drivers/gpu/drm/msm/msm_fence.h

   1 /*
   2  * Copyright (C) 2013-2016 Red Hat
   3  * Author: Rob Clark <robdclark@gmail.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published by
   7  * the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef __MSM_FENCE_H__
  19 #define __MSM_FENCE_H__
  20
  21 #include "msm_drv.h"
  22
  23 struct msm_fence_context {
  24         struct drm_device *dev;
  25         char name[32];
  26         unsigned context;
  27         /* last_fence == completed_fence --> no pending work */
  28         uint32_t last_fence;          /* last assigned fence */
  29         uint32_t completed_fence;     /* last completed fence */
  30         wait_queue_head_t event;
  31         spinlock_t spinlock;
  32 };
  33
  34 struct msm_fence_context * msm_fence_context_alloc(struct drm_device *dev,
  35                 const char *name);
  36 void msm_fence_context_free(struct msm_fence_context *fctx);
  37
  38 int msm_wait_fence(struct msm_fence_context *fctx, uint32_t fence,
  39                 ktime_t *timeout, bool interruptible);
  40 void msm_update_fence(struct msm_fence_context *fctx, uint32_t fence);
  41
  42 struct dma_fence * msm_fence_alloc(struct msm_fence_context *fctx);
  43
  44 #endif