Release 4.17 drivers/gpu/drm/ttm/ttm_bo.c

/**************************************************************************
 *
 * Copyright (c) 2006-2009 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>
 */


#define pr_fmt(fmt) "[TTM] " fmt

#include <drm/ttm/ttm_module.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_placement.h>
#include <linux/jiffies.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/file.h>
#include <linux/module.h>
#include <linux/atomic.h>
#include <linux/reservation.h>

static void ttm_bo_global_kobj_release(struct kobject *kobj);


static struct attribute ttm_bo_count = {
	.name = "bo_count",
	.mode = S_IRUGO
};

/* default destructor */


static void ttm_bo_default_destroy(struct ttm_buffer_object *bo)
{
	kfree(bo);
}

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static inline int ttm_mem_type_from_place(const struct ttm_place *place,
					  uint32_t *mem_type)
{
	int pos;

	pos = ffs(place->flags & TTM_PL_MASK_MEM);
	if (unlikely(!pos))
		return -EINVAL;

	*mem_type = pos - 1;
	return 0;
}

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static void ttm_mem_type_debug(struct ttm_bo_device *bdev, int mem_type)
{
	struct ttm_mem_type_manager *man = &bdev->man[mem_type];
	struct drm_printer p = drm_debug_printer(TTM_PFX);

	pr_err("    has_type: %d\n", man->has_type);
	pr_err("    use_type: %d\n", man->use_type);
	pr_err("    flags: 0x%08X\n", man->flags);
	pr_err("    gpu_offset: 0x%08llX\n", man->gpu_offset);
	pr_err("    size: %llu\n", man->size);
	pr_err("    available_caching: 0x%08X\n", man->available_caching);
	pr_err("    default_caching: 0x%08X\n", man->default_caching);
	if (mem_type != TTM_PL_SYSTEM)
		(*man->func->debug)(man, &p);
}

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3
42.86%
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35
29.17%
1
14.29%
Christian König
11
9.17%
1
14.29%
Ben Skeggs
6
5.00%
1
14.29%
Alex Deucher
1
0.83%
1
14.29%
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120
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7
100.00%



static void ttm_bo_mem_space_debug(struct ttm_buffer_object *bo,
					struct ttm_placement *placement)
{
	int i, ret, mem_type;

	pr_err("No space for %p (%lu pages, %luK, %luM)\n",
	       bo, bo->mem.num_pages, bo->mem.size >> 10,
	       bo->mem.size >> 20);
	for (i = 0; i < placement->num_placement; i++) {
		ret = ttm_mem_type_from_place(&placement->placement[i],
						&mem_type);
		if (ret)
			return;
		pr_err("  placement[%d]=0x%08X (%d)\n",
		       i, placement->placement[i].flags, mem_type);
		ttm_mem_type_debug(bo->bdev, mem_type);
	}
}

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83
70.94%
3
60.00%
Joe Perches
30
25.64%
1
20.00%
Christian König
4
3.42%
1
20.00%
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117
100.00%
5
100.00%



static ssize_t ttm_bo_global_show(struct kobject *kobj,
				  struct attribute *attr,
				  char *buffer)
{
	struct ttm_bo_global *glob =
		container_of(kobj, struct ttm_bo_global, kobj);

	return snprintf(buffer, PAGE_SIZE, "%d\n",
				atomic_read(&glob->bo_count));
}

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52
98.11%
1
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Monk Liu
1
1.89%
1
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2
100.00%


static struct attribute *ttm_bo_global_attrs[] = {
	&ttm_bo_count,
	NULL
};


static const struct sysfs_ops ttm_bo_global_ops = {
	.show = &ttm_bo_global_show
};


static struct kobj_type ttm_bo_glob_kobj_type  = {
	.release = &ttm_bo_global_kobj_release,
	.sysfs_ops = &ttm_bo_global_ops,
	.default_attrs = ttm_bo_global_attrs
};




static inline uint32_t ttm_bo_type_flags(unsigned type)
{
	return 1 << (type);
}

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static void ttm_bo_release_list(struct kref *list_kref)
{
	struct ttm_buffer_object *bo =
	    container_of(list_kref, struct ttm_buffer_object, list_kref);
	struct ttm_bo_device *bdev = bo->bdev;
	size_t acc_size = bo->acc_size;

	BUG_ON(kref_read(&bo->list_kref));
	BUG_ON(kref_read(&bo->kref));
	BUG_ON(atomic_read(&bo->cpu_writers));
	BUG_ON(bo->mem.mm_node != NULL);
	BUG_ON(!list_empty(&bo->lru));
	BUG_ON(!list_empty(&bo->ddestroy));
	ttm_tt_destroy(bo->ttm);
	atomic_dec(&bo->bdev->glob->bo_count);
	dma_fence_put(bo->moving);
	reservation_object_fini(&bo->ttm_resv);
	mutex_destroy(&bo->wu_mutex);
	bo->destroy(bo);
	ttm_mem_global_free(bdev->glob->mem_glob, acc_size);
}

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Thomas Hellstrom
144
84.71%
3
33.33%
Christian König
8
4.71%
2
22.22%
Maarten Lankhorst
8
4.71%
1
11.11%
Jérôme Glisse
7
4.12%
1
11.11%
Peter Zijlstra
2
1.18%
1
11.11%
Chris Wilson
1
0.59%
1
11.11%
Total
170
100.00%
9
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void ttm_bo_add_to_lru(struct ttm_buffer_object *bo)
{
	struct ttm_bo_device *bdev = bo->bdev;
	struct ttm_mem_type_manager *man;

	reservation_object_assert_held(bo->resv);

	if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) {
		BUG_ON(!list_empty(&bo->lru));

		man = &bdev->man[bo->mem.mem_type];
		list_add_tail(&bo->lru, &man->lru[bo->priority]);
		kref_get(&bo->list_kref);

		if (bo->ttm && !(bo->ttm->page_flags &
				 (TTM_PAGE_FLAG_SG | TTM_PAGE_FLAG_SWAPPED))) {
			list_add_tail(&bo->swap,
				      &bdev->glob->swap_lru[bo->priority]);
			kref_get(&bo->list_kref);
		}
	}
}
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Thomas Hellstrom
92
61.74%
2
22.22%
Christian König
51
34.23%
5
55.56%
Felix Kuehling
4
2.68%
1
11.11%
Maarten Lankhorst
2
1.34%
1
11.11%
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149
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9
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EXPORT_SYMBOL(ttm_bo_add_to_lru);



static void ttm_bo_ref_bug(struct kref *list_kref)
{
	BUG();
}

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void ttm_bo_del_from_lru(struct ttm_buffer_object *bo)
{
	if (!list_empty(&bo->swap)) {
		list_del_init(&bo->swap);
		kref_put(&bo->list_kref, ttm_bo_ref_bug);
	}
	if (!list_empty(&bo->lru)) {
		list_del_init(&bo->lru);
		kref_put(&bo->list_kref, ttm_bo_ref_bug);
	}

