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28 * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
30 * $FreeBSD: head/sys/dev/drm2/ttm/ttm_bo_manager.c 247835 2013-03-05 09:49:34Z kib $
33 #include <drm/ttm/ttm_module.h>
34 #include <drm/ttm/ttm_bo_driver.h>
35 #include <drm/ttm/ttm_placement.h>
36 #include <drm/drm_mm.h>
37 #include <linux/export.h>
40 * Currently we use a spinlock for the lock, but a mutex *may* be
41 * more appropriate to reduce scheduling latency if the range manager
42 * ends up with very fragmented allocation patterns.
45 struct ttm_range_manager {
50 static int ttm_bo_man_get_node(struct ttm_mem_type_manager *man,
51 struct ttm_buffer_object *bo,
52 struct ttm_placement *placement,
53 struct ttm_mem_reg *mem)
55 struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv;
56 struct drm_mm *mm = &rman->mm;
57 struct drm_mm_node *node = NULL;
61 lpfn = placement->lpfn;
65 node = kzalloc(sizeof(*node), GFP_KERNEL);
69 lockmgr(&rman->lock, LK_EXCLUSIVE);
70 ret = drm_mm_insert_node_in_range(mm, node, mem->num_pages,
72 placement->fpfn, lpfn,
74 lockmgr(&rman->lock, LK_RELEASE);
80 mem->start = node->start;
86 static void ttm_bo_man_put_node(struct ttm_mem_type_manager *man,
87 struct ttm_mem_reg *mem)
89 struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv;
92 lockmgr(&rman->lock, LK_EXCLUSIVE);
93 drm_mm_remove_node(mem->mm_node);
94 lockmgr(&rman->lock, LK_RELEASE);
101 static int ttm_bo_man_init(struct ttm_mem_type_manager *man,
102 unsigned long p_size)
104 struct ttm_range_manager *rman;
106 rman = kmalloc(sizeof(*rman), M_DRM, M_ZERO | M_WAITOK);
110 drm_mm_init(&rman->mm, 0, p_size);
112 lockinit(&rman->lock, "ttmrman", 0, LK_CANRECURSE);
117 static int ttm_bo_man_takedown(struct ttm_mem_type_manager *man)
119 struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv;
120 struct drm_mm *mm = &rman->mm;
122 lockmgr(&rman->lock, LK_EXCLUSIVE);
123 if (drm_mm_clean(mm)) {
125 lockmgr(&rman->lock, LK_RELEASE);
130 lockmgr(&rman->lock, LK_RELEASE);
134 static void ttm_bo_man_debug(struct ttm_mem_type_manager *man,
137 struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv;
139 lockmgr(&rman->lock, LK_EXCLUSIVE);
140 drm_mm_debug_table(&rman->mm, prefix);
141 lockmgr(&rman->lock, LK_RELEASE);
144 const struct ttm_mem_type_manager_func ttm_bo_manager_func = {
151 EXPORT_SYMBOL(ttm_bo_manager_func);