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
25 * $FreeBSD: head/sys/dev/drm2/radeon/radeon_semaphore.c 254885 2013-08-25 19:37:15Z dumbbell $
30 * Christian König <deathsimple@vodafone.de>
36 int radeon_semaphore_create(struct radeon_device *rdev,
37 struct radeon_semaphore **semaphore)
41 *semaphore = kmalloc(sizeof(struct radeon_semaphore), DRM_MEM_DRIVER,
43 if (*semaphore == NULL) {
46 r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo,
47 &(*semaphore)->sa_bo, 8, 8, true);
49 drm_free(*semaphore, DRM_MEM_DRIVER);
53 (*semaphore)->waiters = 0;
54 (*semaphore)->gpu_addr = radeon_sa_bo_gpu_addr((*semaphore)->sa_bo);
55 *((uint64_t*)radeon_sa_bo_cpu_addr((*semaphore)->sa_bo)) = 0;
59 void radeon_semaphore_emit_signal(struct radeon_device *rdev, int ring,
60 struct radeon_semaphore *semaphore)
63 radeon_semaphore_ring_emit(rdev, ring, &rdev->ring[ring], semaphore, false);
66 void radeon_semaphore_emit_wait(struct radeon_device *rdev, int ring,
67 struct radeon_semaphore *semaphore)
70 radeon_semaphore_ring_emit(rdev, ring, &rdev->ring[ring], semaphore, true);
73 /* caller must hold ring lock */
74 int radeon_semaphore_sync_rings(struct radeon_device *rdev,
75 struct radeon_semaphore *semaphore,
76 int signaler, int waiter)
80 /* no need to signal and wait on the same ring */
81 if (signaler == waiter) {
85 /* prevent GPU deadlocks */
86 if (!rdev->ring[signaler].ready) {
87 dev_err(rdev->dev, "Trying to sync to a disabled ring!");
91 r = radeon_ring_alloc(rdev, &rdev->ring[signaler], 8);
95 radeon_semaphore_emit_signal(rdev, signaler, semaphore);
96 radeon_ring_commit(rdev, &rdev->ring[signaler]);
98 /* we assume caller has already allocated space on waiters ring */
99 radeon_semaphore_emit_wait(rdev, waiter, semaphore);
101 /* for debugging lockup only, used by sysfs debug files */
102 rdev->ring[signaler].last_semaphore_signal_addr = semaphore->gpu_addr;
103 rdev->ring[waiter].last_semaphore_wait_addr = semaphore->gpu_addr;
108 void radeon_semaphore_free(struct radeon_device *rdev,
109 struct radeon_semaphore **semaphore,
110 struct radeon_fence *fence)
112 if (semaphore == NULL || *semaphore == NULL) {
115 if ((*semaphore)->waiters > 0) {
116 dev_err(rdev->dev, "semaphore %p has more waiters than signalers,"
117 " hardware lockup imminent!\n", *semaphore);
119 radeon_sa_bo_free(rdev, &(*semaphore)->sa_bo, fence);
120 drm_free(*semaphore, DRM_MEM_DRIVER);