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_gtt_mgr {
35 * amdgpu_gtt_mgr_init - init GTT manager and DRM MM
37 * @man: TTM memory type manager
38 * @p_size: maximum size of GTT
40 * Allocate and initialize the GTT manager.
42 static int amdgpu_gtt_mgr_init(struct ttm_mem_type_manager *man,
45 struct amdgpu_gtt_mgr *mgr;
47 mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
51 drm_mm_init(&mgr->mm, 0, p_size);
52 spin_lock_init(&mgr->lock);
53 mgr->available = p_size;
59 * amdgpu_gtt_mgr_fini - free and destroy GTT manager
61 * @man: TTM memory type manager
63 * Destroy and free the GTT manager, returns -EBUSY if ranges are still
64 * allocated inside it.
66 static int amdgpu_gtt_mgr_fini(struct ttm_mem_type_manager *man)
68 struct amdgpu_gtt_mgr *mgr = man->priv;
70 spin_lock(&mgr->lock);
71 if (!drm_mm_clean(&mgr->mm)) {
72 spin_unlock(&mgr->lock);
76 drm_mm_takedown(&mgr->mm);
77 spin_unlock(&mgr->lock);
84 * amdgpu_gtt_mgr_alloc - allocate new ranges
86 * @man: TTM memory type manager
87 * @tbo: TTM BO we need this range for
88 * @place: placement flags and restrictions
89 * @mem: the resulting mem object
91 * Allocate the address space for a node.
93 int amdgpu_gtt_mgr_alloc(struct ttm_mem_type_manager *man,
94 struct ttm_buffer_object *tbo,
95 const struct ttm_place *place,
96 struct ttm_mem_reg *mem)
98 struct amdgpu_gtt_mgr *mgr = man->priv;
99 struct drm_mm_node *node = mem->mm_node;
100 enum drm_mm_search_flags sflags = DRM_MM_SEARCH_BEST;
101 enum drm_mm_allocator_flags aflags = DRM_MM_CREATE_DEFAULT;
102 unsigned long fpfn, lpfn;
105 if (node->start != AMDGPU_BO_INVALID_OFFSET)
113 if (place && place->lpfn)
118 if (place && place->flags & TTM_PL_FLAG_TOPDOWN) {
119 sflags = DRM_MM_SEARCH_BELOW;
120 aflags = DRM_MM_CREATE_TOP;
123 spin_lock(&mgr->lock);
124 r = drm_mm_insert_node_in_range_generic(&mgr->mm, node, mem->num_pages,
125 mem->page_alignment, 0,
126 fpfn, lpfn, sflags, aflags);
127 spin_unlock(&mgr->lock);
130 mem->start = node->start;
131 if (&tbo->mem == mem)
132 tbo->offset = (tbo->mem.start << PAGE_SHIFT) +
133 tbo->bdev->man[tbo->mem.mem_type].gpu_offset;
140 * amdgpu_gtt_mgr_new - allocate a new node
142 * @man: TTM memory type manager
143 * @tbo: TTM BO we need this range for
144 * @place: placement flags and restrictions
145 * @mem: the resulting mem object
147 * Dummy, allocate the node but no space for it yet.
149 static int amdgpu_gtt_mgr_new(struct ttm_mem_type_manager *man,
150 struct ttm_buffer_object *tbo,
151 const struct ttm_place *place,
152 struct ttm_mem_reg *mem)
154 struct amdgpu_gtt_mgr *mgr = man->priv;
155 struct drm_mm_node *node;
158 spin_lock(&mgr->lock);
159 if (mgr->available < mem->num_pages) {
160 spin_unlock(&mgr->lock);
163 mgr->available -= mem->num_pages;
164 spin_unlock(&mgr->lock);
166 node = kzalloc(sizeof(*node), GFP_KERNEL);
172 node->start = AMDGPU_BO_INVALID_OFFSET;
173 node->size = mem->num_pages;
176 if (place->fpfn || place->lpfn || place->flags & TTM_PL_FLAG_TOPDOWN) {
177 r = amdgpu_gtt_mgr_alloc(man, tbo, place, mem);
185 mem->start = node->start;
190 spin_lock(&mgr->lock);
191 mgr->available += mem->num_pages;
192 spin_unlock(&mgr->lock);
198 * amdgpu_gtt_mgr_del - free ranges
200 * @man: TTM memory type manager
201 * @tbo: TTM BO we need this range for
202 * @place: placement flags and restrictions
203 * @mem: TTM memory object
205 * Free the allocated GTT again.
207 static void amdgpu_gtt_mgr_del(struct ttm_mem_type_manager *man,
208 struct ttm_mem_reg *mem)
210 struct amdgpu_gtt_mgr *mgr = man->priv;
211 struct drm_mm_node *node = mem->mm_node;
216 spin_lock(&mgr->lock);
217 if (node->start != AMDGPU_BO_INVALID_OFFSET)
218 drm_mm_remove_node(node);
219 mgr->available += mem->num_pages;
220 spin_unlock(&mgr->lock);
227 * amdgpu_gtt_mgr_debug - dump VRAM table
229 * @man: TTM memory type manager
230 * @prefix: text prefix
232 * Dump the table content using printk.
234 static void amdgpu_gtt_mgr_debug(struct ttm_mem_type_manager *man,
237 struct amdgpu_gtt_mgr *mgr = man->priv;
239 spin_lock(&mgr->lock);
240 drm_mm_debug_table(&mgr->mm, prefix);
241 spin_unlock(&mgr->lock);
244 const struct ttm_mem_type_manager_func amdgpu_gtt_mgr_func = {