From 41d939b210865e7ba3469916844e684665e31521 Mon Sep 17 00:00:00 2001 From: Dave Stevenson Date: Fri, 27 Oct 2023 16:46:04 +0100 Subject: [PATCH 0711/1085] drm/vc4: Add hvs_dlist_allocs debugfs function. Users are reporting running out of DLIST memory. Add a debugfs file to dump out all the allocations. Signed-off-by: Dave Stevenson --- drivers/gpu/drm/vc4/vc4_hvs.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) --- a/drivers/gpu/drm/vc4/vc4_hvs.c +++ b/drivers/gpu/drm/vc4/vc4_hvs.c @@ -347,6 +347,36 @@ static int vc5_hvs_debugfs_gamma(struct return 0; } +static int vc4_hvs_debugfs_dlist_allocs(struct seq_file *m, void *data) +{ + struct drm_info_node *node = m->private; + struct drm_device *dev = node->minor->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. */ @@ -1551,6 +1581,8 @@ int vc4_hvs_debugfs_init(struct drm_mino 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;