usr/src/uts/common/io/drm/drm_cache.c

   1 /*
   2  *
   3  * Copyright(c) 2006-2007 Tungsten Graphics, Inc., Cedar Park, TX., USA
   4  * Copyright (c) 2009, Intel Corporation.
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files(the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice(including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  22  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  23  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  24  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  25  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  */
  28 /*
  29  * Authors: Thomas HellstrÃ¶m <thomas-at-tungstengraphics-dot-com>
  30  */
  31
  32 /*
  33  * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
  34  */
  35
  36 #include <sys/x86_archext.h>
  37 #include <vm/seg_kmem.h>
  38 #include "drmP.h"
  39
  40 extern void clflush_insn(caddr_t addr);
  41 extern void mfence_insn(void);
  42
  43 static void
  44 drm_clflush_page(caddr_t page)
  45 {
  46         unsigned int i;
  47
  48         if (page == NULL)
  49                 return;
  50
  51         for (i = 0; i < PAGE_SIZE; i += x86_clflush_size)
  52                 clflush_insn(page + i);
  53         mfence_insn();
  54 }
  55
  56 void
  57 drm_clflush_pages(caddr_t *pages, unsigned long num_pages)
  58 {
  59
  60         if (is_x86_feature(x86_featureset, X86FSET_CLFSH)) {
  61                 unsigned long i;
  62
  63                 for (i = 0; i < num_pages; i++)
  64                         drm_clflush_page(pages[i]);
  65         }
  66 }