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>
32 #include "radeon_trace.h"
35 * radeon_sync_create - zero init sync object
37 * @sync: sync object to initialize
39 * Just clear the sync object for now.
41 void radeon_sync_create(struct radeon_sync
*sync
)
45 for (i
= 0; i
< RADEON_NUM_SYNCS
; ++i
)
46 sync
->semaphores
[i
] = NULL
;
48 for (i
= 0; i
< RADEON_NUM_RINGS
; ++i
)
49 sync
->sync_to
[i
] = NULL
;
51 sync
->last_vm_update
= NULL
;
55 * radeon_sync_fence - use the semaphore to sync to a fence
57 * @sync: sync object to add fence to
58 * @fence: fence to sync to
60 * Sync to the fence using the semaphore objects
62 void radeon_sync_fence(struct radeon_sync
*sync
,
63 struct radeon_fence
*fence
)
65 struct radeon_fence
*other
;
70 other
= sync
->sync_to
[fence
->ring
];
71 sync
->sync_to
[fence
->ring
] = radeon_fence_later(fence
, other
);
73 if (fence
->is_vm_update
) {
74 other
= sync
->last_vm_update
;
75 sync
->last_vm_update
= radeon_fence_later(fence
, other
);
80 * radeon_sync_resv - use the semaphores to sync to a reservation object
82 * @rdev: radeon_device pointer
83 * @sync: sync object to add fences from reservation object to
84 * @resv: reservation object with embedded fence
85 * @shared: true if we should only sync to the exclusive fence
87 * Sync to the fence using the semaphore objects
89 int radeon_sync_resv(struct radeon_device
*rdev
,
90 struct radeon_sync
*sync
,
91 struct dma_resv
*resv
,
94 struct dma_resv_list
*flist
;
96 struct radeon_fence
*fence
;
100 /* always sync to the exclusive fence */
101 f
= dma_resv_get_excl(resv
);
102 fence
= f
? to_radeon_fence(f
) : NULL
;
103 if (fence
&& fence
->rdev
== rdev
)
104 radeon_sync_fence(sync
, fence
);
106 r
= dma_fence_wait(f
, true);
108 flist
= dma_resv_get_list(resv
);
109 if (shared
|| !flist
|| r
)
112 for (i
= 0; i
< flist
->shared_count
; ++i
) {
113 f
= rcu_dereference_protected(flist
->shared
[i
],
114 dma_resv_held(resv
));
115 fence
= to_radeon_fence(f
);
116 if (fence
&& fence
->rdev
== rdev
)
117 radeon_sync_fence(sync
, fence
);
119 r
= dma_fence_wait(f
, true);
128 * radeon_sync_rings - sync ring to all registered fences
130 * @rdev: radeon_device pointer
131 * @sync: sync object to use
132 * @ring: ring that needs sync
134 * Ensure that all registered fences are signaled before letting
135 * the ring continue. The caller must hold the ring lock.
137 int radeon_sync_rings(struct radeon_device
*rdev
,
138 struct radeon_sync
*sync
,
144 for (i
= 0; i
< RADEON_NUM_RINGS
; ++i
) {
145 struct radeon_fence
*fence
= sync
->sync_to
[i
];
146 struct radeon_semaphore
*semaphore
;
148 /* check if we really need to sync */
149 if (!radeon_fence_need_sync(fence
, ring
))
152 /* prevent GPU deadlocks */
153 if (!rdev
->ring
[i
].ready
) {
154 dev_err(rdev
->dev
, "Syncing to a disabled ring!");
158 if (count
>= RADEON_NUM_SYNCS
) {
159 /* not enough room, wait manually */
160 r
= radeon_fence_wait(fence
, false);
165 r
= radeon_semaphore_create(rdev
, &semaphore
);
169 sync
->semaphores
[count
++] = semaphore
;
171 /* allocate enough space for sync command */
172 r
= radeon_ring_alloc(rdev
, &rdev
->ring
[i
], 16);
176 /* emit the signal semaphore */
177 if (!radeon_semaphore_emit_signal(rdev
, i
, semaphore
)) {
178 /* signaling wasn't successful wait manually */
179 radeon_ring_undo(&rdev
->ring
[i
]);
180 r
= radeon_fence_wait(fence
, false);
186 /* we assume caller has already allocated space on waiters ring */
187 if (!radeon_semaphore_emit_wait(rdev
, ring
, semaphore
)) {
188 /* waiting wasn't successful wait manually */
189 radeon_ring_undo(&rdev
->ring
[i
]);
190 r
= radeon_fence_wait(fence
, false);
196 radeon_ring_commit(rdev
, &rdev
->ring
[i
], false);
197 radeon_fence_note_sync(fence
, ring
);
204 * radeon_sync_free - free the sync object
206 * @rdev: radeon_device pointer
207 * @sync: sync object to use
208 * @fence: fence to use for the free
210 * Free the sync object by freeing all semaphores in it.
212 void radeon_sync_free(struct radeon_device
*rdev
,
213 struct radeon_sync
*sync
,
214 struct radeon_fence
*fence
)
218 for (i
= 0; i
< RADEON_NUM_SYNCS
; ++i
)
219 radeon_semaphore_free(rdev
, &sync
->semaphores
[i
], fence
);