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

 * Copyright 2009 VMware, Inc.  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, sublicense, 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 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

 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS

 * 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 "vmw_screen.h"

#include "vmw_buffer.h"

#include "vmw_fence.h"

#include "pipebuffer/pb_buffer.h"

#include "pipebuffer/pb_bufmgr.h"

/*

 * TODO: Have the query pool always ask the fence manager for

 * SVGA_FENCE_FLAG_QUERY signaled. Unfortunately, pb_fenced doesn't

 * support that currently, so we'd have to create a separate

 * pb_fence_ops wrapper that does this implicitly.

 */

/**

 * vmw_pools_cleanup - Destroy the buffer pools.

 *

 * @vws: pointer to a struct vmw_winsys_screen.

 */

void

vmw_pools_cleanup(struct vmw_winsys_screen *vws)

{

   if(vws->pools.gmr_fenced)

      vws->pools.gmr_fenced->destroy(vws->pools.gmr_fenced);

   if (vws->pools.query_fenced)

      vws->pools.query_fenced->destroy(vws->pools.query_fenced);

   /* gmr_mm pool is already destroyed above */

   if (vws->pools.gmr_slab_fenced)

      vws->pools.gmr_slab_fenced->destroy(vws->pools.gmr_slab_fenced);

   if(vws->pools.gmr)

      vws->pools.gmr->destroy(vws->pools.gmr);

   if(vws->pools.query)

      vws->pools.query->destroy(vws->pools.query);

}

/**

 * vmw_query_pools_init - Create a pool of query buffers.

 *

 * @vws: Pointer to a struct vmw_winsys_screen.

 *

 * Typically this pool should be created on demand when we

 * detect that the app will be using queries. There's nothing

 * special with this pool other than the backing kernel buffer size,

 * which is limited to 8192.

 */

boolean

vmw_query_pools_init(struct vmw_winsys_screen *vws)

{

   vws->pools.query = vmw_gmr_bufmgr_create(vws);

   if(!vws->pools.query)

      return FALSE;

   vws->pools.query_mm = mm_bufmgr_create(vws->pools.query,

					  VMW_QUERY_POOL_SIZE,

					  3 /* 8 alignment */);

   if(!vws->pools.query_mm)

      goto out_no_query_mm;

   vws->pools.query_fenced = fenced_bufmgr_create(

      vws->pools.query_mm,

      vmw_fence_ops_create(vws),

      VMW_QUERY_POOL_SIZE,

      ~0);

   if(!vws->pools.query_fenced)

      goto out_no_query_fenced;

   return TRUE;

  out_no_query_fenced:

   vws->pools.query_mm->destroy(vws->pools.query_mm);

  out_no_query_mm:

   vws->pools.query->destroy(vws->pools.query);

   return FALSE;

}

/**

 * vmw_pools_init - Create a pool of GMR buffers.

 *

 * @vws: Pointer to a struct vmw_winsys_screen.

 */

boolean

vmw_pools_init(struct vmw_winsys_screen *vws)

{

   struct pb_desc desc;

   vws->pools.gmr = vmw_gmr_bufmgr_create(vws);

   if(!vws->pools.gmr)

      goto error;

   vws->pools.gmr_mm = mm_bufmgr_create(vws->pools.gmr,

                                        VMW_GMR_POOL_SIZE,

                                        12 /* 4096 alignment */);

   if(!vws->pools.gmr_mm)

      goto error;

   /*

    * We disallow "CPU" buffers to be created by the fenced_bufmgr_create,

    * because that defers "GPU" buffer creation to buffer validation,

    * and at buffer validation we have no means of handling failures

    * due to pools space shortage or fragmentation. Effectively this

    * makes sure all failures are reported immediately on buffer allocation,

    * and we can revert to allocating directly from the kernel.

    */

   vws->pools.gmr_fenced = fenced_bufmgr_create(

      vws->pools.gmr_mm,

      vmw_fence_ops_create(vws),

      VMW_GMR_POOL_SIZE,

      0);

#ifdef DEBUG

   vws->pools.gmr_fenced = pb_debug_manager_create(vws->pools.gmr_fenced,

						   4096,

						   4096);

#endif

   if(!vws->pools.gmr_fenced)

      goto error;

   /*

    * The slab pool allocates buffers directly from the kernel except

    * for very small buffers which are allocated from a slab in order

    * not to waste memory, since a kernel buffer is a minimum 4096 bytes.

    *

    * Here we use it only for emergency in the case our pre-allocated

    * buffer pool runs out of memory.

    */

   desc.alignment = 64;

   desc.usage = ~0;

   vws->pools.gmr_slab = pb_slab_range_manager_create(vws->pools.gmr,

						      64,

						      8192,

						      16384,

						      &desc);

   if (!vws->pools.gmr_slab)

       goto error;

   vws->pools.gmr_slab_fenced =

       fenced_bufmgr_create(vws->pools.gmr_slab,

			    vmw_fence_ops_create(vws),

			    VMW_MAX_BUFFER_SIZE,

			    0);

   if (!vws->pools.gmr_slab_fenced)

       goto error;

   vws->pools.query_fenced = NULL;

   vws->pools.query_mm = NULL;

   vws->pools.query = NULL;

   return TRUE;

error:

   vmw_pools_cleanup(vws);

   return FALSE;

}