[linux-2.6-block.git] / drivers / gpu / drm / radeon / radeon_semaphore.c

/*
 * 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 "radeon.h"
#include "radeon_trace.h"

int radeon_semaphore_create(struct radeon_device *rdev,
			    struct radeon_semaphore **semaphore)
{
	int r;

	*semaphore = kmalloc(sizeof(struct radeon_semaphore), GFP_KERNEL);
	if (*semaphore == NULL) {
		return -ENOMEM;
	}
	r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo,
			     &(*semaphore)->sa_bo, 8, 8);
	if (r) {
		kfree(*semaphore);
		*semaphore = NULL;
		return r;
	}
	(*semaphore)->waiters = 0;
	(*semaphore)->gpu_addr = radeon_sa_bo_gpu_addr((*semaphore)->sa_bo);

	*((uint64_t *)radeon_sa_bo_cpu_addr((*semaphore)->sa_bo)) = 0;

	return 0;
}

bool radeon_semaphore_emit_signal(struct radeon_device *rdev, int ridx,
				  struct radeon_semaphore *semaphore)
{
	struct radeon_ring *ring = &rdev->ring[ridx];

	trace_radeon_semaphore_signale(ridx, semaphore);

	if (radeon_semaphore_ring_emit(rdev, ridx, 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 radeon_semaphore_emit_wait(struct radeon_device *rdev, int ridx,
				struct radeon_semaphore *semaphore)
{
	struct radeon_ring *ring = &rdev->ring[ridx];

	trace_radeon_semaphore_wait(ridx, semaphore);

	if (radeon_semaphore_ring_emit(rdev, ridx, 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 radeon_semaphore_free(struct radeon_device *rdev,
			   struct radeon_semaphore **semaphore,
			   struct radeon_fence *fence)
{
	if (semaphore == NULL || *semaphore == NULL) {
		return;
	}
	if ((*semaphore)->waiters > 0) {
		dev_err(rdev->dev, "semaphore %p has more waiters than signalers,"
			" hardware lockup imminent!\n", *semaphore);
	}
	radeon_sa_bo_free(rdev, &(*semaphore)->sa_bo, fence);
	kfree(*semaphore);
	*semaphore = NULL;
}
Commit	Line	Data
15d3332f CK	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	* Authors:
	28	* Christian König <deathsimple@vodafone.de>
	29	*/
760285e7	30	#include <drm/drmP.h>
15d3332f	31	#include "radeon.h"
bd80c8ba	32	#include "radeon_trace.h"
15d3332f CK	33
	34	int radeon_semaphore_create(struct radeon_device *rdev,
	35	struct radeon_semaphore **semaphore)
	36	{
975700d2	37	int r;
15d3332f	38
a8c05940	39	*semaphore = kmalloc(sizeof(struct radeon_semaphore), GFP_KERNEL);
c1341e52	40	if (*semaphore == NULL) {
c1341e52 JG	41	return -ENOMEM;
c1341e52 JG	42	}
975700d2 CK	43	r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo,
975700d2 CK	44	&(*semaphore)->sa_bo, 8, 8);
a8c05940 JG	45	if (r) {
	46	kfree(*semaphore);
	47	*semaphore = NULL;
	48	return r;
	49	}
	50	(*semaphore)->waiters = 0;
	51	(semaphore)->gpu_addr = radeon_sa_bo_gpu_addr((semaphore)->sa_bo);
8f53492f	52
975700d2	53	((uint64_t )radeon_sa_bo_cpu_addr((*semaphore)->sa_bo)) = 0;
1654b817	54
15d3332f CK	55	return 0;
	56	}
	57
1654b817	58	bool radeon_semaphore_emit_signal(struct radeon_device *rdev, int ridx,
3cf8bb1a	59	struct radeon_semaphore *semaphore)
15d3332f	60	{
1654b817 CK	61	struct radeon_ring *ring = &rdev->ring[ridx];
	62
	63	trace_radeon_semaphore_signale(ridx, semaphore);
	64
	65	if (radeon_semaphore_ring_emit(rdev, ridx, ring, semaphore, false)) {
	66	--semaphore->waiters;
bd80c8ba	67
1654b817 CK	68	/* for debugging lockup only, used by sysfs debug files */
	69	ring->last_semaphore_signal_addr = semaphore->gpu_addr;
	70	return true;
	71	}
	72	return false;
15d3332f CK	73	}
15d3332f CK	74
1654b817	75	bool radeon_semaphore_emit_wait(struct radeon_device *rdev, int ridx,
3cf8bb1a	76	struct radeon_semaphore *semaphore)
15d3332f	77	{
1654b817 CK	78	struct radeon_ring *ring = &rdev->ring[ridx];
	79
	80	trace_radeon_semaphore_wait(ridx, semaphore);
	81
	82	if (radeon_semaphore_ring_emit(rdev, ridx, ring, semaphore, true)) {
	83	++semaphore->waiters;
bd80c8ba	84
1654b817 CK	85	/* for debugging lockup only, used by sysfs debug files */
	86	ring->last_semaphore_wait_addr = semaphore->gpu_addr;
	87	return true;
	88	}
	89	return false;
15d3332f CK	90	}
	91
	92	void radeon_semaphore_free(struct radeon_device *rdev,
220907d9	93	struct radeon_semaphore **semaphore,
a8c05940	94	struct radeon_fence *fence)
15d3332f	95	{
220907d9	96	if (semaphore == NULL \|\| *semaphore == NULL) {
a8c05940 JG	97	return;
a8c05940 JG	98	}
220907d9	99	if ((*semaphore)->waiters > 0) {
a8c05940	100	dev_err(rdev->dev, "semaphore %p has more waiters than signalers,"
220907d9	101	" hardware lockup imminent!\n", *semaphore);
15d3332f	102	}
220907d9 CK	103	radeon_sa_bo_free(rdev, &(*semaphore)->sa_bo, fence);
	104	kfree(*semaphore);
	105	*semaphore = NULL;
15d3332f	106	}