	/*
         * TODO: Add a driver hook to delete from
         * driver-specific LRU's here.
         */
}

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Thomas Hellstrom
48
65.75%
1
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Peter Zijlstra
12
16.44%
1
20.00%
Dave Airlie
10
13.70%
1
20.00%
Christian König
2
2.74%
1
20.00%
Linus Torvalds
1
1.37%
1
20.00%
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73
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5
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void ttm_bo_del_sub_from_lru(struct ttm_buffer_object *bo)
{
	struct ttm_bo_global *glob = bo->bdev->glob;

	spin_lock(&glob->lru_lock);
	ttm_bo_del_from_lru(bo);
	spin_unlock(&glob->lru_lock);
}
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Thomas Hellstrom
23
54.76%
2
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Christian König
11
26.19%
1
20.00%
Maarten Lankhorst
8
19.05%
2
40.00%
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42
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5
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EXPORT_SYMBOL(ttm_bo_del_sub_from_lru);



void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo)
{
	reservation_object_assert_held(bo->resv);

	ttm_bo_del_from_lru(bo);
	ttm_bo_add_to_lru(bo);
}
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Flora Cui
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EXPORT_SYMBOL(ttm_bo_move_to_lru_tail);



static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
				  struct ttm_mem_reg *mem, bool evict,
				  struct ttm_operation_ctx *ctx)
{
	struct ttm_bo_device *bdev = bo->bdev;
	bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem);
	bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem);
	struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type];
	struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type];
	int ret = 0;

	if (old_is_pci || new_is_pci ||
	    ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) {
		ret = ttm_mem_io_lock(old_man, true);
		if (unlikely(ret != 0))
			goto out_err;
		ttm_bo_unmap_virtual_locked(bo);
		ttm_mem_io_unlock(old_man);
	}

	/*
         * Create and bind a ttm if required.
         */

	if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) {
		if (bo->ttm == NULL) {
			bool zero = !(old_man->flags & TTM_MEMTYPE_FLAG_FIXED);
			ret = ttm_tt_create(bo, zero);
			if (ret)
				goto out_err;
		}

		ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement);
		if (ret)
			goto out_err;

		if (mem->mem_type != TTM_PL_SYSTEM) {
			ret = ttm_tt_bind(bo->ttm, mem, ctx);
			if (ret)
				goto out_err;
		}

		if (bo->mem.mem_type == TTM_PL_SYSTEM) {
			if (bdev->driver->move_notify)
				bdev->driver->move_notify(bo, evict, mem);
			bo->mem = *mem;
			mem->mm_node = NULL;
			goto moved;
		}
	}

	if (bdev->driver->move_notify)
		bdev->driver->move_notify(bo, evict, mem);

	if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
	    !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED))
		ret = ttm_bo_move_ttm(bo, ctx, mem);
	else if (bdev->driver->move)
		ret = bdev->driver->move(bo, evict, ctx, mem);
	else
		ret = ttm_bo_move_memcpy(bo, ctx, mem);

	if (ret) {
		if (bdev->driver->move_notify) {
			struct ttm_mem_reg tmp_mem = *mem;
			*mem = bo->mem;
			bo->mem = tmp_mem;
			bdev->driver->move_notify(bo, false, mem);
			bo->mem = *mem;
			*mem = tmp_mem;
		}

		goto out_err;
	}

moved:
	if (bo->evicted) {
		if (bdev->driver->invalidate_caches) {
			ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement);
			if (ret)
				pr_err("Can not flush read caches\n");
		}
		bo->evicted = false;
	}

	if (bo->mem.mm_node)
		bo->offset = (bo->mem.start << PAGE_SHIFT) +
		    bdev->man[bo->mem.mem_type].gpu_offset;
	else
		bo->offset = 0;

	ctx->bytes_moved += bo->num_pages << PAGE_SHIFT;
	return 0;

out_err:
	new_man = &bdev->man[bo->mem.mem_type];
	if (new_man->flags & TTM_MEMTYPE_FLAG_FIXED) {
		ttm_tt_destroy(bo->ttm);
		bo->ttm = NULL;
	}

	return ret;
}

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90
14.90%
4
23.53%
Jérôme Glisse
19
3.15%
1
5.88%
Christian König
18
2.98%
3
17.65%
Rob Clark
10
1.66%
1
5.88%
Nicolai Hähnle
6
0.99%
1
5.88%
Dave Airlie
5
0.83%
1
5.88%
Joe Perches
2
0.33%
1
5.88%
Roger He
2
0.33%
1
5.88%
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604
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17
100.00%

/**
 * Call bo::reserved.
 * Will release GPU memory type usage on destruction.
 * This is the place to put in driver specific hooks to release
 * driver private resources.
 * Will release the bo::reserved lock.
 */



static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo)
{
	if (bo->bdev->driver->move_notify)
		bo->bdev->driver->move_notify(bo, false, NULL);

	ttm_tt_destroy(bo->ttm);
	bo->ttm = NULL;
	ttm_bo_mem_put(bo, &bo->mem);
}

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Thomas Hellstrom
35
59.32%
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40.00%
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19
32.20%
1
20.00%
Dave Airlie
3
5.08%
1
20.00%
Nicolai Hähnle
2
3.39%
1
20.00%
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59
100.00%
5
100.00%



static int ttm_bo_individualize_resv(struct ttm_buffer_object *bo)
{
	int r;

	if (bo->resv == &bo->ttm_resv)
		return 0;

	BUG_ON(!reservation_object_trylock(&bo->ttm_resv));

	r = reservation_object_copy_fences(&bo->ttm_resv, bo->resv);
	if (r)
		reservation_object_unlock(&bo->ttm_resv);

	return r;
}

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static void ttm_bo_flush_all_fences(struct ttm_buffer_object *bo)
{
	struct reservation_object_list *fobj;
	struct dma_fence *fence;
	int i;

	fobj = reservation_object_get_list(&bo->ttm_resv);
	fence = reservation_object_get_excl(&bo->ttm_resv);
	if (fence && !fence->ops->signaled)
		dma_fence_enable_sw_signaling(fence);

	for (i = 0; fobj && i < fobj->shared_count; ++i) {
		fence = rcu_dereference_protected(fobj->shared[i],
					reservation_object_held(bo->resv));

		if (!fence->ops->signaled)
			dma_fence_enable_sw_signaling(fence);
	}
}

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105
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33.33%
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4
3.57%
1
33.33%
Chris Wilson
3
2.68%
1
33.33%
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static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo)
{
	struct ttm_bo_device *bdev = bo->bdev;
	struct ttm_bo_global *glob = bdev->glob;
	int ret;

	ret = ttm_bo_individualize_resv(bo);
	if (ret) {
		/* Last resort, if we fail to allocate memory for the
                 * fences block for the BO to become idle
                 */
		reservation_object_wait_timeout_rcu(bo->resv, true, false,
						    30 * HZ);
		spin_lock(&glob->lru_lock);
		goto error;
	}

	spin_lock(&glob->lru_lock);
	ret = reservation_object_trylock(bo->resv) ? 0 : -EBUSY;
	if (!ret) {
		if (reservation_object_test_signaled_rcu(&bo->ttm_resv, true)) {
			ttm_bo_del_from_lru(bo);
			spin_unlock(&glob->lru_lock);
			if (bo->resv != &bo->ttm_resv)
				reservation_object_unlock(&bo->ttm_resv);

			ttm_bo_cleanup_memtype_use(bo);
			reservation_object_unlock(bo->resv);
			return;
		}

		ttm_bo_flush_all_fences(bo);

