2 * Copyright 2016 Advanced Micro Devices, Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
22 * Authors: Christian König
28 struct amdgpu_vram_mgr {
34 * amdgpu_vram_mgr_init - init VRAM manager and DRM MM
36 * @man: TTM memory type manager
37 * @p_size: maximum size of VRAM
39 * Allocate and initialize the VRAM manager.
41 static int amdgpu_vram_mgr_init(struct ttm_mem_type_manager *man,
44 struct amdgpu_vram_mgr *mgr;
46 mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
50 drm_mm_init(&mgr->mm, 0, p_size);
51 spin_lock_init(&mgr->lock);
57 * amdgpu_vram_mgr_fini - free and destroy VRAM manager
59 * @man: TTM memory type manager
61 * Destroy and free the VRAM manager, returns -EBUSY if ranges are still
62 * allocated inside it.
64 static int amdgpu_vram_mgr_fini(struct ttm_mem_type_manager *man)
66 struct amdgpu_vram_mgr *mgr = man->priv;
68 spin_lock(&mgr->lock);
69 if (!drm_mm_clean(&mgr->mm)) {
70 spin_unlock(&mgr->lock);
74 drm_mm_takedown(&mgr->mm);
75 spin_unlock(&mgr->lock);
82 * amdgpu_vram_mgr_new - allocate new ranges
84 * @man: TTM memory type manager
85 * @tbo: TTM BO we need this range for
86 * @place: placement flags and restrictions
87 * @mem: the resulting mem object
89 * Allocate VRAM for the given BO.
91 static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man,
92 struct ttm_buffer_object *tbo,
93 const struct ttm_place *place,
94 struct ttm_mem_reg *mem)
96 struct amdgpu_bo *bo = container_of(tbo, struct amdgpu_bo, tbo);
97 struct amdgpu_vram_mgr *mgr = man->priv;
98 struct drm_mm *mm = &mgr->mm;
99 struct drm_mm_node *nodes;
100 enum drm_mm_insert_mode mode;
101 unsigned long lpfn, num_nodes, pages_per_node, pages_left;
109 if (bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS ||
110 place->lpfn || amdgpu_vram_page_split == -1) {
111 pages_per_node = ~0ul;
114 pages_per_node = max((uint32_t)amdgpu_vram_page_split,
115 mem->page_alignment);
116 num_nodes = DIV_ROUND_UP(mem->num_pages, pages_per_node);
119 nodes = kcalloc(num_nodes, sizeof(*nodes), GFP_KERNEL);
123 mode = DRM_MM_INSERT_BEST;
124 if (place->flags & TTM_PL_FLAG_TOPDOWN)
125 mode = DRM_MM_INSERT_HIGH;
127 pages_left = mem->num_pages;
129 spin_lock(&mgr->lock);
130 for (i = 0; i < num_nodes; ++i) {
131 unsigned long pages = min(pages_left, pages_per_node);
132 uint32_t alignment = mem->page_alignment;
134 if (pages == pages_per_node)
135 alignment = pages_per_node;
137 r = drm_mm_insert_node_in_range(mm, &nodes[i],
146 spin_unlock(&mgr->lock);
148 mem->start = num_nodes == 1 ? nodes[0].start : AMDGPU_BO_INVALID_OFFSET;
149 mem->mm_node = nodes;
155 drm_mm_remove_node(&nodes[i]);
156 spin_unlock(&mgr->lock);
159 return r == -ENOSPC ? 0 : r;
163 * amdgpu_vram_mgr_del - free ranges
165 * @man: TTM memory type manager
166 * @tbo: TTM BO we need this range for
167 * @place: placement flags and restrictions
168 * @mem: TTM memory object
170 * Free the allocated VRAM again.
172 static void amdgpu_vram_mgr_del(struct ttm_mem_type_manager *man,
173 struct ttm_mem_reg *mem)
175 struct amdgpu_vram_mgr *mgr = man->priv;
176 struct drm_mm_node *nodes = mem->mm_node;
177 unsigned pages = mem->num_pages;
182 spin_lock(&mgr->lock);
184 pages -= nodes->size;
185 drm_mm_remove_node(nodes);
188 spin_unlock(&mgr->lock);
195 * amdgpu_vram_mgr_debug - dump VRAM table
197 * @man: TTM memory type manager
198 * @prefix: text prefix
200 * Dump the table content using printk.
202 static void amdgpu_vram_mgr_debug(struct ttm_mem_type_manager *man,
205 struct amdgpu_vram_mgr *mgr = man->priv;
206 struct drm_printer p = drm_debug_printer(prefix);
208 spin_lock(&mgr->lock);
209 drm_mm_print(&mgr->mm, &p);
210 spin_unlock(&mgr->lock);
213 const struct ttm_mem_type_manager_func amdgpu_vram_mgr_func = {
214 amdgpu_vram_mgr_init,
215 amdgpu_vram_mgr_fini,
218 amdgpu_vram_mgr_debug