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 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 /*
31 * Authors:
32 * Christian König <deathsimple@vodafone.de>
33 */
34 #include <dev/drm2/drmP.h>
35 #include "radeon.h"
36
37
radeon_semaphore_create(struct radeon_device * rdev,struct radeon_semaphore ** semaphore)38 int radeon_semaphore_create(struct radeon_device *rdev,
39 struct radeon_semaphore **semaphore)
40 {
41 int r;
42
43 *semaphore = malloc(sizeof(struct radeon_semaphore),
44 DRM_MEM_DRIVER, M_NOWAIT);
45 if (*semaphore == NULL) {
46 return -ENOMEM;
47 }
48 r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo,
49 &(*semaphore)->sa_bo, 8, 8, true);
50 if (r) {
51 free(*semaphore, DRM_MEM_DRIVER);
52 *semaphore = NULL;
53 return r;
54 }
55 (*semaphore)->waiters = 0;
56 (*semaphore)->gpu_addr = radeon_sa_bo_gpu_addr((*semaphore)->sa_bo);
57 *((uint64_t*)radeon_sa_bo_cpu_addr((*semaphore)->sa_bo)) = 0;
58 return 0;
59 }
60
radeon_semaphore_emit_signal(struct radeon_device * rdev,int ring,struct radeon_semaphore * semaphore)61 void radeon_semaphore_emit_signal(struct radeon_device *rdev, int ring,
62 struct radeon_semaphore *semaphore)
63 {
64 --semaphore->waiters;
65 radeon_semaphore_ring_emit(rdev, ring, &rdev->ring[ring], semaphore, false);
66 }
67
radeon_semaphore_emit_wait(struct radeon_device * rdev,int ring,struct radeon_semaphore * semaphore)68 void radeon_semaphore_emit_wait(struct radeon_device *rdev, int ring,
69 struct radeon_semaphore *semaphore)
70 {
71 ++semaphore->waiters;
72 radeon_semaphore_ring_emit(rdev, ring, &rdev->ring[ring], semaphore, true);
73 }
74
75 /* caller must hold ring lock */
radeon_semaphore_sync_rings(struct radeon_device * rdev,struct radeon_semaphore * semaphore,int signaler,int waiter)76 int radeon_semaphore_sync_rings(struct radeon_device *rdev,
77 struct radeon_semaphore *semaphore,
78 int signaler, int waiter)
79 {
80 int r;
81
82 /* no need to signal and wait on the same ring */
83 if (signaler == waiter) {
84 return 0;
85 }
86
87 /* prevent GPU deadlocks */
88 if (!rdev->ring[signaler].ready) {
89 dev_err(rdev->dev, "Trying to sync to a disabled ring!");
90 return -EINVAL;
91 }
92
93 r = radeon_ring_alloc(rdev, &rdev->ring[signaler], 8);
94 if (r) {
95 return r;
96 }
97 radeon_semaphore_emit_signal(rdev, signaler, semaphore);
98 radeon_ring_commit(rdev, &rdev->ring[signaler]);
99
100 /* we assume caller has already allocated space on waiters ring */
101 radeon_semaphore_emit_wait(rdev, waiter, semaphore);
102
103 /* for debugging lockup only, used by sysfs debug files */
104 rdev->ring[signaler].last_semaphore_signal_addr = semaphore->gpu_addr;
105 rdev->ring[waiter].last_semaphore_wait_addr = semaphore->gpu_addr;
106
107 return 0;
108 }
109
radeon_semaphore_free(struct radeon_device * rdev,struct radeon_semaphore ** semaphore,struct radeon_fence * fence)110 void radeon_semaphore_free(struct radeon_device *rdev,
111 struct radeon_semaphore **semaphore,
112 struct radeon_fence *fence)
113 {
114 if (semaphore == NULL || *semaphore == NULL) {
115 return;
116 }
117 if ((*semaphore)->waiters > 0) {
118 dev_err(rdev->dev, "semaphore %p has more waiters than signalers,"
119 " hardware lockup imminent!\n", *semaphore);
120 }
121 radeon_sa_bo_free(rdev, &(*semaphore)->sa_bo, fence);
122 free(*semaphore, DRM_MEM_DRIVER);
123 *semaphore = NULL;
124 }
125