		/*
                 * Make NO_EVICT bos immediately available to
                 * shrinkers, now that they are queued for
                 * destruction.
                 */
		if (bo->mem.placement & TTM_PL_FLAG_NO_EVICT) {
			bo->mem.placement &= ~TTM_PL_FLAG_NO_EVICT;
			ttm_bo_add_to_lru(bo);
		}

		reservation_object_unlock(bo->resv);
	}
	if (bo->resv != &bo->ttm_resv)
		reservation_object_unlock(&bo->ttm_resv);

error:
	kref_get(&bo->list_kref);
	list_add_tail(&bo->ddestroy, &bdev->ddestroy);
	spin_unlock(&glob->lru_lock);

	schedule_delayed_work(&bdev->wq,
			      ((HZ / 100) < 1) ? 1 : HZ / 100);
}

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42.12%
6
37.50%
Maarten Lankhorst
40
14.65%
3
18.75%
Total
273
100.00%
16
100.00%

/**
 * function ttm_bo_cleanup_refs
 * If bo idle, remove from delayed- and lru lists, and unref.
 * If not idle, do nothing.
 *
 * Must be called with lru_lock and reservation held, this function
 * will drop the lru lock and optionally the reservation lock before returning.
 *
 * @interruptible         Any sleeps should occur interruptibly.
 * @no_wait_gpu           Never wait for gpu. Return -EBUSY instead.
 * @unlock_resv           Unlock the reservation lock as well.
 */



static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo,
			       bool interruptible, bool no_wait_gpu,
			       bool unlock_resv)
{
	struct ttm_bo_global *glob = bo->bdev->glob;
	struct reservation_object *resv;
	int ret;

	if (unlikely(list_empty(&bo->ddestroy)))
		resv = bo->resv;
	else
		resv = &bo->ttm_resv;

	if (reservation_object_test_signaled_rcu(resv, true))
		ret = 0;
	else
		ret = -EBUSY;

	if (ret && !no_wait_gpu) {
		long lret;

		if (unlock_resv)
			reservation_object_unlock(bo->resv);
		spin_unlock(&glob->lru_lock);

		lret = reservation_object_wait_timeout_rcu(resv, true,
							   interruptible,
							   30 * HZ);

		if (lret < 0)
			return lret;
		else if (lret == 0)
			return -EBUSY;

		spin_lock(&glob->lru_lock);
		if (unlock_resv && !reservation_object_trylock(bo->resv)) {
			/*
                         * We raced, and lost, someone else holds the reservation now,
                         * and is probably busy in ttm_bo_cleanup_memtype_use.
                         *
                         * Even if it's not the case, because we finished waiting any
                         * delayed destruction would succeed, so just return success
                         * here.
                         */
			spin_unlock(&glob->lru_lock);
			return 0;
		}
		ret = 0;
	}

	if (ret || unlikely(list_empty(&bo->ddestroy))) {
		if (unlock_resv)
			reservation_object_unlock(bo->resv);
		spin_unlock(&glob->lru_lock);
		return ret;
	}

	ttm_bo_del_from_lru(bo);
	list_del_init(&bo->ddestroy);
	kref_put(&bo->list_kref, ttm_bo_ref_bug);

	spin_unlock(&glob->lru_lock);
	ttm_bo_cleanup_memtype_use(bo);

	if (unlock_resv)
		reservation_object_unlock(bo->resv);

	return 0;
}

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31.29%
6
46.15%
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87
31.29%
3
23.08%
Peter Zijlstra
9
3.24%
1
7.69%
Total
278
100.00%
13
100.00%

/**
 * Traverse the delayed list, and call ttm_bo_cleanup_refs on all
 * encountered buffers.
 */


static bool ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all)
{
	struct ttm_bo_global *glob = bdev->glob;
	struct list_head removed;
	bool empty;

	INIT_LIST_HEAD(&removed);

	spin_lock(&glob->lru_lock);
	while (!list_empty(&bdev->ddestroy)) {
		struct ttm_buffer_object *bo;

		bo = list_first_entry(&bdev->ddestroy, struct ttm_buffer_object,
				      ddestroy);
		kref_get(&bo->list_kref);
		list_move_tail(&bo->ddestroy, &removed);

		if (remove_all || bo->resv != &bo->ttm_resv) {
			spin_unlock(&glob->lru_lock);
			reservation_object_lock(bo->resv, NULL);

			spin_lock(&glob->lru_lock);
			ttm_bo_cleanup_refs(bo, false, !remove_all, true);

		} else if (reservation_object_trylock(bo->resv)) {
			ttm_bo_cleanup_refs(bo, false, !remove_all, true);
		} else {
			spin_unlock(&glob->lru_lock);
		}

		kref_put(&bo->list_kref, ttm_bo_release_list);
		spin_lock(&glob->lru_lock);
	}
	list_splice_tail(&removed, &bdev->ddestroy);
	empty = list_empty(&bdev->ddestroy);
	spin_unlock(&glob->lru_lock);

	return empty;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christian König
100
42.92%
5
41.67%
Thomas Hellstrom
89
38.20%
3
25.00%
Maarten Lankhorst
25
10.73%
2
16.67%
Luca Barbieri
18
7.73%
1
8.33%
Martin Kepplinger
1
0.43%
1
8.33%
Total
233
100.00%
12
100.00%



static void ttm_bo_delayed_workqueue(struct work_struct *work)
{
	struct ttm_bo_device *bdev =
	    container_of(work, struct ttm_bo_device, wq.work);

	if (!ttm_bo_delayed_delete(bdev, false))
		schedule_delayed_work(&bdev->wq,
				      ((HZ / 100) < 1) ? 1 : HZ / 100);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
61
98.39%
1
50.00%
Christian König
1
1.61%
1
50.00%
Total
62
100.00%
2
100.00%



static void ttm_bo_release(struct kref *kref)
{
	struct ttm_buffer_object *bo =
	    container_of(kref, struct ttm_buffer_object, kref);
	struct ttm_bo_device *bdev = bo->bdev;
	struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type];

	drm_vma_offset_remove(&bdev->vma_manager, &bo->vma_node);
	ttm_mem_io_lock(man, false);
	ttm_mem_io_free_vm(bo);
	ttm_mem_io_unlock(man);
	ttm_bo_cleanup_refs_or_queue(bo);
	kref_put(&bo->list_kref, ttm_bo_release_list);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
94
96.91%
4
80.00%
David Herrmann
3
3.09%
1
20.00%
Total
97
100.00%
5
100.00%



void ttm_bo_unref(struct ttm_buffer_object **p_bo)
{
	struct ttm_buffer_object *bo = *p_bo;

