src/gallium/winsys/drm/vmware/core/vmw_screen_pools.c

   1 /**********************************************************
   2  * Copyright 2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26
  27 #include "vmw_screen.h"
  28
  29 #include "vmw_buffer.h"
  30 #include "vmw_fence.h"
  31
  32 #include "pipebuffer/pb_buffer.h"
  33 #include "pipebuffer/pb_bufmgr.h"
  34
  35 void
  36 vmw_pools_cleanup(struct vmw_winsys_screen *vws)
  37 {
  38    if(vws->pools.gmr_fenced)
  39       vws->pools.gmr_fenced->destroy(vws->pools.gmr_fenced);
  40
  41    /* gmr_mm pool is already destroyed above */
  42
  43    if(vws->pools.gmr)
  44       vws->pools.gmr->destroy(vws->pools.gmr);
  45 }
  46
  47
  48 boolean
  49 vmw_pools_init(struct vmw_winsys_screen *vws)
  50 {
  51    vws->pools.gmr = vmw_gmr_bufmgr_create(vws);
  52    if(!vws->pools.gmr)
  53       goto error;
  54
  55    vws->pools.gmr_mm = mm_bufmgr_create(vws->pools.gmr,
  56                                         VMW_GMR_POOL_SIZE,
  57                                         12 /* 4096 alignment */);
  58    if(!vws->pools.gmr_mm)
  59       goto error;
  60
  61    /*
  62     * GMR buffers are typically shortlived, but it's possible that at a given
  63     * instance a buffer is mapped. So to avoid stalling we tell pipebuffer to
  64     * forbid creation of buffers beyond half the GMR pool size,
  65     *
  66     * XXX: It is unclear weather we want to limit the total amount of temporary
  67     * malloc memory used to backup unvalidated GMR buffers. On one hand it is
  68     * preferrable to fail an allocation than exhausting the guest memory with
  69     * temporary data, but on the other hand it is possible that a stupid
  70     * application creates large vertex buffers and does not use them for a long
  71     * time -- since the svga pipe driver only emits the DMA uploads when a
  72     * buffer is used for drawing this would effectively disabling swapping GMR
  73     * buffers to memory. So far, the preemptively flush already seems to keep
  74     * total allocated memory within relatively small numbers, so we don't
  75     * limit.
  76     */
  77    vws->pools.gmr_fenced = fenced_bufmgr_create(
  78       vws->pools.gmr_mm,
  79       vmw_fence_ops_create(vws),
  80       VMW_GMR_POOL_SIZE/2,
  81       ~0);
  82
  83 #ifdef DEBUG
  84    vws->pools.gmr_fenced = pb_debug_manager_create(vws->pools.gmr_fenced,
  85                                                    4096,
  86                                                    4096);
  87 #endif
  88    if(!vws->pools.gmr_fenced)
  89       goto error;
  90
  91    return TRUE;
  92
  93 error:
  94    vmw_pools_cleanup(vws);
  95    return FALSE;
  96 }
  97