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/**************************************************************************

 *

 * Copyright 2006 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 "intel_context.h"

#include "intel_batchbuffer.h"

#include "intel_buffer_objects.h"

#include "intel_reg.h"

#include "intel_bufmgr.h"

#include "intel_buffers.h"

static void

intel_batchbuffer_reset(struct intel_context *intel);

void

intel_batchbuffer_init(struct intel_context *intel)

{

   intel_batchbuffer_reset(intel);

   intel->batch.cpu_map = malloc(intel->maxBatchSize);

   intel->batch.map = intel->batch.cpu_map;

}

static void

intel_batchbuffer_reset(struct intel_context *intel)

{

   if (intel->batch.last_bo != NULL) {

      drm_intel_bo_unreference(intel->batch.last_bo);

      intel->batch.last_bo = NULL;

   }

   intel->batch.last_bo = intel->batch.bo;

   intel->batch.bo = drm_intel_bo_alloc(intel->bufmgr, "batchbuffer",

					intel->maxBatchSize, 4096);

   intel->batch.reserved_space = BATCH_RESERVED;

   intel->batch.used = 0;

}

void

intel_batchbuffer_free(struct intel_context *intel)

{

   free(intel->batch.cpu_map);

   drm_intel_bo_unreference(intel->batch.last_bo);

   drm_intel_bo_unreference(intel->batch.bo);

}

static void

do_batch_dump(struct intel_context *intel)

{

   struct drm_intel_decode *decode;

   struct intel_batchbuffer *batch = &intel->batch;

   int ret;

   decode = drm_intel_decode_context_alloc(intel->intelScreen->deviceID);

   if (!decode)

      return;

   ret = drm_intel_bo_map(batch->bo, false);

   if (ret == 0) {

      drm_intel_decode_set_batch_pointer(decode,

					 batch->bo->virtual,

					 batch->bo->offset,

					 batch->used);

   } else {

      fprintf(stderr,

	      "WARNING: failed to map batchbuffer (%s), "

	      "dumping uploaded data instead.\n", strerror(ret));

      drm_intel_decode_set_batch_pointer(decode,

					 batch->map,

					 batch->bo->offset,

					 batch->used);

   }

   drm_intel_decode(decode);

   drm_intel_decode_context_free(decode);

   if (ret == 0) {

      drm_intel_bo_unmap(batch->bo);

      if (intel->vtbl.debug_batch != NULL)

	 intel->vtbl.debug_batch(intel);

   }

}

/* TODO: Push this whole function into bufmgr.

 */

static int

do_flush_locked(struct intel_context *intel)

{

   struct intel_batchbuffer *batch = &intel->batch;

   int ret = 0;

   ret = drm_intel_bo_subdata(batch->bo, 0, 4*batch->used, batch->map);

   if (!intel->intelScreen->no_hw) {

      if (ret == 0) {

         if (unlikely(INTEL_DEBUG & DEBUG_AUB) && intel->vtbl.annotate_aub)

            intel->vtbl.annotate_aub(intel);

         ret = drm_intel_bo_mrb_exec(batch->bo, 4 * batch->used, NULL, 0, 0,

                                     I915_EXEC_RENDER);

      }

   }

   if (unlikely(INTEL_DEBUG & DEBUG_BATCH))

      do_batch_dump(intel);

   if (ret != 0) {

      fprintf(stderr, "intel_do_flush_locked failed: %s\n", strerror(-ret));

      exit(1);

   }

   intel->vtbl.new_batch(intel);

   return ret;

}

int

_intel_batchbuffer_flush(struct intel_context *intel,

			 const char *file, int line)

{

   int ret;

   if (intel->batch.used == 0)

      return 0;

   if (intel->first_post_swapbuffers_batch == NULL) {

      intel->first_post_swapbuffers_batch = intel->batch.bo;

      drm_intel_bo_reference(intel->first_post_swapbuffers_batch);

   }

   if (unlikely(INTEL_DEBUG & DEBUG_BATCH))

      fprintf(stderr, "%s:%d: Batchbuffer flush with %db used\n", file, line,

	      4*intel->batch.used);

   intel->batch.reserved_space = 0;

   if (intel->vtbl.finish_batch)

      intel->vtbl.finish_batch(intel);

   /* Mark the end of the buffer. */

   intel_batchbuffer_emit_dword(intel, MI_BATCH_BUFFER_END);

   if (intel->batch.used & 1) {

      /* Round batchbuffer usage to 2 DWORDs. */

      intel_batchbuffer_emit_dword(intel, MI_NOOP);

   }

   intel_upload_finish(intel);

   /* Check that we didn't just wrap our batchbuffer at a bad time. */

   assert(!intel->no_batch_wrap);

   ret = do_flush_locked(intel);

   if (unlikely(INTEL_DEBUG & DEBUG_SYNC)) {

      fprintf(stderr, "waiting for idle\n");

      drm_intel_bo_wait_rendering(intel->batch.bo);

   }

   /* Reset the buffer:

    */

   intel_batchbuffer_reset(intel);

   return ret;

}

/*  This is the only way buffers get added to the validate list.

 */

bool

intel_batchbuffer_emit_reloc(struct intel_context *intel,

                             drm_intel_bo *buffer,

                             uint32_t read_domains, uint32_t write_domain,

			     uint32_t delta)

{

   int ret;

   ret = drm_intel_bo_emit_reloc(intel->batch.bo, 4*intel->batch.used,

				 buffer, delta,

				 read_domains, write_domain);

   assert(ret == 0);

   (void)ret;

   /*

    * Using the old buffer offset, write in what the right data would be, in case

    * the buffer doesn't move and we can short-circuit the relocation processing

    * in the kernel

    */

   intel_batchbuffer_emit_dword(intel, buffer->offset + delta);

   return true;

}

bool

intel_batchbuffer_emit_reloc_fenced(struct intel_context *intel,

				    drm_intel_bo *buffer,

				    uint32_t read_domains,

				    uint32_t write_domain,

				    uint32_t delta)

{

   int ret;

   ret = drm_intel_bo_emit_reloc_fence(intel->batch.bo, 4*intel->batch.used,

				       buffer, delta,

				       read_domains, write_domain);

   assert(ret == 0);

   (void)ret;

   /*

    * Using the old buffer offset, write in what the right data would

    * be, in case the buffer doesn't move and we can short-circuit the

    * relocation processing in the kernel

    */

   intel_batchbuffer_emit_dword(intel, buffer->offset + delta);

   return true;

}

void

intel_batchbuffer_data(struct intel_context *intel,

                       const void *data, GLuint bytes)

{

   assert((bytes & 3) == 0);

   intel_batchbuffer_require_space(intel, bytes);

   __memcpy(intel->batch.map + intel->batch.used, data, bytes);

   intel->batch.used += bytes >> 2;

}

/* Emit a pipelined flush to either flush render and texture cache for

 * reading from a FBO-drawn texture, or flush so that frontbuffer

 * render appears on the screen in DRI1.

 *

 * This is also used for the always_flush_cache driconf debug option.

 */

void

intel_batchbuffer_emit_mi_flush(struct intel_context *intel)

{

   BEGIN_BATCH(1);

   OUT_BATCH(MI_FLUSH);

   ADVANCE_BATCH();

}