diff options
author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2010-09-16 15:13:11 +0200 |
---|---|---|
committer | Chris Wilson <chris@chris-wilson.co.uk> | 2010-10-27 23:31:04 +0100 |
commit | d935cc61d466f6cc7514032835f4fc379cb7e2ca (patch) | |
tree | c2ebcf0d6abe581a7a88fa87029d4a3bd55e80b7 /drivers | |
parent | 3cce469cab880ef8990d2d16d745bf85443fc998 (diff) |
drm_mm: add support for range-restricted fair-lru scans
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/gpu/drm/drm_mm.c | 40 |
1 files changed, 39 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c index a6bfc302ed9..c59515ba7e6 100644 --- a/drivers/gpu/drm/drm_mm.c +++ b/drivers/gpu/drm/drm_mm.c @@ -392,10 +392,36 @@ void drm_mm_init_scan(struct drm_mm *mm, unsigned long size, mm->scanned_blocks = 0; mm->scan_hit_start = 0; mm->scan_hit_size = 0; + mm->scan_check_range = 0; } EXPORT_SYMBOL(drm_mm_init_scan); /** + * Initializa lru scanning. + * + * This simply sets up the scanning routines with the parameters for the desired + * hole. This version is for range-restricted scans. + * + * Warning: As long as the scan list is non-empty, no other operations than + * adding/removing nodes to/from the scan list are allowed. + */ +void drm_mm_init_scan_with_range(struct drm_mm *mm, unsigned long size, + unsigned alignment, + unsigned long start, + unsigned long end) +{ + mm->scan_alignment = alignment; + mm->scan_size = size; + mm->scanned_blocks = 0; + mm->scan_hit_start = 0; + mm->scan_hit_size = 0; + mm->scan_start = start; + mm->scan_end = end; + mm->scan_check_range = 1; +} +EXPORT_SYMBOL(drm_mm_init_scan_with_range); + +/** * Add a node to the scan list that might be freed to make space for the desired * hole. * @@ -406,6 +432,8 @@ int drm_mm_scan_add_block(struct drm_mm_node *node) struct drm_mm *mm = node->mm; struct list_head *prev_free, *next_free; struct drm_mm_node *prev_node, *next_node; + unsigned long adj_start; + unsigned long adj_end; mm->scanned_blocks++; @@ -452,7 +480,17 @@ int drm_mm_scan_add_block(struct drm_mm_node *node) node->free_stack.prev = prev_free; node->free_stack.next = next_free; - if (check_free_hole(node->start, node->start + node->size, + if (mm->scan_check_range) { + adj_start = node->start < mm->scan_start ? + mm->scan_start : node->start; + adj_end = node->start + node->size > mm->scan_end ? + mm->scan_end : node->start + node->size; + } else { + adj_start = node->start; + adj_end = node->start + node->size; + } + + if (check_free_hole(adj_start , adj_end, mm->scan_size, mm->scan_alignment)) { mm->scan_hit_start = node->start; mm->scan_hit_size = node->size; |