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d38ceaf9 AD |
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 | ||
34 | int 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 | } | |
bbf0b345 | 43 | r = amdgpu_sa_bo_new(&adev->ring_tmp_bo, |
d38ceaf9 AD |
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 | ||
58 | bool 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 | ||
73 | bool 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 | ||
88 | void amdgpu_semaphore_free(struct amdgpu_device *adev, | |
89 | struct amdgpu_semaphore **semaphore, | |
4ce9891e | 90 | struct fence *fence) |
d38ceaf9 AD |
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 | } |