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/*
* 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, &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 amdgpu_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;
}
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