	*p_bo = NULL;
	kref_put(&bo->kref, ttm_bo_release);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
34
100.00%
1
100.00%
Total
34
100.00%
1
100.00%

EXPORT_SYMBOL(ttm_bo_unref);



int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev)
{
	return cancel_delayed_work_sync(&bdev->wq);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Matthew Garrett
19
100.00%
1
100.00%
Total
19
100.00%
1
100.00%

EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue);



void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched)
{
	if (resched)
		schedule_delayed_work(&bdev->wq,
				      ((HZ / 100) < 1) ? 1 : HZ / 100);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Matthew Garrett
41
100.00%
1
100.00%
Total
41
100.00%
1
100.00%

EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue);



static int ttm_bo_evict(struct ttm_buffer_object *bo,
			struct ttm_operation_ctx *ctx)
{
	struct ttm_bo_device *bdev = bo->bdev;
	struct ttm_mem_reg evict_mem;
	struct ttm_placement placement;
	int ret = 0;

	reservation_object_assert_held(bo->resv);

	placement.num_placement = 0;
	placement.num_busy_placement = 0;
	bdev->driver->evict_flags(bo, &placement);

	if (!placement.num_placement && !placement.num_busy_placement) {
		ret = ttm_bo_pipeline_gutting(bo);
		if (ret)
			return ret;

		return ttm_tt_create(bo, false);
	}

	evict_mem = bo->mem;
	evict_mem.mm_node = NULL;
	evict_mem.bus.io_reserved_vm = false;
	evict_mem.bus.io_reserved_count = 0;

	ret = ttm_bo_mem_space(bo, &placement, &evict_mem, ctx);
	if (ret) {
		if (ret != -ERESTARTSYS) {
			pr_err("Failed to find memory space for buffer 0x%p eviction\n",
			       bo);
			ttm_bo_mem_space_debug(bo, &placement);
		}
		goto out;
	}

	ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, ctx);
	if (unlikely(ret)) {
		if (ret != -ERESTARTSYS)
			pr_err("Buffer eviction failed\n");
		ttm_bo_mem_put(bo, &evict_mem);
		goto out;
	}
	bo->evicted = true;
out:
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
124
52.10%
3
21.43%
Christian König
72
30.25%
5
35.71%
Jérôme Glisse
31
13.03%
3
21.43%
Joe Perches
6
2.52%
1
7.14%
Ben Skeggs
3
1.26%
1
7.14%
Maarten Lankhorst
2
0.84%
1
7.14%
Total
238
100.00%
14
100.00%



bool ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
			      const struct ttm_place *place)
{
	/* Don't evict this BO if it's outside of the
         * requested placement range
         */
	if (place->fpfn >= (bo->mem.start + bo->mem.size) ||
	    (place->lpfn && place->lpfn <= bo->mem.start))
		return false;

	return true;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Christian König
59
100.00%
1
100.00%
Total
59
100.00%
1
100.00%

EXPORT_SYMBOL(ttm_bo_eviction_valuable);

/**
 * Check the target bo is allowable to be evicted or swapout, including cases:
 *
 * a. if share same reservation object with ctx->resv, have assumption
 * reservation objects should already be locked, so not lock again and
 * return true directly when either the opreation allow_reserved_eviction
 * or the target bo already is in delayed free list;
 *
 * b. Otherwise, trylock it.
 */


static bool ttm_bo_evict_swapout_allowable(struct ttm_buffer_object *bo,
			struct ttm_operation_ctx *ctx, bool *locked)
{
	bool ret = false;

	*locked = false;
	if (bo->resv == ctx->resv) {
		reservation_object_assert_held(bo->resv);
		if (ctx->flags & TTM_OPT_FLAG_ALLOW_RES_EVICT
		    || !list_empty(&bo->ddestroy))
			ret = true;
	} else {
		*locked = reservation_object_trylock(bo->resv);
		ret = *locked;
	}

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Roger He
91
100.00%
2
100.00%
Total
91
100.00%
2
100.00%



static int ttm_mem_evict_first(struct ttm_bo_device *bdev,
			       uint32_t mem_type,
			       const struct ttm_place *place,
			       struct ttm_operation_ctx *ctx)
{
	struct ttm_bo_global *glob = bdev->glob;
	struct ttm_mem_type_manager *man = &bdev->man[mem_type];
	struct ttm_buffer_object *bo = NULL;
	bool locked = false;
	unsigned i;
	int ret;

	spin_lock(&glob->lru_lock);
	for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
		list_for_each_entry(bo, &man->lru[i], lru) {
			if (!ttm_bo_evict_swapout_allowable(bo, ctx, &locked))
				continue;

			if (place && !bdev->driver->eviction_valuable(bo,
								      place)) {
				if (locked)
					reservation_object_unlock(bo->resv);
				continue;
			}
			break;
		}

		/* If the inner loop terminated early, we have our candidate */
		if (&bo->lru != &man->lru[i])
			break;

		bo = NULL;
	}

	if (!bo) {
		spin_unlock(&glob->lru_lock);
		return -EBUSY;
	}

	kref_get(&bo->list_kref);

	if (!list_empty(&bo->ddestroy)) {
		ret = ttm_bo_cleanup_refs(bo, ctx->interruptible,
					  ctx->no_wait_gpu, locked);
		kref_put(&bo->list_kref, ttm_bo_release_list);
		return ret;
	}

	ttm_bo_del_from_lru(bo);
	spin_unlock(&glob->lru_lock);

	ret = ttm_bo_evict(bo, ctx);
	if (locked) {
		ttm_bo_unreserve(bo);
	} else {
		spin_lock(&glob->lru_lock);
		ttm_bo_add_to_lru(bo);
		spin_unlock(&glob->lru_lock);
	}

	kref_put(&bo->list_kref, ttm_bo_release_list);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
124
40.79%
4
23.53%
Christian König
114
37.50%
7
41.18%
Maarten Lankhorst
30
9.87%
2
11.76%
Michel Dänzer
22
7.24%
1
5.88%
Jérôme Glisse
8
2.63%
1
5.88%
Roger He
6
1.97%
2
11.76%
Total
304
100.00%
17
100.00%



void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem)
{
	struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type];

	if (mem->mm_node)
		(*man->func->put_node)(man, mem);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Ben Skeggs
33
63.46%
2
66.67%
Jérôme Glisse
19
36.54%
1
33.33%
Total
52
100.00%
3
100.00%

EXPORT_SYMBOL(ttm_bo_mem_put);

