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drm/vc4: Add hvs_dlist_allocs debugfs function.

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Users are reporting running out of DLIST memory. Add a
debugfs file to dump out all the allocations.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
This commit is contained in:
Dave Stevenson
2023-10-27 16:46:04 +01:00
committed by Dom Cobley
parent 1102c671f7
commit 8d8c6c02dd
1 changed files with 32 additions and 0 deletions
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32
drivers/gpu/drm/vc4/vc4_hvs.c
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@@ -349,6 +349,36 @@ static int vc6_hvs_debugfs_upm_allocs(struct seq_file *m, void *data)
return 0;
}
static int vc4_hvs_debugfs_dlist_allocs(struct seq_file *m, void *data)
{
struct drm_debugfs_entry *entry = m->private;
struct drm_device *dev = entry->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct vc4_hvs *hvs = vc4->hvs;
struct drm_printer p = drm_seq_file_printer(m);
struct vc4_hvs_dlist_allocation *cur, *next;
struct drm_mm_node *mm_node;
unsigned long flags;
spin_lock_irqsave(&hvs->mm_lock, flags);
drm_printf(&p, "Allocated nodes:\n");
list_for_each_entry(mm_node, drm_mm_nodes(&hvs->dlist_mm), node_list) {
drm_printf(&p, "node [%08llx + %08llx]\n", mm_node->start, mm_node->size);
}
drm_printf(&p, "Stale nodes:\n");
list_for_each_entry_safe(cur, next, &hvs->stale_dlist_entries, node) {
drm_printf(&p, "node [%08llx + %08llx] channel %u frcnt %u\n",
cur->mm_node.start, cur->mm_node.size, cur->channel,
cur->target_frame_count);
}
spin_unlock_irqrestore(&hvs->mm_lock, flags);
return 0;
}
/* The filter kernel is composed of dwords each containing 3 9-bit
* signed integers packed next to each other.
*/
@@ -1478,6 +1508,8 @@ int vc4_hvs_debugfs_init(struct drm_minor *minor)
drm_debugfs_add_file(drm, "hvs_underrun", vc4_hvs_debugfs_underrun, NULL);
drm_debugfs_add_file(drm, "hvs_dlist_allocs", vc4_hvs_debugfs_dlist_allocs, NULL);
vc4_debugfs_add_regset32(drm, "hvs_regs", &hvs->regset);
return 0;