Release 4.7 drivers/gpu/drm/ttm/ttm_bo_manager.c

/**************************************************************************
 *
 * Copyright (c) 2007-2010 VMware, Inc., Palo Alto, CA., USA
 * 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 above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * 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.
 *
 **************************************************************************/
/*
 * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
 */

#include <drm/ttm/ttm_module.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/drm_mm.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/module.h>

/**
 * Currently we use a spinlock for the lock, but a mutex *may* be
 * more appropriate to reduce scheduling latency if the range manager
 * ends up with very fragmented allocation patterns.
 */


struct ttm_range_manager {
	
struct drm_mm mm;
	
spinlock_t lock;
};



static int ttm_bo_man_get_node(struct ttm_mem_type_manager *man,
			       struct ttm_buffer_object *bo,
			       const struct ttm_place *place,
			       struct ttm_mem_reg *mem)
{
	struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv;
	struct drm_mm *mm = &rman->mm;
	struct drm_mm_node *node = NULL;
	enum drm_mm_search_flags sflags = DRM_MM_SEARCH_BEST;
	enum drm_mm_allocator_flags aflags = DRM_MM_CREATE_DEFAULT;
	unsigned long lpfn;
	int ret;

	lpfn = place->lpfn;
	if (!lpfn)
		lpfn = man->size;

	node = kzalloc(sizeof(*node), GFP_KERNEL);
	if (!node)
		return -ENOMEM;

	if (place->flags & TTM_PL_FLAG_TOPDOWN) {
		sflags = DRM_MM_SEARCH_BELOW;
		aflags = DRM_MM_CREATE_TOP;
	}

	spin_lock(&rman->lock);
	ret = drm_mm_insert_node_in_range_generic(mm, node, mem->num_pages,
					  mem->page_alignment, 0,
					  place->fpfn, lpfn,
					  sflags, aflags);
	spin_unlock(&rman->lock);

	if (unlikely(ret)) {
		kfree(node);
	} else {
		mem->mm_node = node;
		mem->start = node->start;
	}

	return 0;
}

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ben skeggs
ben skeggs
129
60.56%
1
12.50%
david herrmann
david herrmann
27
12.68%
1
12.50%
lauri kasanen
lauri kasanen
20
9.39%
1
12.50%
thomas hellstrom
thomas hellstrom
15
7.04%
1
12.50%
michel danzer
michel danzer
13
6.10%
2
25.00%
christian koenig
christian koenig
9
4.23%
2
25.00%
Total
213
100.00%
8
100.00%



static void ttm_bo_man_put_node(struct ttm_mem_type_manager *man,
				struct ttm_mem_reg *mem)
{
	struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv;

	if (mem->mm_node) {
		spin_lock(&rman->lock);
		drm_mm_remove_node(mem->mm_node);
		spin_unlock(&rman->lock);

		kfree(mem->mm_node);
		mem->mm_node = NULL;
	}
}

Contributors
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CommitProp
ben skeggs
ben skeggs
54
72.97%
1
33.33%
thomas hellstrom
thomas hellstrom
12
16.22%
1
33.33%
david herrmann
david herrmann
8
10.81%
1
33.33%
Total
74
100.00%
3
100.00%



static int ttm_bo_man_init(struct ttm_mem_type_manager *man,
			   unsigned long p_size)
{
	struct ttm_range_manager *rman;

	rman = kzalloc(sizeof(*rman), GFP_KERNEL);
	if (!rman)
		return -ENOMEM;

	drm_mm_init(&rman->mm, 0, p_size);
	spin_lock_init(&rman->lock);
	man->priv = rman;
	return 0;
}

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ben skeggs
ben skeggs
54
76.06%
1
50.00%
thomas hellstrom
thomas hellstrom
17
23.94%
1
50.00%
Total
71
100.00%
2
100.00%



static int ttm_bo_man_takedown(struct ttm_mem_type_manager *man)
{
	struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv;
	struct drm_mm *mm = &rman->mm;

	spin_lock(&rman->lock);
	if (drm_mm_clean(mm)) {
		drm_mm_takedown(mm);
		spin_unlock(&rman->lock);
		kfree(rman);
		man->priv = NULL;
		return 0;
	}
	spin_unlock(&rman->lock);
	return -EBUSY;
}

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CommitProp
ben skeggs
ben skeggs
62
68.13%
1
50.00%
thomas hellstrom
thomas hellstrom
29
31.87%
1
50.00%
Total
91
100.00%
2
100.00%



static void ttm_bo_man_debug(struct ttm_mem_type_manager *man,
			     const char *prefix)
{
	struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv;

	spin_lock(&rman->lock);
	drm_mm_debug_table(&rman->mm, prefix);
	spin_unlock(&rman->lock);
}

Contributors
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ben skeggs
ben skeggs
42
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thomas hellstrom
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25.00%
1
50.00%
Total
56
100.00%
2
100.00%


const struct ttm_mem_type_manager_func ttm_bo_manager_func = {
	ttm_bo_man_init,
	ttm_bo_man_takedown,
	ttm_bo_man_get_node,
	ttm_bo_man_put_node,
	ttm_bo_man_debug
};

EXPORT_SYMBOL(ttm_bo_manager_func);
Overall Contributors
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CommitProp
ben skeggs
ben skeggs
380
67.50%
1
11.11%
thomas hellstrom
thomas hellstrom
102
18.12%
1
11.11%
david herrmann
david herrmann
35
6.22%
1
11.11%
lauri kasanen
lauri kasanen
20
3.55%
1
11.11%
michel danzer
michel danzer
13
2.31%
2
22.22%
christian koenig
christian koenig
9
1.60%
2
22.22%
david howells
david howells
4
0.71%
1
11.11%
Total
563
100.00%
9
100.00%
  
Directory: drivers/gpu/drm/ttm

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