/**
 * Add the last move fence to the BO and reserve a new shared slot.
 */


static int ttm_bo_add_move_fence(struct ttm_buffer_object *bo,
				 struct ttm_mem_type_manager *man,
				 struct ttm_mem_reg *mem)
{
	struct dma_fence *fence;
	int ret;

	spin_lock(&man->move_lock);
	fence = dma_fence_get(man->move);
	spin_unlock(&man->move_lock);

	if (fence) {
		reservation_object_add_shared_fence(bo->resv, fence);

		ret = reservation_object_reserve_shared(bo->resv);
		if (unlikely(ret))
			return ret;

		dma_fence_put(bo->moving);
		bo->moving = fence;
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christian König
101
97.12%
1
50.00%
Chris Wilson
3
2.88%
1
50.00%
Total
104
100.00%
2
100.00%

/**
 * Repeatedly evict memory from the LRU for @mem_type until we create enough
 * space, or we've evicted everything and there isn't enough space.
 */


static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo,
					uint32_t mem_type,
					const struct ttm_place *place,
					struct ttm_mem_reg *mem,
					struct ttm_operation_ctx *ctx)
{
	struct ttm_bo_device *bdev = bo->bdev;
	struct ttm_mem_type_manager *man = &bdev->man[mem_type];
	int ret;

	do {
		ret = (*man->func->get_node)(man, bo, place, mem);
		if (unlikely(ret != 0))
			return ret;
		if (mem->mm_node)
			break;
		ret = ttm_mem_evict_first(bdev, mem_type, place, ctx);
		if (unlikely(ret != 0))
			return ret;
	} while (1);
	mem->mem_type = mem_type;
	return ttm_bo_add_move_fence(bo, man, mem);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jérôme Glisse
93
65.03%
1
12.50%
Christian König
18
12.59%
4
50.00%
Thomas Hellstrom
17
11.89%
1
12.50%
Ben Skeggs
13
9.09%
1
12.50%
Michel Dänzer
2
1.40%
1
12.50%
Total
143
100.00%
8
100.00%



static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man,
				      uint32_t cur_placement,
				      uint32_t proposed_placement)
{
	uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING;
	uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING;

	/**
         * Keep current caching if possible.
         */

	if ((cur_placement & caching) != 0)
		result |= (cur_placement & caching);
	else if ((man->default_caching & caching) != 0)
		result |= man->default_caching;
	else if ((TTM_PL_FLAG_CACHED & caching) != 0)
		result |= TTM_PL_FLAG_CACHED;
	else if ((TTM_PL_FLAG_WC & caching) != 0)
		result |= TTM_PL_FLAG_WC;
	else if ((TTM_PL_FLAG_UNCACHED & caching) != 0)
		result |= TTM_PL_FLAG_UNCACHED;

	return result;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
118
100.00%
1
100.00%
Total
118
100.00%
1
100.00%



static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man,
				 uint32_t mem_type,
				 const struct ttm_place *place,
				 uint32_t *masked_placement)
{
	uint32_t cur_flags = ttm_bo_type_flags(mem_type);

	if ((cur_flags & place->flags & TTM_PL_MASK_MEM) == 0)
		return false;

	if ((place->flags & man->available_caching) == 0)
		return false;

	cur_flags |= (place->flags & man->available_caching);

	*masked_placement = cur_flags;
	return true;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
72
83.72%
2
66.67%
Christian König
14
16.28%
1
33.33%
Total
86
100.00%
3
100.00%

/**
 * Creates space for memory region @mem according to its type.
 *
 * This function first searches for free space in compatible memory types in
 * the priority order defined by the driver.  If free space isn't found, then
 * ttm_bo_mem_force_space is attempted in priority order to evict and find
 * space.
 */


int ttm_bo_mem_space(struct ttm_buffer_object *bo,
			struct ttm_placement *placement,
			struct ttm_mem_reg *mem,
			struct ttm_operation_ctx *ctx)
{
	struct ttm_bo_device *bdev = bo->bdev;
	struct ttm_mem_type_manager *man;
	uint32_t mem_type = TTM_PL_SYSTEM;
	uint32_t cur_flags = 0;
	bool type_found = false;
	bool type_ok = false;
	bool has_erestartsys = false;
	int i, ret;

	ret = reservation_object_reserve_shared(bo->resv);
	if (unlikely(ret))
		return ret;

	mem->mm_node = NULL;
	for (i = 0; i < placement->num_placement; ++i) {
		const struct ttm_place *place = &placement->placement[i];

		ret = ttm_mem_type_from_place(place, &mem_type);
		if (ret)
			return ret;
		man = &bdev->man[mem_type];
		if (!man->has_type || !man->use_type)
			continue;

		type_ok = ttm_bo_mt_compatible(man, mem_type, place,
						&cur_flags);

		if (!type_ok)
			continue;

		type_found = true;
		cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
						  cur_flags);
		/*
                 * Use the access and other non-mapping-related flag bits from
                 * the memory placement flags to the current flags
                 */
		ttm_flag_masked(&cur_flags, place->flags,
				~TTM_PL_MASK_MEMTYPE);

		if (mem_type == TTM_PL_SYSTEM)
			break;

		ret = (*man->func->get_node)(man, bo, place, mem);
		if (unlikely(ret))
			return ret;

		if (mem->mm_node) {
			ret = ttm_bo_add_move_fence(bo, man, mem);
			if (unlikely(ret)) {
				(*man->func->put_node)(man, mem);
				return ret;
			}
			break;
		}
	}

	if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) {
		mem->mem_type = mem_type;
		mem->placement = cur_flags;
		return 0;
	}

	for (i = 0; i < placement->num_busy_placement; ++i) {
		const struct ttm_place *place = &placement->busy_placement[i];

		ret = ttm_mem_type_from_place(place, &mem_type);
		if (ret)
			return ret;
		man = &bdev->man[mem_type];
		if (!man->has_type || !man->use_type)
			continue;
		if (!ttm_bo_mt_compatible(man, mem_type, place, &cur_flags))
			continue;

		type_found = true;
		cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
						  cur_flags);
		/*
                 * Use the access and other non-mapping-related flag bits from
                 * the memory placement flags to the current flags
                 */
		ttm_flag_masked(&cur_flags, place->flags,
				~TTM_PL_MASK_MEMTYPE);

		if (mem_type == TTM_PL_SYSTEM) {
			mem->mem_type = mem_type;
			mem->placement = cur_flags;
			mem->mm_node = NULL;
			return 0;
		}

		ret = ttm_bo_mem_force_space(bo, mem_type, place, mem, ctx);
		if (ret == 0 && mem->mm_node) {
			mem->placement = cur_flags;
			return 0;
		}
		if (ret == -ERESTARTSYS)
			has_erestartsys = true;
	}

	if (!type_found) {
		pr_err(TTM_PFX "No compatible memory type found\n");
		return -EINVAL;
	}

	return (has_erestartsys) ? -ERESTARTSYS : -ENOMEM;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
363
65.05%
5
38.46%
Christian König
98
17.56%
4
30.77%
Jérôme Glisse
75
13.44%
1
7.69%
Ben Skeggs
15
2.69%
1
7.69%
Joe Perches
4
0.72%
1
7.69%
Dave Airlie
3
0.54%
1
7.69%
Total
558
100.00%
13
100.00%

