arch/powerpc/platforms/cell/spu_notify.c

   1 /*
   2  * Move OProfile dependencies from spufs module to the kernel so it
   3  * can run on non-cell PPC.
   4  *
   5  * Copyright (C) IBM 2005
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #undef DEBUG
  23
  24 #include <linux/export.h>
  25 #include <linux/notifier.h>
  26 #include <asm/spu.h>
  27 #include "spufs/spufs.h"
  28
  29 static BLOCKING_NOTIFIER_HEAD(spu_switch_notifier);
  30
  31 void spu_switch_notify(struct spu *spu, struct spu_context *ctx)
  32 {
  33         blocking_notifier_call_chain(&spu_switch_notifier,
  34                                      ctx ? ctx->object_id : 0, spu);
  35 }
  36 EXPORT_SYMBOL_GPL(spu_switch_notify);
  37
  38 int spu_switch_event_register(struct notifier_block *n)
  39 {
  40         int ret;
  41         ret = blocking_notifier_chain_register(&spu_switch_notifier, n);
  42         if (!ret)
  43                 notify_spus_active();
  44         return ret;
  45 }
  46 EXPORT_SYMBOL_GPL(spu_switch_event_register);
  47
  48 int spu_switch_event_unregister(struct notifier_block *n)
  49 {
  50         return blocking_notifier_chain_unregister(&spu_switch_notifier, n);
  51 }
  52 EXPORT_SYMBOL_GPL(spu_switch_event_unregister);
  53
  54 void spu_set_profile_private_kref(struct spu_context *ctx,
  55                                   struct kref *prof_info_kref,
  56                                   void (* prof_info_release) (struct kref *kref))
  57 {
  58         ctx->prof_priv_kref = prof_info_kref;
  59         ctx->prof_priv_release = prof_info_release;
  60 }
  61 EXPORT_SYMBOL_GPL(spu_set_profile_private_kref);
  62
  63 void *spu_get_profile_private_kref(struct spu_context *ctx)
  64 {
  65         return ctx->prof_priv_kref;
  66 }
  67 EXPORT_SYMBOL_GPL(spu_get_profile_private_kref);
  68