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 | |
31 | #include "radeon.h" |
32 | #include "radeon_trace.h" |
33 | |
34 | int radeon_semaphore_create(struct radeon_device *rdev, |
35 | struct radeon_semaphore **semaphore) |
36 | { |
37 | int r; |
38 | |
39 | *semaphore = kmalloc(size: sizeof(struct radeon_semaphore), GFP_KERNEL); |
40 | if (*semaphore == NULL) { |
41 | return -ENOMEM; |
42 | } |
43 | r = radeon_sa_bo_new(sa_manager: &rdev->ring_tmp_bo, |
44 | sa_bo: &(*semaphore)->sa_bo, size: 8, align: 8); |
45 | if (r) { |
46 | kfree(objp: *semaphore); |
47 | *semaphore = NULL; |
48 | return r; |
49 | } |
50 | (*semaphore)->waiters = 0; |
51 | (*semaphore)->gpu_addr = radeon_sa_bo_gpu_addr(sa_bo: (*semaphore)->sa_bo); |
52 | |
53 | *((uint64_t *)radeon_sa_bo_cpu_addr(sa_bo: (*semaphore)->sa_bo)) = 0; |
54 | |
55 | return 0; |
56 | } |
57 | |
58 | bool radeon_semaphore_emit_signal(struct radeon_device *rdev, int ridx, |
59 | struct radeon_semaphore *semaphore) |
60 | { |
61 | struct radeon_ring *ring = &rdev->ring[ridx]; |
62 | |
63 | trace_radeon_semaphore_signale(ring: ridx, sem: semaphore); |
64 | |
65 | if (radeon_semaphore_ring_emit(rdev, ridx, ring, semaphore, false)) { |
66 | --semaphore->waiters; |
67 | |
68 | /* for debugging lockup only, used by sysfs debug files */ |
69 | ring->last_semaphore_signal_addr = semaphore->gpu_addr; |
70 | return true; |
71 | } |
72 | return false; |
73 | } |
74 | |
75 | bool radeon_semaphore_emit_wait(struct radeon_device *rdev, int ridx, |
76 | struct radeon_semaphore *semaphore) |
77 | { |
78 | struct radeon_ring *ring = &rdev->ring[ridx]; |
79 | |
80 | trace_radeon_semaphore_wait(ring: ridx, sem: semaphore); |
81 | |
82 | if (radeon_semaphore_ring_emit(rdev, ridx, ring, semaphore, true)) { |
83 | ++semaphore->waiters; |
84 | |
85 | /* for debugging lockup only, used by sysfs debug files */ |
86 | ring->last_semaphore_wait_addr = semaphore->gpu_addr; |
87 | return true; |
88 | } |
89 | return false; |
90 | } |
91 | |
92 | void radeon_semaphore_free(struct radeon_device *rdev, |
93 | struct radeon_semaphore **semaphore, |
94 | struct radeon_fence *fence) |
95 | { |
96 | if (semaphore == NULL || *semaphore == NULL) { |
97 | return; |
98 | } |
99 | if ((*semaphore)->waiters > 0) { |
100 | dev_err(rdev->dev, "semaphore %p has more waiters than signalers," |
101 | " hardware lockup imminent!\n" , *semaphore); |
102 | } |
103 | radeon_sa_bo_free(sa_bo: &(*semaphore)->sa_bo, fence); |
104 | kfree(objp: *semaphore); |
105 | *semaphore = NULL; |
106 | } |
107 | |