drivers/gpu/drm/v3d/v3d_fence.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /* Copyright (C) 2017-2018 Broadcom */
   3
   4 #include "v3d_drv.h"
   5
   6 struct dma_fence *v3d_fence_create(struct v3d_dev *v3d, enum v3d_queue queue)
   7 {
   8         struct v3d_fence *fence;
   9
  10         fence = kzalloc(sizeof(*fence), GFP_KERNEL);
  11         if (!fence)
  12                 return ERR_PTR(-ENOMEM);
  13
  14         fence->dev = &v3d->drm;
  15         fence->queue = queue;
  16         fence->seqno = ++v3d->queue[queue].emit_seqno;
  17         dma_fence_init(&fence->base, &v3d_fence_ops, &v3d->job_lock,
  18                        v3d->queue[queue].fence_context, fence->seqno);
  19
  20         return &fence->base;
  21 }
  22
  23 static const char *v3d_fence_get_driver_name(struct dma_fence *fence)
  24 {
  25         return "v3d";
  26 }
  27
  28 static const char *v3d_fence_get_timeline_name(struct dma_fence *fence)
  29 {
  30         struct v3d_fence *f = to_v3d_fence(fence);
  31
  32         if (f->queue == V3D_BIN)
  33                 return "v3d-bin";
  34         else
  35                 return "v3d-render";
  36 }
  37
  38 static bool v3d_fence_enable_signaling(struct dma_fence *fence)
  39 {
  40         return true;
  41 }
  42
  43 static bool v3d_fence_signaled(struct dma_fence *fence)
  44 {
  45         struct v3d_fence *f = to_v3d_fence(fence);
  46         struct v3d_dev *v3d = to_v3d_dev(f->dev);
  47
  48         return v3d->queue[f->queue].finished_seqno >= f->seqno;
  49 }
  50
  51 const struct dma_fence_ops v3d_fence_ops = {
  52         .get_driver_name = v3d_fence_get_driver_name,
  53         .get_timeline_name = v3d_fence_get_timeline_name,
  54         .enable_signaling = v3d_fence_enable_signaling,
  55         .signaled = v3d_fence_signaled,
  56         .wait = dma_fence_default_wait,
  57         .release = dma_fence_free,
  58 };