drivers/gpu/drm/virtio/virtgpu_debugfs.c

   1 /*
   2  * Copyright (C) 2015 Red Hat, Inc.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include <linux/debugfs.h>
  27
  28 #include "drmP.h"
  29 #include "virtgpu_drv.h"
  30
  31 static int
  32 virtio_gpu_debugfs_irq_info(struct seq_file *m, void *data)
  33 {
  34         struct drm_info_node *node = (struct drm_info_node *) m->private;
  35         struct virtio_gpu_device *vgdev = node->minor->dev->dev_private;
  36
  37         seq_printf(m, "fence %llu %lld\n",
  38                    (u64)atomic64_read(&vgdev->fence_drv.last_seq),
  39                    vgdev->fence_drv.sync_seq);
  40         return 0;
  41 }
  42
  43 static struct drm_info_list virtio_gpu_debugfs_list[] = {
  44         { "irq_fence", virtio_gpu_debugfs_irq_info, 0, NULL },
  45 };
  46
  47 #define VIRTIO_GPU_DEBUGFS_ENTRIES ARRAY_SIZE(virtio_gpu_debugfs_list)
  48
  49 int
  50 virtio_gpu_debugfs_init(struct drm_minor *minor)
  51 {
  52         drm_debugfs_create_files(virtio_gpu_debugfs_list,
  53                                  VIRTIO_GPU_DEBUGFS_ENTRIES,
  54                                  minor->debugfs_root, minor);
  55         return 0;
  56 }
  57
  58 void
  59 virtio_gpu_debugfs_takedown(struct drm_minor *minor)
  60 {
  61         drm_debugfs_remove_files(virtio_gpu_debugfs_list,
  62                                  VIRTIO_GPU_DEBUGFS_ENTRIES,
  63                                  minor);
  64 }