to alloc batch buffer\n");
  71                 return False;
  72         }
  73
  74         drm_intel_gem_bo_map_gtt(xvmc_driver->batch.buf);
  75
  76         xvmc_driver->batch.init_ptr = xvmc_driver->batch.buf->virtual;
  77         xvmc_driver->batch.size = BATCH_SIZE;
  78         xvmc_driver->batch.space = BATCH_SIZE;
  79         xvmc_driver->batch.ptr = xvmc_driver->batch.init_ptr;
  80         return True;
  81 }
  82
  83 void intelFiniBatchBuffer(void)
  84 {
  85         drm_intel_gem_bo_unmap_gtt(xvmc_driver->batch.buf);
  86
  87         drm_intel_bo_unreference(xvmc_driver->batch.buf);
  88 }
  89
  90 void intelFlushBatch(Bool refill)
  91 {
  92         i965_end_batch();
  93
  94         drm_intel_gem_bo_unmap_gtt(xvmc_driver->batch.buf);
  95
  96         drm_intel_bo_exec(xvmc_driver->batch.buf,
  97                           xvmc_driver->batch.ptr - xvmc_driver->batch.init_ptr,
  98                           0, 0, 0);
  99
 100         drm_intel_bo_unreference(xvmc_driver->batch.buf);
 101         if ((xvmc_driver->batch.buf =
 102              drm_intel_bo_alloc(xvmc_driver->bufmgr,
 103                                 "batch buffer", BATCH_SIZE, 0x1000)) == NULL) {
 104                 fprintf(stderr, "unable to alloc batch buffer\n");
 105         }
 106
 107         drm_intel_gem_bo_map_gtt(xvmc_driver->batch.buf);
 108
 109         xvmc_driver->batch.init_ptr = xvmc_driver->batch.buf->virtual;
 110         xvmc_driver->batch.size = BATCH_SIZE;
 111         xvmc_driver->batch.space = BATCH_SIZE;
 112         xvmc_driver->batch.ptr = xvmc_driver->batch.init_ptr;
 113 }
 114
 115 void intelBatchbufferRequireSpace(int size)
 116 {
 117         assert(xvmc_driver->batch.ptr - xvmc_driver->batch.init_ptr + size <
 118                xvmc_driver->batch.size - 8);
 119         if (xvmc_driver->batch.ptr - xvmc_driver->batch.init_ptr + size
 120             >= xvmc_driver->batch.size - 8)
 121                 intelFlushBatch(1);
 122 }
 123
 124 void intelBatchbufferData(const void *data, unsigned bytes, unsigned flags)
 125 {
 126         intelBatchbufferRequireSpace(bytes);
 127         memcpy(xvmc_driver->batch.ptr, data, bytes);
 128         xvmc_driver->batch.ptr += bytes;
 129         xvmc_driver->batch.space -= bytes;
 130 }
 131
 132 void intel_batch_emit_reloc(dri_bo * bo, uint32_t read_domain,
 133                             uint32_t write_domain, uint32_t delta,
 134                             unsigned char *ptr)
 135 {
 136         drm_intel_bo_emit_reloc(xvmc_driver->batch.buf,
 137                                 ptr - xvmc_driver->batch.init_ptr, bo, delta,
 138                                 read_domain, write_domain);
 139 }