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 "radeon.h"
32 #ifdef TRACE_TODO
33 #include "radeon_trace.h"
34 #endif
35
radeon_semaphore_create(struct radeon_device * rdev,struct radeon_semaphore ** semaphore)36 int radeon_semaphore_create(struct radeon_device *rdev,
37 struct radeon_semaphore **semaphore)
38 {
39 int r;
40
41 *semaphore = kmalloc(sizeof(struct radeon_semaphore), M_DRM, GFP_KERNEL);
42 if (*semaphore == NULL) {
43 return -ENOMEM;
44 }
45 r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo,
46 &(*semaphore)->sa_bo, 8, 8);
47 if (r) {
48 kfree(*semaphore);
49 *semaphore = NULL;
50 return r;
51 }
52 (*semaphore)->waiters = 0;
53 (*semaphore)->gpu_addr = radeon_sa_bo_gpu_addr((*semaphore)->sa_bo);
54
55 *((uint64_t *)radeon_sa_bo_cpu_addr((*semaphore)->sa_bo)) = 0;
56
57 return 0;
58 }
59
radeon_semaphore_emit_signal(struct radeon_device * rdev,int ridx,struct radeon_semaphore * semaphore)60 bool radeon_semaphore_emit_signal(struct radeon_device *rdev, int ridx,
61 struct radeon_semaphore *semaphore)
62 {
63 struct radeon_ring *ring = &rdev->ring[ridx];
64
65 #ifdef TRACE_TODO
66 trace_radeon_semaphore_signale(ridx, semaphore);
67 #endif
68
69 if (radeon_semaphore_ring_emit(rdev, ridx, ring, semaphore, false)) {
70 --semaphore->waiters;
71
72 /* for debugging lockup only, used by sysfs debug files */
73 ring->last_semaphore_signal_addr = semaphore->gpu_addr;
74 return true;
75 }
76 return false;
77 }
78
radeon_semaphore_emit_wait(struct radeon_device * rdev,int ridx,struct radeon_semaphore * semaphore)79 bool radeon_semaphore_emit_wait(struct radeon_device *rdev, int ridx,
80 struct radeon_semaphore *semaphore)
81 {
82 struct radeon_ring *ring = &rdev->ring[ridx];
83
84 #ifdef TRACE_TODO
85 trace_radeon_semaphore_wait(ridx, semaphore);
86 #endif
87
88 if (radeon_semaphore_ring_emit(rdev, ridx, ring, semaphore, true)) {
89 ++semaphore->waiters;
90
91 /* for debugging lockup only, used by sysfs debug files */
92 ring->last_semaphore_wait_addr = semaphore->gpu_addr;
93 return true;
94 }
95 return false;
96 }
97
radeon_semaphore_free(struct radeon_device * rdev,struct radeon_semaphore ** semaphore,struct radeon_fence * fence)98 void radeon_semaphore_free(struct radeon_device *rdev,
99 struct radeon_semaphore **semaphore,
100 struct radeon_fence *fence)
101 {
102 if (semaphore == NULL || *semaphore == NULL) {
103 return;
104 }
105 if ((*semaphore)->waiters > 0) {
106 dev_err(rdev->dev, "semaphore %p has more waiters than signalers,"
107 " hardware lockup imminent!\n", *semaphore);
108 }
109 radeon_sa_bo_free(rdev, &(*semaphore)->sa_bo, fence);
110 kfree(*semaphore);
111 *semaphore = NULL;
112 }
113