2 * Copyright 2014 Advanced Micro Devices, Inc.
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
16 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
17 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
18 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
19 * USE OR OTHER DEALINGS IN THE SOFTWARE.
21 * The above copyright notice and this permission notice (including the
22 * next paragraph) shall be included in all copies or substantial portions
28 * Christian König <christian.koenig@amd.com>
33 #include "amdgpu_trace.h"
35 struct amdgpu_sync_entry
{
36 struct hlist_node node
;
40 static struct kmem_cache
*amdgpu_sync_slab
;
43 * amdgpu_sync_create - zero init sync object
45 * @sync: sync object to initialize
47 * Just clear the sync object for now.
49 void amdgpu_sync_create(struct amdgpu_sync
*sync
)
51 hash_init(sync
->fences
);
52 sync
->last_vm_update
= NULL
;
56 * amdgpu_sync_same_dev - test if fence belong to us
58 * @adev: amdgpu device to use for the test
61 * Test if the fence was issued by us.
63 static bool amdgpu_sync_same_dev(struct amdgpu_device
*adev
, struct fence
*f
)
65 struct amd_sched_fence
*s_fence
= to_amd_sched_fence(f
);
68 struct amdgpu_ring
*ring
;
70 ring
= container_of(s_fence
->sched
, struct amdgpu_ring
, sched
);
71 return ring
->adev
== adev
;
78 * amdgpu_sync_get_owner - extract the owner of a fence
80 * @fence: fence get the owner from
82 * Extract who originally created the fence.
84 static void *amdgpu_sync_get_owner(struct fence
*f
)
86 struct amd_sched_fence
*s_fence
= to_amd_sched_fence(f
);
89 return s_fence
->owner
;
91 return AMDGPU_FENCE_OWNER_UNDEFINED
;
95 * amdgpu_sync_keep_later - Keep the later fence
97 * @keep: existing fence to test
100 * Either keep the existing fence or the new one, depending which one is later.
102 static void amdgpu_sync_keep_later(struct fence
**keep
, struct fence
*fence
)
104 if (*keep
&& fence_is_later(*keep
, fence
))
108 *keep
= fence_get(fence
);
112 * amdgpu_sync_fence - remember to sync to this fence
114 * @sync: sync object to add fence to
115 * @fence: fence to sync to
118 int amdgpu_sync_fence(struct amdgpu_device
*adev
, struct amdgpu_sync
*sync
,
121 struct amdgpu_sync_entry
*e
;
126 if (amdgpu_sync_same_dev(adev
, f
) &&
127 amdgpu_sync_get_owner(f
) == AMDGPU_FENCE_OWNER_VM
)
128 amdgpu_sync_keep_later(&sync
->last_vm_update
, f
);
130 hash_for_each_possible(sync
->fences
, e
, node
, f
->context
) {
131 if (unlikely(e
->fence
->context
!= f
->context
))
134 amdgpu_sync_keep_later(&e
->fence
, f
);
138 e
= kmem_cache_alloc(amdgpu_sync_slab
, GFP_KERNEL
);
142 hash_add(sync
->fences
, &e
->node
, f
->context
);
143 e
->fence
= fence_get(f
);
148 * amdgpu_sync_resv - sync to a reservation object
150 * @sync: sync object to add fences from reservation object to
151 * @resv: reservation object with embedded fence
152 * @shared: true if we should only sync to the exclusive fence
156 int amdgpu_sync_resv(struct amdgpu_device
*adev
,
157 struct amdgpu_sync
*sync
,
158 struct reservation_object
*resv
,
161 struct reservation_object_list
*flist
;
170 /* always sync to the exclusive fence */
171 f
= reservation_object_get_excl(resv
);
172 r
= amdgpu_sync_fence(adev
, sync
, f
);
174 flist
= reservation_object_get_list(resv
);
178 for (i
= 0; i
< flist
->shared_count
; ++i
) {
179 f
= rcu_dereference_protected(flist
->shared
[i
],
180 reservation_object_held(resv
));
181 if (amdgpu_sync_same_dev(adev
, f
)) {
182 /* VM updates are only interesting
183 * for other VM updates and moves.
185 fence_owner
= amdgpu_sync_get_owner(f
);
186 if ((owner
!= AMDGPU_FENCE_OWNER_UNDEFINED
) &&
187 (fence_owner
!= AMDGPU_FENCE_OWNER_UNDEFINED
) &&
188 ((owner
== AMDGPU_FENCE_OWNER_VM
) !=
189 (fence_owner
== AMDGPU_FENCE_OWNER_VM
)))
192 /* Ignore fence from the same owner as
193 * long as it isn't undefined.
195 if (owner
!= AMDGPU_FENCE_OWNER_UNDEFINED
&&
196 fence_owner
== owner
)
200 r
= amdgpu_sync_fence(adev
, sync
, f
);
207 struct fence
*amdgpu_sync_get_fence(struct amdgpu_sync
*sync
)
209 struct amdgpu_sync_entry
*e
;
210 struct hlist_node
*tmp
;
214 hash_for_each_safe(sync
->fences
, i
, tmp
, e
, node
) {
219 kmem_cache_free(amdgpu_sync_slab
, e
);
221 if (!fence_is_signaled(f
))
229 int amdgpu_sync_wait(struct amdgpu_sync
*sync
)
231 struct amdgpu_sync_entry
*e
;
232 struct hlist_node
*tmp
;
235 hash_for_each_safe(sync
->fences
, i
, tmp
, e
, node
) {
236 r
= fence_wait(e
->fence
, false);
242 kmem_cache_free(amdgpu_sync_slab
, e
);
249 * amdgpu_sync_free - free the sync object
251 * @sync: sync object to use
253 * Free the sync object.
255 void amdgpu_sync_free(struct amdgpu_sync
*sync
)
257 struct amdgpu_sync_entry
*e
;
258 struct hlist_node
*tmp
;
261 hash_for_each_safe(sync
->fences
, i
, tmp
, e
, node
) {
264 kmem_cache_free(amdgpu_sync_slab
, e
);
267 fence_put(sync
->last_vm_update
);
271 * amdgpu_sync_init - init sync object subsystem
273 * Allocate the slab allocator.
275 int amdgpu_sync_init(void)
277 amdgpu_sync_slab
= kmem_cache_create(
278 "amdgpu_sync", sizeof(struct amdgpu_sync_entry
), 0,
279 SLAB_HWCACHE_ALIGN
, NULL
);
280 if (!amdgpu_sync_slab
)
287 * amdgpu_sync_fini - fini sync object subsystem
289 * Free the slab allocator.
291 void amdgpu_sync_fini(void)
293 kmem_cache_destroy(amdgpu_sync_slab
);