| /* |
| * Copyright 2011 Christian König. |
| * All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sub license, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, |
| * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
| * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
| * USE OR OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * The above copyright notice and this permission notice (including the |
| * next paragraph) shall be included in all copies or substantial portions |
| * of the Software. |
| * |
| */ |
| /* |
| * Authors: |
| * Christian König <deathsimple@vodafone.de> |
| */ |
| #include <drm/drmP.h> |
| #include "amdgpu.h" |
| #include "amdgpu_trace.h" |
| |
| int amdgpu_semaphore_create(struct amdgpu_device *adev, |
| struct amdgpu_semaphore **semaphore) |
| { |
| int r; |
| |
| *semaphore = kmalloc(sizeof(struct amdgpu_semaphore), GFP_KERNEL); |
| if (*semaphore == NULL) { |
| return -ENOMEM; |
| } |
| r = amdgpu_sa_bo_new(&adev->ring_tmp_bo, |
| &(*semaphore)->sa_bo, 8, 8); |
| if (r) { |
| kfree(*semaphore); |
| *semaphore = NULL; |
| return r; |
| } |
| (*semaphore)->waiters = 0; |
| (*semaphore)->gpu_addr = amdgpu_sa_bo_gpu_addr((*semaphore)->sa_bo); |
| |
| *((uint64_t *)amdgpu_sa_bo_cpu_addr((*semaphore)->sa_bo)) = 0; |
| |
| return 0; |
| } |
| |
| bool amdgpu_semaphore_emit_signal(struct amdgpu_ring *ring, |
| struct amdgpu_semaphore *semaphore) |
| { |
| trace_amdgpu_semaphore_signale(ring->idx, semaphore); |
| |
| if (amdgpu_ring_emit_semaphore(ring, semaphore, false)) { |
| --semaphore->waiters; |
| |
| /* for debugging lockup only, used by sysfs debug files */ |
| ring->last_semaphore_signal_addr = semaphore->gpu_addr; |
| return true; |
| } |
| return false; |
| } |
| |
| bool amdgpu_semaphore_emit_wait(struct amdgpu_ring *ring, |
| struct amdgpu_semaphore *semaphore) |
| { |
| trace_amdgpu_semaphore_wait(ring->idx, semaphore); |
| |
| if (amdgpu_ring_emit_semaphore(ring, semaphore, true)) { |
| ++semaphore->waiters; |
| |
| /* for debugging lockup only, used by sysfs debug files */ |
| ring->last_semaphore_wait_addr = semaphore->gpu_addr; |
| return true; |
| } |
| return false; |
| } |
| |
| void amdgpu_semaphore_free(struct amdgpu_device *adev, |
| struct amdgpu_semaphore **semaphore, |
| struct fence *fence) |
| { |
| if (semaphore == NULL || *semaphore == NULL) { |
| return; |
| } |
| if ((*semaphore)->waiters > 0) { |
| dev_err(adev->dev, "semaphore %p has more waiters than signalers," |
| " hardware lockup imminent!\n", *semaphore); |
| } |
| amdgpu_sa_bo_free(adev, &(*semaphore)->sa_bo, fence); |
| kfree(*semaphore); |
| *semaphore = NULL; |
| } |