EXPORT_SYMBOL(ttm_bo_mem_space);



static int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
			      struct ttm_placement *placement,
			      struct ttm_operation_ctx *ctx)
{
	int ret = 0;
	struct ttm_mem_reg mem;

	reservation_object_assert_held(bo->resv);

	mem.num_pages = bo->num_pages;
	mem.size = mem.num_pages << PAGE_SHIFT;
	mem.page_alignment = bo->mem.page_alignment;
	mem.bus.io_reserved_vm = false;
	mem.bus.io_reserved_count = 0;
	/*
         * Determine where to move the buffer.
         */
	ret = ttm_bo_mem_space(bo, placement, &mem, ctx);
	if (ret)
		goto out_unlock;
	ret = ttm_bo_handle_move_mem(bo, &mem, false, ctx);
out_unlock:
	if (ret && mem.mm_node)
		ttm_bo_mem_put(bo, &mem);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
111
80.43%
2
20.00%
Jérôme Glisse
12
8.70%
2
20.00%
Christian König
9
6.52%
3
30.00%
Ben Skeggs
3
2.17%
1
10.00%
Maarten Lankhorst
2
1.45%
1
10.00%
Rashika Kheria
1
0.72%
1
10.00%
Total
138
100.00%
10
100.00%



static bool ttm_bo_places_compat(const struct ttm_place *places,
				 unsigned num_placement,
				 struct ttm_mem_reg *mem,
				 uint32_t *new_flags)
{
	unsigned i;

	for (i = 0; i < num_placement; i++) {
		const struct ttm_place *heap = &places[i];

		if (mem->mm_node && (mem->start < heap->fpfn ||
		     (heap->lpfn != 0 && (mem->start + mem->num_pages) > heap->lpfn)))
			continue;

		*new_flags = heap->flags;
		if ((*new_flags & mem->placement & TTM_PL_MASK_CACHING) &&
		    (*new_flags & mem->placement & TTM_PL_MASK_MEM) &&
		    (!(*new_flags & TTM_PL_FLAG_CONTIGUOUS) ||
		     (mem->placement & TTM_PL_FLAG_CONTIGUOUS)))
			return true;
	}
	return false;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
63
42.57%
3
33.33%
Christian König
62
41.89%
3
33.33%
Michel Dänzer
10
6.76%
1
11.11%
Jérôme Glisse
7
4.73%
1
11.11%
Ben Skeggs
6
4.05%
1
11.11%
Total
148
100.00%
9
100.00%



bool ttm_bo_mem_compat(struct ttm_placement *placement,
		       struct ttm_mem_reg *mem,
		       uint32_t *new_flags)
{
	if (ttm_bo_places_compat(placement->placement, placement->num_placement,
				 mem, new_flags))
		return true;

	if ((placement->busy_placement != placement->placement ||
	     placement->num_busy_placement > placement->num_placement) &&
	    ttm_bo_places_compat(placement->busy_placement,
				 placement->num_busy_placement,
				 mem, new_flags))
		return true;

	return false;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Christian König
61
76.25%
2
33.33%
Thomas Hellstrom
17
21.25%
2
33.33%
Jérôme Glisse
1
1.25%
1
16.67%
Michel Dänzer
1
1.25%
1
16.67%
Total
80
100.00%
6
100.00%

EXPORT_SYMBOL(ttm_bo_mem_compat);



int ttm_bo_validate(struct ttm_buffer_object *bo,
		    struct ttm_placement *placement,
		    struct ttm_operation_ctx *ctx)
{
	int ret;
	uint32_t new_flags;

	reservation_object_assert_held(bo->resv);
	/*
         * Check whether we need to move buffer.
         */
	if (!ttm_bo_mem_compat(placement, &bo->mem, &new_flags)) {
		ret = ttm_bo_move_buffer(bo, placement, ctx);
		if (ret)
			return ret;
	} else {
		/*
                 * Use the access and other non-mapping-related flag bits from
                 * the compatible memory placement flags to the active flags
                 */
		ttm_flag_masked(&bo->mem.placement, new_flags,
				~TTM_PL_MASK_MEMTYPE);
	}
	/*
         * We might need to add a TTM.
         */
	if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
		ret = ttm_tt_create(bo, true);
		if (ret)
			return ret;
	}
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
94
74.02%
2
25.00%
Jérôme Glisse
24
18.90%
2
25.00%
Christian König
7
5.51%
3
37.50%
Maarten Lankhorst
2
1.57%
1
12.50%
Total
127
100.00%
8
100.00%

EXPORT_SYMBOL(ttm_bo_validate);



int ttm_bo_init_reserved(struct ttm_bo_device *bdev,
			 struct ttm_buffer_object *bo,
			 unsigned long size,
			 enum ttm_bo_type type,
			 struct ttm_placement *placement,
			 uint32_t page_alignment,
			 struct ttm_operation_ctx *ctx,
			 size_t acc_size,
			 struct sg_table *sg,
			 struct reservation_object *resv,
			 void (*destroy) (struct ttm_buffer_object *))
{
	int ret = 0;
	unsigned long num_pages;
	struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
	bool locked;

	ret = ttm_mem_global_alloc(mem_glob, acc_size, ctx);
	if (ret) {
		pr_err("Out of kernel memory\n");
		if (destroy)
			(*destroy)(bo);
		else
			kfree(bo);
		return -ENOMEM;
	}

	num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
	if (num_pages == 0) {
		pr_err("Illegal buffer object size\n");
		if (destroy)
			(*destroy)(bo);
		else
			kfree(bo);
		ttm_mem_global_free(mem_glob, acc_size);
		return -EINVAL;
	}
	bo->destroy = destroy ? destroy : ttm_bo_default_destroy;

	kref_init(&bo->kref);
	kref_init(&bo->list_kref);
	atomic_set(&bo->cpu_writers, 0);
	INIT_LIST_HEAD(&bo->lru);
	INIT_LIST_HEAD(&bo->ddestroy);
	INIT_LIST_HEAD(&bo->swap);
	INIT_LIST_HEAD(&bo->io_reserve_lru);
	mutex_init(&bo->wu_mutex);
	bo->bdev = bdev;
	bo->type = type;
	bo->num_pages = num_pages;
	bo->mem.size = num_pages << PAGE_SHIFT;
	bo->mem.mem_type = TTM_PL_SYSTEM;
	bo->mem.num_pages = bo->num_pages;
	bo->mem.mm_node = NULL;
	bo->mem.page_alignment = page_alignment;
	bo->mem.bus.io_reserved_vm = false;
	bo->mem.bus.io_reserved_count = 0;
	bo->moving = NULL;
	bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED);
	bo->acc_size = acc_size;
	bo->sg = sg;
	if (resv) {
		bo->resv = resv;
		reservation_object_assert_held(bo->resv);
	} else {
		bo->resv = &bo->ttm_resv;
	}
	reservation_object_init(&bo->ttm_resv);
	atomic_inc(&bo->bdev->glob->bo_count);
	drm_vma_node_reset(&bo->vma_node);
	bo->priority = 0;

