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2997 Serge 1
/*
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 * Copyright 2011 Christian König.
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 * All Rights Reserved.
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a
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 * copy of this software and associated documentation files (the
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 * "Software"), to deal in the Software without restriction, including
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 * without limitation the rights to use, copy, modify, merge, publish,
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 * distribute, sub license, and/or sell copies of the Software, and to
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 * permit persons to whom the Software is furnished to do so, subject to
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 * the following conditions:
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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 * USE OR OTHER DEALINGS IN THE SOFTWARE.
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 *
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 * The above copyright notice and this permission notice (including the
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 * next paragraph) shall be included in all copies or substantial portions
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 * of the Software.
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 *
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 */
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/*
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 * Authors:
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 *    Christian König 
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 */
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#include 
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#include "radeon.h"
5078 serge 32
#include "radeon_trace.h"
2997 Serge 33
 
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int radeon_semaphore_create(struct radeon_device *rdev,
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			    struct radeon_semaphore **semaphore)
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{
5271 serge 37
	int r;
2997 Serge 38
 
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	*semaphore = kmalloc(sizeof(struct radeon_semaphore), GFP_KERNEL);
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	if (*semaphore == NULL) {
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		return -ENOMEM;
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	}
5271 serge 43
	r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo,
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			     &(*semaphore)->sa_bo, 8, 8);
2997 Serge 45
	if (r) {
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		kfree(*semaphore);
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		*semaphore = NULL;
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		return r;
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	}
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	(*semaphore)->waiters = 0;
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	(*semaphore)->gpu_addr = radeon_sa_bo_gpu_addr((*semaphore)->sa_bo);
5078 serge 52
 
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	*((uint64_t *)radeon_sa_bo_cpu_addr((*semaphore)->sa_bo)) = 0;
5078 serge 54
 
2997 Serge 55
	return 0;
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}
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5078 serge 58
bool radeon_semaphore_emit_signal(struct radeon_device *rdev, int ridx,
2997 Serge 59
			          struct radeon_semaphore *semaphore)
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{
5078 serge 61
	struct radeon_ring *ring = &rdev->ring[ridx];
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	trace_radeon_semaphore_signale(ridx, semaphore);
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	if (radeon_semaphore_ring_emit(rdev, ridx, ring, semaphore, false)) {
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		--semaphore->waiters;
5078 serge 67
 
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		/* for debugging lockup only, used by sysfs debug files */
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		ring->last_semaphore_signal_addr = semaphore->gpu_addr;
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		return true;
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	}
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	return false;
2997 Serge 73
}
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5078 serge 75
bool radeon_semaphore_emit_wait(struct radeon_device *rdev, int ridx,
2997 Serge 76
			        struct radeon_semaphore *semaphore)
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{
5078 serge 78
	struct radeon_ring *ring = &rdev->ring[ridx];
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	trace_radeon_semaphore_wait(ridx, semaphore);
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	if (radeon_semaphore_ring_emit(rdev, ridx, ring, semaphore, true)) {
6104 serge 83
		++semaphore->waiters;
5078 serge 84
 
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		/* for debugging lockup only, used by sysfs debug files */
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		ring->last_semaphore_wait_addr = semaphore->gpu_addr;
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		return true;
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	}
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	return false;
2997 Serge 90
}
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void radeon_semaphore_free(struct radeon_device *rdev,
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			   struct radeon_semaphore **semaphore,
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			   struct radeon_fence *fence)
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{
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	if (semaphore == NULL || *semaphore == NULL) {
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		return;
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	}
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	if ((*semaphore)->waiters > 0) {
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		dev_err(rdev->dev, "semaphore %p has more waiters than signalers,"
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			" hardware lockup imminent!\n", *semaphore);
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	}
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	radeon_sa_bo_free(rdev, &(*semaphore)->sa_bo, fence);
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	kfree(*semaphore);
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	*semaphore = NULL;
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}