target/linux/bcm27xx/patches-6.1/950-1070-drm-vc4-Add-hvs_dlist_allocs-debugfs-function.patch

   1 From 665e9810340abc37769b317445907bac1843dd64 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Fri, 27 Oct 2023 16:46:04 +0100
   4 Subject: [PATCH] drm/vc4: Add hvs_dlist_allocs debugfs function.
   5
   6 Users are reporting running out of DLIST memory. Add a
   7 debugfs file to dump out all the allocations.
   8
   9 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  10 ---
  11  drivers/gpu/drm/vc4/vc4_hvs.c | 35 +++++++++++++++++++++++++++++++++++
  12  1 file changed, 35 insertions(+)
  13
  14 --- a/drivers/gpu/drm/vc4/vc4_hvs.c
  15 +++ b/drivers/gpu/drm/vc4/vc4_hvs.c
  16 @@ -347,6 +347,36 @@ static int vc5_hvs_debugfs_gamma(struct
  17         return 0;
  18  }
  19
  20 +static int vc4_hvs_debugfs_dlist_allocs(struct seq_file *m, void *data)
  21 +{
  22 +       struct drm_info_node *node = m->private;
  23 +       struct drm_device *dev = node->minor->dev;
  24 +       struct vc4_dev *vc4 = to_vc4_dev(dev);
  25 +       struct vc4_hvs *hvs = vc4->hvs;
  26 +       struct drm_printer p = drm_seq_file_printer(m);
  27 +       struct vc4_hvs_dlist_allocation *cur, *next;
  28 +       struct drm_mm_node *mm_node;
  29 +       unsigned long flags;
  30 +
  31 +       spin_lock_irqsave(&hvs->mm_lock, flags);
  32 +
  33 +       drm_printf(&p, "Allocated nodes:\n");
  34 +       list_for_each_entry(mm_node, drm_mm_nodes(&hvs->dlist_mm), node_list) {
  35 +               drm_printf(&p, "node [%08llx + %08llx]\n", mm_node->start, mm_node->size);
  36 +       }
  37 +
  38 +       drm_printf(&p, "Stale nodes:\n");
  39 +       list_for_each_entry_safe(cur, next, &hvs->stale_dlist_entries, node) {
  40 +               drm_printf(&p, "node [%08llx + %08llx] channel %u frcnt %u\n",
  41 +                          cur->mm_node.start, cur->mm_node.size, cur->channel,
  42 +                          cur->target_frame_count);
  43 +       }
  44 +
  45 +       spin_unlock_irqrestore(&hvs->mm_lock, flags);
  46 +
  47 +       return 0;
  48 +}
  49 +
  50  /* The filter kernel is composed of dwords each containing 3 9-bit
  51   * signed integers packed next to each other.
  52   */
  53 @@ -1602,6 +1632,11 @@ int vc4_hvs_debugfs_init(struct drm_mino
  54         if (ret)
  55                 return ret;
  56
  57 +       ret = vc4_debugfs_add_file(minor, "hvs_dlist_allocs",
  58 +                                  vc4_hvs_debugfs_dlist_allocs, NULL);
  59 +       if (ret)
  60 +               return ret;
  61 +
  62         ret = vc4_debugfs_add_regset32(minor, "hvs_regs",
  63                                        &hvs->regset);
  64         if (ret)