	/*
         * For ttm_bo_type_device buffers, allocate
         * address space from the device.
         */
	if (bo->type == ttm_bo_type_device ||
	    bo->type == ttm_bo_type_sg)
		ret = drm_vma_offset_add(&bdev->vma_manager, &bo->vma_node,
					 bo->mem.num_pages);

	/* passed reservation objects should already be locked,
         * since otherwise lockdep will be angered in radeon.
         */
	if (!resv) {
		locked = reservation_object_trylock(bo->resv);
		WARN_ON(!locked);
	}

	if (likely(!ret))
		ret = ttm_bo_validate(bo, placement, ctx);

	if (unlikely(ret)) {
		if (!resv)
			ttm_bo_unreserve(bo);

		ttm_bo_unref(&bo);
		return ret;
	}

	if (resv && !(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) {
		spin_lock(&bdev->glob->lru_lock);
		ttm_bo_add_to_lru(bo);
		spin_unlock(&bdev->glob->lru_lock);
	}

	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
302
51.62%
6
20.69%
Maarten Lankhorst
77
13.16%
2
6.90%
Jérôme Glisse
76
12.99%
5
17.24%
Christian König
58
9.91%
7
24.14%
David Herrmann
23
3.93%
2
6.90%
Nicolai Hähnle
20
3.42%
2
6.90%
Dave Airlie
17
2.91%
1
3.45%
Joe Perches
6
1.03%
1
3.45%
Tom St Denis
4
0.68%
1
3.45%
Roger He
1
0.17%
1
3.45%
Michel Dänzer
1
0.17%
1
3.45%
Total
585
100.00%
29
100.00%

EXPORT_SYMBOL(ttm_bo_init_reserved);



int ttm_bo_init(struct ttm_bo_device *bdev,
		struct ttm_buffer_object *bo,
		unsigned long size,
		enum ttm_bo_type type,
		struct ttm_placement *placement,
		uint32_t page_alignment,
		bool interruptible,
		size_t acc_size,
		struct sg_table *sg,
		struct reservation_object *resv,
		void (*destroy) (struct ttm_buffer_object *))
{
	struct ttm_operation_ctx ctx = { interruptible, false };
	int ret;

	ret = ttm_bo_init_reserved(bdev, bo, size, type, placement,
				   page_alignment, &ctx, acc_size,
				   sg, resv, destroy);
	if (ret)
		return ret;

	if (!resv)
		ttm_bo_unreserve(bo);

	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Nicolai Hähnle
107
89.92%
1
50.00%
Christian König
12
10.08%
1
50.00%
Total
119
100.00%
2
100.00%

EXPORT_SYMBOL(ttm_bo_init);



size_t ttm_bo_acc_size(struct ttm_bo_device *bdev,
		       unsigned long bo_size,
		       unsigned struct_size)
{
	unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT;
	size_t size = 0;

	size += ttm_round_pot(struct_size);
	size += ttm_round_pot(npages * sizeof(void *));
	size += ttm_round_pot(sizeof(struct ttm_tt));
	return size;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Jérôme Glisse
50
73.53%
1
33.33%
Thomas Hellstrom
17
25.00%
1
33.33%
Felix Kuehling
1
1.47%
1
33.33%
Total
68
100.00%
3
100.00%

EXPORT_SYMBOL(ttm_bo_acc_size);



size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev,
			   unsigned long bo_size,
			   unsigned struct_size)
{
	unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT;
	size_t size = 0;

	size += ttm_round_pot(struct_size);
	size += ttm_round_pot(npages * (2*sizeof(void *) + sizeof(dma_addr_t)));
	size += ttm_round_pot(sizeof(struct ttm_dma_tt));
	return size;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Jérôme Glisse
66
85.71%
1
33.33%
Felix Kuehling
6
7.79%
1
33.33%
Thomas Hellstrom
5
6.49%
1
33.33%
Total
77
100.00%
3
100.00%

EXPORT_SYMBOL(ttm_bo_dma_acc_size);



int ttm_bo_create(struct ttm_bo_device *bdev,
			unsigned long size,
			enum ttm_bo_type type,
			struct ttm_placement *placement,
			uint32_t page_alignment,
			bool interruptible,
			struct ttm_buffer_object **p_bo)
{
	struct ttm_buffer_object *bo;
	size_t acc_size;
	int ret;

	bo = kzalloc(sizeof(*bo), GFP_KERNEL);
	if (unlikely(bo == NULL))
		return -ENOMEM;

	acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct ttm_buffer_object));
	ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment,
			  interruptible, acc_size,
			  NULL, NULL, NULL);
	if (likely(ret == 0))
		*p_bo = bo;

	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
73
55.73%
2
28.57%
Jérôme Glisse
54
41.22%
3
42.86%
Maarten Lankhorst
2
1.53%
1
14.29%
Dave Airlie
2
1.53%
1
14.29%
Total
131
100.00%
7
100.00%

EXPORT_SYMBOL(ttm_bo_create);



static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev,
				   unsigned mem_type)
{
	struct ttm_operation_ctx ctx = {
		.interruptible = false,
		.no_wait_gpu = false,
		.flags = TTM_OPT_FLAG_FORCE_ALLOC
	};
	struct ttm_mem_type_manager *man = &bdev->man[mem_type];
	struct ttm_bo_global *glob = bdev->glob;
	struct dma_fence *fence;
	int ret;
	unsigned i;

	/*
         * Can't use standard list traversal since we're unlocking.
         */

	spin_lock(&glob->lru_lock);
	for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
		while (!list_empty(&man->lru[i])) {
			spin_unlock(&glob->lru_lock);
			ret = ttm_mem_evict_first(bdev, mem_type, NULL, &ctx);
			if (ret)
				return ret;
			spin_lock(&glob->lru_lock);
		}
	}
	spin_unlock(&glob->lru_lock);

	spin_lock(&man->move_lock);
	fence = dma_fence_get(man->move);
	spin_unlock(&man->move_lock);

	if (fence) {
		ret = dma_fence_wait(fence, false);
		dma_fence_put(fence);
		if (ret)
			return ret;
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christian König
86
41.35%
3
33.33%
Thomas Hellstrom
77
37.02%
2
22.22%
Jérôme Glisse
28
13.46%
1
11.11%
Roger He
11
5.29%
1
11.11%
Chris Wilson
4
1.92%
1
11.11%
Michel Dänzer
2
0.96%
1
11.11%
Total
208
100.00%
9
100.00%



int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type)
{
	struct ttm_mem_type_manager *man;
	int ret = -EINVAL;

	if (mem_type >= TTM_NUM_MEM_TYPES) {
		pr_err("Illegal memory type %d\n", mem_type);
		return ret;
	}
	man = &bdev->man[mem_type];

	if (!man->has_type) {
		pr_err("Trying to take down uninitialized memory manager type %u\n",
		       mem_type);
		return ret;
	}

	man->use_type = false;
	man->has_type = false;

	ret = 0;
	if (mem_type > 0) {
		ret = ttm_bo_force_list_clean(bdev, mem_type);
		if (ret) {
			pr_err("Cleanup eviction failed\n");
			return ret;
		}

		ret = (*man->func->takedown)(man);
	}

	dma_fence_put(man->move);
	man->move = NULL;

