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| Rev | Author | Line No. | Line |
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| 2997 | Serge | 1 | /* |
| 2 | * Copyright 2011 Christian König. |
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| 3 | * All Rights Reserved. |
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| 4 | * |
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| 5 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 6 | * copy of this software and associated documentation files (the |
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| 7 | * "Software"), to deal in the Software without restriction, including |
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| 8 | * without limitation the rights to use, copy, modify, merge, publish, |
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| 9 | * distribute, sub license, and/or sell copies of the Software, and to |
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| 10 | * permit persons to whom the Software is furnished to do so, subject to |
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| 11 | * the following conditions: |
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| 12 | * |
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| 13 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 14 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 15 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
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| 16 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, |
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| 17 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
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| 18 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
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| 19 | * USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 20 | * |
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| 21 | * The above copyright notice and this permission notice (including the |
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| 22 | * next paragraph) shall be included in all copies or substantial portions |
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| 23 | * of the Software. |
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| 24 | * |
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| 25 | */ |
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| 26 | /* |
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| 27 | * Authors: |
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| 28 | * Christian König |
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| 29 | */ |
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| 30 | #include |
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| 31 | #include "radeon.h" |
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| 32 | |||
| 33 | |||
| 34 | int radeon_semaphore_create(struct radeon_device *rdev, |
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| 35 | struct radeon_semaphore **semaphore) |
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| 36 | { |
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| 37 | int r; |
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| 38 | |||
| 39 | *semaphore = kmalloc(sizeof(struct radeon_semaphore), GFP_KERNEL); |
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| 40 | if (*semaphore == NULL) { |
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| 41 | return -ENOMEM; |
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| 42 | } |
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| 43 | r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo, |
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| 44 | &(*semaphore)->sa_bo, 8, 8, true); |
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| 45 | if (r) { |
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| 46 | kfree(*semaphore); |
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| 47 | *semaphore = NULL; |
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| 48 | return r; |
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| 49 | } |
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| 50 | (*semaphore)->waiters = 0; |
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| 51 | (*semaphore)->gpu_addr = radeon_sa_bo_gpu_addr((*semaphore)->sa_bo); |
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| 52 | *((uint64_t*)radeon_sa_bo_cpu_addr((*semaphore)->sa_bo)) = 0; |
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| 53 | return 0; |
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| 54 | } |
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| 55 | |||
| 56 | void radeon_semaphore_emit_signal(struct radeon_device *rdev, int ring, |
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| 57 | struct radeon_semaphore *semaphore) |
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| 58 | { |
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| 59 | --semaphore->waiters; |
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| 60 | radeon_semaphore_ring_emit(rdev, ring, &rdev->ring[ring], semaphore, false); |
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| 61 | } |
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| 62 | |||
| 63 | void radeon_semaphore_emit_wait(struct radeon_device *rdev, int ring, |
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| 64 | struct radeon_semaphore *semaphore) |
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| 65 | { |
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| 66 | ++semaphore->waiters; |
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| 67 | radeon_semaphore_ring_emit(rdev, ring, &rdev->ring[ring], semaphore, true); |
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| 68 | } |
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| 69 | |||
| 70 | /* caller must hold ring lock */ |
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| 71 | int radeon_semaphore_sync_rings(struct radeon_device *rdev, |
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| 72 | struct radeon_semaphore *semaphore, |
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| 73 | int signaler, int waiter) |
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| 74 | { |
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| 75 | int r; |
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| 76 | |||
| 77 | /* no need to signal and wait on the same ring */ |
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| 78 | if (signaler == waiter) { |
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| 79 | return 0; |
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| 80 | } |
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| 81 | |||
| 82 | /* prevent GPU deadlocks */ |
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| 83 | if (!rdev->ring[signaler].ready) { |
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| 84 | dev_err(rdev->dev, "Trying to sync to a disabled ring!"); |
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| 85 | return -EINVAL; |
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| 86 | } |
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| 87 | |||
| 88 | r = radeon_ring_alloc(rdev, &rdev->ring[signaler], 8); |
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| 89 | if (r) { |
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| 90 | return r; |
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| 91 | } |
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| 92 | radeon_semaphore_emit_signal(rdev, signaler, semaphore); |
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| 93 | radeon_ring_commit(rdev, &rdev->ring[signaler]); |
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| 94 | |||
| 95 | /* we assume caller has already allocated space on waiters ring */ |
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| 96 | radeon_semaphore_emit_wait(rdev, waiter, semaphore); |
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| 97 | |||
| 3764 | Serge | 98 | /* for debugging lockup only, used by sysfs debug files */ |
| 99 | rdev->ring[signaler].last_semaphore_signal_addr = semaphore->gpu_addr; |
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| 100 | rdev->ring[waiter].last_semaphore_wait_addr = semaphore->gpu_addr; |
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| 101 | |||
| 2997 | Serge | 102 | return 0; |
| 103 | } |
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| 104 | |||
| 105 | void radeon_semaphore_free(struct radeon_device *rdev, |
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| 106 | struct radeon_semaphore **semaphore, |
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| 107 | struct radeon_fence *fence) |
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| 108 | { |
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| 109 | if (semaphore == NULL || *semaphore == NULL) { |
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| 110 | return; |
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| 111 | } |
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| 112 | if ((*semaphore)->waiters > 0) { |
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| 113 | dev_err(rdev->dev, "semaphore %p has more waiters than signalers," |
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| 114 | " hardware lockup imminent!\n", *semaphore); |
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| 115 | } |
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| 116 | radeon_sa_bo_free(rdev, &(*semaphore)->sa_bo, fence); |
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| 117 | kfree(*semaphore); |
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| 118 | *semaphore = NULL; |
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| 119 | } |