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 /* caller must hold ring lock */
72 int radeon_semaphore_sync_rings(struct radeon_device *rdev,
73 struct radeon_semaphore *semaphore,
74 int signaler, int waiter)
78 /* no need to signal and wait on the same ring */
79 if (signaler == waiter) {
83 /* prevent GPU deadlocks */
84 if (!rdev->ring[signaler].ready) {
85 dev_err(rdev->dev, "Trying to sync to a disabled ring!");
89 r = radeon_ring_alloc(rdev, &rdev->ring[signaler], 8);
93 radeon_semaphore_emit_signal(rdev, signaler, semaphore);
94 radeon_ring_commit(rdev, &rdev->ring[signaler]);
96 /* we assume caller has already allocated space on waiters ring */
97 radeon_semaphore_emit_wait(rdev, waiter, semaphore);
102 void radeon_semaphore_free(struct radeon_device *rdev,
103 struct radeon_semaphore **semaphore,
104 struct radeon_fence *fence)
106 if (semaphore == NULL || *semaphore == NULL) {
109 if ((*semaphore)->waiters > 0) {
110 dev_err(rdev->dev, "semaphore %p has more waiters than signalers,"
111 " hardware lockup imminent!\n", *semaphore);
113 radeon_sa_bo_free(rdev, &(*semaphore)->sa_bo, fence);