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drm: Compile time enabling for asserts in drm_mm
Use CONFIG_DRM_DEBUG_MM to conditionally enable the internal and validation checking using BUG_ON. Ideally these paths should all be exercised by CI selftests (with the asserts enabled). Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20161222083641.2691-4-chris@chris-wilson.co.uk Link: http://patchwork.freedesktop.org/patch/msgid/20161222083641.2691-4-chris@chris-wilson.co.uk
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2bc98c8651
commit
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2 changed files with 30 additions and 23 deletions
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@ -237,7 +237,7 @@ static void drm_mm_insert_helper(struct drm_mm_node *hole_node,
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u64 adj_start = hole_start;
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u64 adj_end = hole_end;
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BUG_ON(node->allocated);
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DRM_MM_BUG_ON(node->allocated);
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if (mm->color_adjust)
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mm->color_adjust(hole_node, color, &adj_start, &adj_end);
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@ -258,8 +258,8 @@ static void drm_mm_insert_helper(struct drm_mm_node *hole_node,
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}
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}
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BUG_ON(adj_start < hole_start);
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BUG_ON(adj_end > hole_end);
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DRM_MM_BUG_ON(adj_start < hole_start);
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DRM_MM_BUG_ON(adj_end > hole_end);
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if (adj_start == hole_start) {
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hole_node->hole_follows = 0;
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@ -276,7 +276,7 @@ static void drm_mm_insert_helper(struct drm_mm_node *hole_node,
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drm_mm_interval_tree_add_node(hole_node, node);
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BUG_ON(node->start + node->size > adj_end);
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DRM_MM_BUG_ON(node->start + node->size > adj_end);
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node->hole_follows = 0;
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if (__drm_mm_hole_node_start(node) < hole_end) {
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@ -409,7 +409,7 @@ static void drm_mm_insert_helper_range(struct drm_mm_node *hole_node,
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u64 adj_start = hole_start;
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u64 adj_end = hole_end;
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BUG_ON(!hole_node->hole_follows || node->allocated);
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DRM_MM_BUG_ON(!hole_node->hole_follows || node->allocated);
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if (adj_start < start)
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adj_start = start;
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@ -450,10 +450,10 @@ static void drm_mm_insert_helper_range(struct drm_mm_node *hole_node,
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drm_mm_interval_tree_add_node(hole_node, node);
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BUG_ON(node->start < start);
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BUG_ON(node->start < adj_start);
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BUG_ON(node->start + node->size > adj_end);
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BUG_ON(node->start + node->size > end);
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DRM_MM_BUG_ON(node->start < start);
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DRM_MM_BUG_ON(node->start < adj_start);
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DRM_MM_BUG_ON(node->start + node->size > adj_end);
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DRM_MM_BUG_ON(node->start + node->size > end);
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node->hole_follows = 0;
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if (__drm_mm_hole_node_start(node) < hole_end) {
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@ -519,22 +519,21 @@ void drm_mm_remove_node(struct drm_mm_node *node)
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struct drm_mm *mm = node->mm;
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struct drm_mm_node *prev_node;
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if (WARN_ON(!node->allocated))
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return;
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BUG_ON(node->scanned_block || node->scanned_prev_free
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|| node->scanned_next_free);
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DRM_MM_BUG_ON(!node->allocated);
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DRM_MM_BUG_ON(node->scanned_block ||
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node->scanned_prev_free ||
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node->scanned_next_free);
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prev_node =
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list_entry(node->node_list.prev, struct drm_mm_node, node_list);
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if (node->hole_follows) {
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BUG_ON(__drm_mm_hole_node_start(node) ==
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__drm_mm_hole_node_end(node));
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DRM_MM_BUG_ON(__drm_mm_hole_node_start(node) ==
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__drm_mm_hole_node_end(node));
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list_del(&node->hole_stack);
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} else
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BUG_ON(__drm_mm_hole_node_start(node) !=
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__drm_mm_hole_node_end(node));
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DRM_MM_BUG_ON(__drm_mm_hole_node_start(node) !=
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__drm_mm_hole_node_end(node));
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if (!prev_node->hole_follows) {
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@ -578,7 +577,7 @@ static struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm,
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u64 adj_end;
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u64 best_size;
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BUG_ON(mm->scanned_blocks);
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DRM_MM_BUG_ON(mm->scanned_blocks);
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best = NULL;
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best_size = ~0UL;
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@ -622,7 +621,7 @@ static struct drm_mm_node *drm_mm_search_free_in_range_generic(const struct drm_
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u64 adj_end;
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u64 best_size;
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BUG_ON(mm->scanned_blocks);
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DRM_MM_BUG_ON(mm->scanned_blocks);
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best = NULL;
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best_size = ~0UL;
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@ -668,6 +667,8 @@ static struct drm_mm_node *drm_mm_search_free_in_range_generic(const struct drm_
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*/
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void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new)
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{
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DRM_MM_BUG_ON(!old->allocated);
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list_replace(&old->node_list, &new->node_list);
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list_replace(&old->hole_stack, &new->hole_stack);
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rb_replace_node(&old->rb, &new->rb, &old->mm->interval_tree);
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@ -798,7 +799,7 @@ bool drm_mm_scan_add_block(struct drm_mm_node *node)
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mm->scanned_blocks++;
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BUG_ON(node->scanned_block);
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DRM_MM_BUG_ON(node->scanned_block);
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node->scanned_block = 1;
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prev_node = list_entry(node->node_list.prev, struct drm_mm_node,
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@ -859,7 +860,7 @@ bool drm_mm_scan_remove_block(struct drm_mm_node *node)
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mm->scanned_blocks--;
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BUG_ON(!node->scanned_block);
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DRM_MM_BUG_ON(!node->scanned_block);
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node->scanned_block = 0;
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prev_node = list_entry(node->node_list.prev, struct drm_mm_node,
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@ -48,6 +48,12 @@
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#include <linux/stackdepot.h>
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#endif
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#ifdef CONFIG_DRM_DEBUG_MM
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#define DRM_MM_BUG_ON(expr) BUG_ON(expr)
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#else
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#define DRM_MM_BUG_ON(expr) BUILD_BUG_ON_INVALID(expr)
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#endif
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enum drm_mm_search_flags {
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DRM_MM_SEARCH_DEFAULT = 0,
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DRM_MM_SEARCH_BEST = 1 << 0,
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@ -155,7 +161,7 @@ static inline u64 __drm_mm_hole_node_start(const struct drm_mm_node *hole_node)
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*/
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static inline u64 drm_mm_hole_node_start(const struct drm_mm_node *hole_node)
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{
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BUG_ON(!hole_node->hole_follows);
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DRM_MM_BUG_ON(!hole_node->hole_follows);
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return __drm_mm_hole_node_start(hole_node);
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}
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