IABSD.fr/xenocara/driver/xf86-video-intel/xvmc/intel_batchbuffer.c

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• Author : matthieu
  Date : 2014-02-03 15:54:42
  Hash : f6224eae
  Message : Update to xf86-video-intel 2.99.909 Tested by jsg@, kettenis@ and myself on a wide range of intel cards.

• driver/xf86-video-intel/xvmc/intel_batchbuffer.c

• /**************************************************************************
   *
   * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   * All Rights Reserved.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the
   * "Software"), to deal in the Software without restriction, including
   * without limitation the rights to use, copy, modify, merge, publish,
   * distribute, sub license, and/or sell copies of the Software, and to
   * permit persons to whom the Software is furnished to do so, subject to
   * the following conditions:
   *
   * The above copyright notice and this permission notice (including the
   * next paragraph) shall be included in all copies or substantial portions
   * of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
   * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
   * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
   * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
   * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   *
   **************************************************************************/
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <unistd.h>
  #include <errno.h>
  #include <signal.h>
  #include <fcntl.h>
  #include <dirent.h>
  #include <string.h>
  #include <assert.h>
  
  #include <sys/ioctl.h>
  #include <X11/Xlibint.h>
  #include <fourcc.h>
  #include <X11/extensions/Xv.h>
  #include <X11/extensions/Xvlib.h>
  #include <X11/extensions/XvMC.h>
  #include <X11/extensions/XvMClib.h>
  
  #include "intel_xvmc_private.h"
  #include "intel_batchbuffer.h"
  #include "brw_defines.h"
  #include "brw_structs.h"
  #define MI_BATCH_BUFFER_END     (0xA << 23)
  #define BATCH_SIZE 8*1024	/* one bo is allocated each time, so the size can be small */
  
  static void i965_end_batch(void)
  {
  	unsigned int size = xvmc_driver->batch.ptr -
  	    xvmc_driver->batch.init_ptr;
  	if ((size & 4) == 0) {
  		*(unsigned int *)xvmc_driver->batch.ptr = 0;
  		xvmc_driver->batch.ptr += 4;
  	}
  	*(unsigned int *)xvmc_driver->batch.ptr = MI_BATCH_BUFFER_END;
  	xvmc_driver->batch.ptr += 4;
  }
  
  static void reset_batch(void)
  {
  	dri_bo *bo = xvmc_driver->batch.buf;
  
  	xvmc_driver->batch.ptr = xvmc_driver->batch.init_ptr = bo->virtual;
  	xvmc_driver->batch.size = bo->size;
  	xvmc_driver->batch.space = bo->size - 8;
  }
  
  Bool intelInitBatchBuffer(void)
  {
  	if ((xvmc_driver->batch.buf =
  	     drm_intel_bo_alloc(xvmc_driver->bufmgr,
  				"batch buffer", BATCH_SIZE, 0x1000)) == NULL) {
  		fprintf(stderr, "unable to alloc batch buffer\n");
  		return False;
  	}
  
  	if (drm_intel_gem_bo_map_gtt(xvmc_driver->batch.buf)) {
  		drm_intel_bo_unreference(xvmc_driver->batch.buf);
  		return False;
  	}
  
  	reset_batch();
  	return True;
  }
  
  void intelFiniBatchBuffer(void)
  {
  	if (xvmc_driver->batch.buf == NULL)
  		return;
  
  	drm_intel_bo_unreference(xvmc_driver->batch.buf);
  }
  
  void intelFlushBatch(void)
  {
  	dri_bo *bo;
  
  	i965_end_batch();
  
  	drm_intel_bo_exec(xvmc_driver->batch.buf,
  			  xvmc_driver->batch.ptr - xvmc_driver->batch.init_ptr,
  			  0, 0, 0);
  
  	bo = drm_intel_bo_alloc(xvmc_driver->bufmgr,
  				"batch buffer", BATCH_SIZE, 0x1000);
  	if (bo != NULL && drm_intel_gem_bo_map_gtt(bo) == 0) {
  		drm_intel_bo_unreference(xvmc_driver->batch.buf);
  		xvmc_driver->batch.buf = bo;
  	} else {
  		if (bo != NULL)
  			drm_intel_bo_unreference(bo);
  		drm_intel_gem_bo_map_gtt(xvmc_driver->batch.buf);
  	}
  
  	reset_batch();
  }
  
  void intelBatchbufferData(const void *data, unsigned bytes, unsigned flags)
  {
  	assert(bytes <= xvmc_driver->batch.space);
  	memcpy(xvmc_driver->batch.ptr, data, bytes);
  	xvmc_driver->batch.ptr += bytes;
  	xvmc_driver->batch.space -= bytes;
  }
  
  void intel_batch_emit_reloc(dri_bo * bo, uint32_t read_domain,
  			    uint32_t write_domain, uint32_t delta,
  			    unsigned char *ptr)
  {
  	drm_intel_bo_emit_reloc(xvmc_driver->batch.buf,
  				ptr - xvmc_driver->batch.init_ptr, bo, delta,
  				read_domain, write_domain);
  }