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_device
*adev
= amdgpu_ttm_adev(man
->bdev
);
46 struct amdgpu_gtt_mgr
*mgr
;
49 mgr
= kzalloc(sizeof(*mgr
), GFP_KERNEL
);
53 start
= AMDGPU_GTT_MAX_TRANSFER_SIZE
* AMDGPU_GTT_NUM_TRANSFER_WINDOWS
;
54 size
= (adev
->mc
.gart_size
>> PAGE_SHIFT
) - start
;
55 drm_mm_init(&mgr
->mm
, start
, size
);
56 spin_lock_init(&mgr
->lock
);
57 atomic64_set(&mgr
->available
, p_size
);
63 * amdgpu_gtt_mgr_fini - free and destroy GTT manager
65 * @man: TTM memory type manager
67 * Destroy and free the GTT manager, returns -EBUSY if ranges are still
68 * allocated inside it.
70 static int amdgpu_gtt_mgr_fini(struct ttm_mem_type_manager
*man
)
72 struct amdgpu_gtt_mgr
*mgr
= man
->priv
;
74 spin_lock(&mgr
->lock
);
75 if (!drm_mm_clean(&mgr
->mm
)) {
76 spin_unlock(&mgr
->lock
);
80 drm_mm_takedown(&mgr
->mm
);
81 spin_unlock(&mgr
->lock
);
88 * amdgpu_gtt_mgr_is_allocated - Check if mem has address space
90 * @mem: the mem object to check
92 * Check if a mem object has already address space allocated.
94 bool amdgpu_gtt_mgr_is_allocated(struct ttm_mem_reg
*mem
)
96 struct drm_mm_node
*node
= mem
->mm_node
;
98 return (node
->start
!= AMDGPU_BO_INVALID_OFFSET
);
102 * amdgpu_gtt_mgr_alloc - allocate new ranges
104 * @man: TTM memory type manager
105 * @tbo: TTM BO we need this range for
106 * @place: placement flags and restrictions
107 * @mem: the resulting mem object
109 * Allocate the address space for a node.
111 int amdgpu_gtt_mgr_alloc(struct ttm_mem_type_manager
*man
,
112 struct ttm_buffer_object
*tbo
,
113 const struct ttm_place
*place
,
114 struct ttm_mem_reg
*mem
)
116 struct amdgpu_device
*adev
= amdgpu_ttm_adev(man
->bdev
);
117 struct amdgpu_gtt_mgr
*mgr
= man
->priv
;
118 struct drm_mm_node
*node
= mem
->mm_node
;
119 enum drm_mm_insert_mode mode
;
120 unsigned long fpfn
, lpfn
;
123 if (amdgpu_gtt_mgr_is_allocated(mem
))
131 if (place
&& place
->lpfn
)
134 lpfn
= adev
->gart
.num_cpu_pages
;
136 mode
= DRM_MM_INSERT_BEST
;
137 if (place
&& place
->flags
& TTM_PL_FLAG_TOPDOWN
)
138 mode
= DRM_MM_INSERT_HIGH
;
140 spin_lock(&mgr
->lock
);
141 r
= drm_mm_insert_node_in_range(&mgr
->mm
, node
,
142 mem
->num_pages
, mem
->page_alignment
, 0,
144 spin_unlock(&mgr
->lock
);
147 mem
->start
= node
->start
;
148 if (&tbo
->mem
== mem
)
149 tbo
->offset
= (tbo
->mem
.start
<< PAGE_SHIFT
) +
150 tbo
->bdev
->man
[tbo
->mem
.mem_type
].gpu_offset
;
157 * amdgpu_gtt_mgr_new - allocate a new node
159 * @man: TTM memory type manager
160 * @tbo: TTM BO we need this range for
161 * @place: placement flags and restrictions
162 * @mem: the resulting mem object
164 * Dummy, allocate the node but no space for it yet.
166 static int amdgpu_gtt_mgr_new(struct ttm_mem_type_manager
*man
,
167 struct ttm_buffer_object
*tbo
,
168 const struct ttm_place
*place
,
169 struct ttm_mem_reg
*mem
)
171 struct amdgpu_gtt_mgr
*mgr
= man
->priv
;
172 struct drm_mm_node
*node
;
175 spin_lock(&mgr
->lock
);
176 if (atomic64_read(&mgr
->available
) < mem
->num_pages
) {
177 spin_unlock(&mgr
->lock
);
180 atomic64_sub(mem
->num_pages
, &mgr
->available
);
181 spin_unlock(&mgr
->lock
);
183 node
= kzalloc(sizeof(*node
), GFP_KERNEL
);
189 node
->start
= AMDGPU_BO_INVALID_OFFSET
;
190 node
->size
= mem
->num_pages
;
193 if (place
->fpfn
|| place
->lpfn
|| place
->flags
& TTM_PL_FLAG_TOPDOWN
) {
194 r
= amdgpu_gtt_mgr_alloc(man
, tbo
, place
, mem
);
202 mem
->start
= node
->start
;
207 atomic64_add(mem
->num_pages
, &mgr
->available
);
213 * amdgpu_gtt_mgr_del - free ranges
215 * @man: TTM memory type manager
216 * @tbo: TTM BO we need this range for
217 * @place: placement flags and restrictions
218 * @mem: TTM memory object
220 * Free the allocated GTT again.
222 static void amdgpu_gtt_mgr_del(struct ttm_mem_type_manager
*man
,
223 struct ttm_mem_reg
*mem
)
225 struct amdgpu_gtt_mgr
*mgr
= man
->priv
;
226 struct drm_mm_node
*node
= mem
->mm_node
;
231 spin_lock(&mgr
->lock
);
232 if (node
->start
!= AMDGPU_BO_INVALID_OFFSET
)
233 drm_mm_remove_node(node
);
234 spin_unlock(&mgr
->lock
);
235 atomic64_add(mem
->num_pages
, &mgr
->available
);
242 * amdgpu_gtt_mgr_usage - return usage of GTT domain
244 * @man: TTM memory type manager
246 * Return how many bytes are used in the GTT domain
248 uint64_t amdgpu_gtt_mgr_usage(struct ttm_mem_type_manager
*man
)
250 struct amdgpu_gtt_mgr
*mgr
= man
->priv
;
252 return (u64
)(man
->size
- atomic64_read(&mgr
->available
)) * PAGE_SIZE
;
256 * amdgpu_gtt_mgr_debug - dump VRAM table
258 * @man: TTM memory type manager
259 * @printer: DRM printer to use
261 * Dump the table content using printk.
263 static void amdgpu_gtt_mgr_debug(struct ttm_mem_type_manager
*man
,
264 struct drm_printer
*printer
)
266 struct amdgpu_gtt_mgr
*mgr
= man
->priv
;
268 spin_lock(&mgr
->lock
);
269 drm_mm_print(&mgr
->mm
, printer
);
270 spin_unlock(&mgr
->lock
);
272 drm_printf(printer
, "man size:%llu pages, gtt available:%llu pages, usage:%lluMB\n",
273 man
->size
, (u64
)atomic64_read(&mgr
->available
),
274 amdgpu_gtt_mgr_usage(man
) >> 20);
277 const struct ttm_mem_type_manager_func amdgpu_gtt_mgr_func
= {
278 .init
= amdgpu_gtt_mgr_init
,
279 .takedown
= amdgpu_gtt_mgr_fini
,
280 .get_node
= amdgpu_gtt_mgr_new
,
281 .put_node
= amdgpu_gtt_mgr_del
,
282 .debug
= amdgpu_gtt_mgr_debug