Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/*
2 * Copyright 2011 Christian König.
3 * All Rights Reserved.
4 *
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:
12 *
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.
20 *
21 * The above copyright notice and this permission notice (including the
22 * next paragraph) shall be included in all copies or substantial portions
23 * of the Software.
24 *
25 */
26/*
27 * Authors:
28 * Christian König <deathsimple@vodafone.de>
29 */
30#include <drm/drmP.h>
31#include "amdgpu.h"
32#include "amdgpu_trace.h"
33
34int amdgpu_semaphore_create(struct amdgpu_device *adev,
35 struct amdgpu_semaphore **semaphore)
36{
37 int r;
38
39 *semaphore = kmalloc(sizeof(struct amdgpu_semaphore), GFP_KERNEL);
40 if (*semaphore == NULL) {
41 return -ENOMEM;
42 }
43 r = amdgpu_sa_bo_new(adev, &adev->ring_tmp_bo,
44 &(*semaphore)->sa_bo, 8, 8);
45 if (r) {
46 kfree(*semaphore);
47 *semaphore = NULL;
48 return r;
49 }
50 (*semaphore)->waiters = 0;
51 (*semaphore)->gpu_addr = amdgpu_sa_bo_gpu_addr((*semaphore)->sa_bo);
52
53 *((uint64_t *)amdgpu_sa_bo_cpu_addr((*semaphore)->sa_bo)) = 0;
54
55 return 0;
56}
57
58bool amdgpu_semaphore_emit_signal(struct amdgpu_ring *ring,
59 struct amdgpu_semaphore *semaphore)
60{
61 trace_amdgpu_semaphore_signale(ring->idx, semaphore);
62
63 if (amdgpu_ring_emit_semaphore(ring, semaphore, false)) {
64 --semaphore->waiters;
65
66 /* for debugging lockup only, used by sysfs debug files */
67 ring->last_semaphore_signal_addr = semaphore->gpu_addr;
68 return true;
69 }
70 return false;
71}
72
73bool amdgpu_semaphore_emit_wait(struct amdgpu_ring *ring,
74 struct amdgpu_semaphore *semaphore)
75{
76 trace_amdgpu_semaphore_wait(ring->idx, semaphore);
77
78 if (amdgpu_ring_emit_semaphore(ring, semaphore, true)) {
79 ++semaphore->waiters;
80
81 /* for debugging lockup only, used by sysfs debug files */
82 ring->last_semaphore_wait_addr = semaphore->gpu_addr;
83 return true;
84 }
85 return false;
86}
87
88void amdgpu_semaphore_free(struct amdgpu_device *adev,
89 struct amdgpu_semaphore **semaphore,
90 struct fence *fence)
91{
92 if (semaphore == NULL || *semaphore == NULL) {
93 return;
94 }
95 if ((*semaphore)->waiters > 0) {
96 dev_err(adev->dev, "semaphore %p has more waiters than signalers,"
97 " hardware lockup imminent!\n", *semaphore);
98 }
99 amdgpu_sa_bo_free(adev, &(*semaphore)->sa_bo, fence);
100 kfree(*semaphore);
101 *semaphore = NULL;
102}