2 * Copyright 2011 Christian König.
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 <deathsimple@vodafone.de>
35 int radeon_semaphore_create(struct radeon_device *rdev,
36 struct radeon_semaphore **semaphore)
40 *semaphore = kmalloc(sizeof(struct radeon_semaphore), GFP_KERNEL);
41 if (*semaphore == NULL) {
44 r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo,
45 &(*semaphore)->sa_bo, 8, 8, true);
51 (*semaphore)->waiters = 0;
52 (*semaphore)->gpu_addr = radeon_sa_bo_gpu_addr((*semaphore)->sa_bo);
53 *((uint64_t*)radeon_sa_bo_cpu_addr((*semaphore)->sa_bo)) = 0;
57 void radeon_semaphore_emit_signal(struct radeon_device *rdev, int ring,
58 struct radeon_semaphore *semaphore)
61 radeon_semaphore_ring_emit(rdev, ring, &rdev->ring[ring], semaphore, false);
64 void radeon_semaphore_emit_wait(struct radeon_device *rdev, int ring,
65 struct radeon_semaphore *semaphore)
68 radeon_semaphore_ring_emit(rdev, ring, &rdev->ring[ring], semaphore, true);
71 int radeon_semaphore_sync_rings(struct radeon_device *rdev,
72 struct radeon_semaphore *semaphore,
73 bool sync_to[RADEON_NUM_RINGS],
78 mutex_lock(&rdev->ring_lock);
79 r = radeon_ring_alloc(rdev, &rdev->ring[dst_ring], RADEON_NUM_RINGS * 8);
84 for (i = 0; i < RADEON_NUM_RINGS; ++i) {
85 /* no need to sync to our own or unused rings */
86 if (!sync_to[i] || i == dst_ring)
89 /* prevent GPU deadlocks */
90 if (!rdev->ring[i].ready) {
91 dev_err(rdev->dev, "Trying to sync to a disabled ring!");
96 r = radeon_ring_alloc(rdev, &rdev->ring[i], 8);
101 radeon_semaphore_emit_signal(rdev, i, semaphore);
102 radeon_semaphore_emit_wait(rdev, dst_ring, semaphore);
104 radeon_ring_commit(rdev, &rdev->ring[i]);
107 radeon_ring_commit(rdev, &rdev->ring[dst_ring]);
108 mutex_unlock(&rdev->ring_lock);
113 /* unlock all locks taken so far */
114 for (--i; i >= 0; --i) {
115 if (sync_to[i] || i == dst_ring) {
116 radeon_ring_undo(&rdev->ring[i]);
119 radeon_ring_undo(&rdev->ring[dst_ring]);
120 mutex_unlock(&rdev->ring_lock);
124 void radeon_semaphore_free(struct radeon_device *rdev,
125 struct radeon_semaphore *semaphore,
126 struct radeon_fence *fence)
128 if (semaphore == NULL) {
131 if (semaphore->waiters > 0) {
132 dev_err(rdev->dev, "semaphore %p has more waiters than signalers,"
133 " hardware lockup imminent!\n", semaphore);
135 radeon_sa_bo_free(rdev, &semaphore->sa_bo, fence);