	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
94
63.51%
1
16.67%
Christian König
16
10.81%
1
16.67%
John Brooks
13
8.78%
1
16.67%
Roel Kluin
10
6.76%
1
16.67%
Ben Skeggs
8
5.41%
1
16.67%
Joe Perches
7
4.73%
1
16.67%
Total
148
100.00%
6
100.00%

EXPORT_SYMBOL(ttm_bo_clean_mm);



int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type)
{
	struct ttm_mem_type_manager *man = &bdev->man[mem_type];

	if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) {
		pr_err("Illegal memory manager memory type %u\n", mem_type);
		return -EINVAL;
	}

	if (!man->has_type) {
		pr_err("Memory type %u has not been initialized\n", mem_type);
		return 0;
	}

	return ttm_bo_force_list_clean(bdev, mem_type);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
68
89.47%
1
50.00%
Joe Perches
8
10.53%
1
50.00%
Total
76
100.00%
2
100.00%

EXPORT_SYMBOL(ttm_bo_evict_mm);



int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
			unsigned long p_size)
{
	int ret;
	struct ttm_mem_type_manager *man;
	unsigned i;

	BUG_ON(type >= TTM_NUM_MEM_TYPES);
	man = &bdev->man[type];
	BUG_ON(man->has_type);
	man->io_reserve_fastpath = true;
	man->use_io_reserve_lru = false;
	mutex_init(&man->io_reserve_mutex);
	spin_lock_init(&man->move_lock);
	INIT_LIST_HEAD(&man->io_reserve_lru);

	ret = bdev->driver->init_mem_type(bdev, type, man);
	if (ret)
		return ret;
	man->bdev = bdev;

	if (type != TTM_PL_SYSTEM) {
		ret = (*man->func->init)(man, p_size);
		if (ret)
			return ret;
	}
	man->has_type = true;
	man->use_type = true;
	man->size = p_size;

	for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
		INIT_LIST_HEAD(&man->lru[i]);
	man->move = NULL;

	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
151
76.26%
3
50.00%
Christian König
33
16.67%
2
33.33%
Ben Skeggs
14
7.07%
1
16.67%
Total
198
100.00%
6
100.00%

EXPORT_SYMBOL(ttm_bo_init_mm);



static void ttm_bo_global_kobj_release(struct kobject *kobj)
{
	struct ttm_bo_global *glob =
		container_of(kobj, struct ttm_bo_global, kobj);

	__free_page(glob->dummy_read_page);
	kfree(glob);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
38
100.00%
2
100.00%
Total
38
100.00%
2
100.00%



void ttm_bo_global_release(struct drm_global_reference *ref)
{
	struct ttm_bo_global *glob = ref->object;

	kobject_del(&glob->kobj);
	kobject_put(&glob->kobj);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
34
97.14%
1
50.00%
Dave Airlie
1
2.86%
1
50.00%
Total
35
100.00%
2
100.00%

EXPORT_SYMBOL(ttm_bo_global_release);



int ttm_bo_global_init(struct drm_global_reference *ref)
{
	struct ttm_bo_global_ref *bo_ref =
		container_of(ref, struct ttm_bo_global_ref, ref);
	struct ttm_bo_global *glob = ref->object;
	int ret;
	unsigned i;

	mutex_init(&glob->device_list_mutex);
	spin_lock_init(&glob->lru_lock);
	glob->mem_glob = bo_ref->mem_glob;
	glob->mem_glob->bo_glob = glob;
	glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32);

	if (unlikely(glob->dummy_read_page == NULL)) {
		ret = -ENOMEM;
		goto out_no_drp;
	}

	for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
		INIT_LIST_HEAD(&glob->swap_lru[i]);
	INIT_LIST_HEAD(&glob->device_list);
	atomic_set(&glob->bo_count, 0);

	ret = kobject_init_and_add(
		&glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), "buffer_objects");
	if (unlikely(ret != 0))
		kobject_put(&glob->kobj);
	return ret;
out_no_drp:
	kfree(glob);
	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
163
84.02%
1
20.00%
Christian König
19
9.79%
1
20.00%
Roger He
8
4.12%
1
20.00%
Robert P. J. Day
3
1.55%
1
20.00%
Dave Airlie
1
0.52%
1
20.00%
Total
194
100.00%
5
100.00%

EXPORT_SYMBOL(ttm_bo_global_init);




int ttm_bo_device_release(struct ttm_bo_device *bdev)
{
	int ret = 0;
	unsigned i = TTM_NUM_MEM_TYPES;
	struct ttm_mem_type_manager *man;
	struct ttm_bo_global *glob = bdev->glob;

	while (i--) {
		man = &bdev->man[i];
		if (man->has_type) {
			man->use_type = false;
			if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) {
				ret = -EBUSY;
				pr_err("DRM memory manager type %d is not clean\n",
				       i);
			}
			man->has_type = false;
		}
	}

	mutex_lock(&glob->device_list_mutex);
	list_del(&bdev->device_list);
	mutex_unlock(&glob->device_list_mutex);

	cancel_delayed_work_sync(&bdev->wq);

	if (ttm_bo_delayed_delete(bdev, true))
		pr_debug("Delayed destroy list was clean\n");

	spin_lock(&glob->lru_lock);
	for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
		if (list_empty(&bdev->man[0].lru[0]))
			pr_debug("Swap list %d was clean\n", i);
	spin_unlock(&glob->lru_lock);

	drm_vma_offset_manager_destroy(&bdev->vma_manager);

	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
178
84.36%
2
25.00%
Christian König
26
12.32%
3
37.50%
Joe Perches
4
1.90%
1
12.50%
David Herrmann
2
0.95%
1
12.50%
Tejun Heo
1
0.47%
1
12.50%
Total
211
100.00%
8
100.00%

EXPORT_SYMBOL(ttm_bo_device_release);



int ttm_bo_device_init(struct ttm_bo_device *bdev,
		       struct ttm_bo_global *glob,
		       struct ttm_bo_driver *driver,
		       struct address_space *mapping,
		       uint64_t file_page_offset,
		       bool need_dma32)
{
	int ret = -EINVAL;

	bdev->driver = driver;

	memset(bdev->man, 0, sizeof(bdev->man));

	/*
         * Initialize the system memory buffer type.
         * Other types need to be driver / IOCTL initialized.
         */
	ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0);
	if (unlikely(ret != 0))
		goto out_no_sys;

	drm_vma_offset_manager_init(&bdev->vma_manager, file_page_offset,
				    0x10000000);
	INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue);
	INIT_LIST_HEAD(&bdev->ddestroy);
	bdev->dev_mapping = mapping;
	bdev->glob = glob;
	bdev->need_dma32 = need_dma32;
	mutex_lock(&glob->device_list_mutex);
	list_add_tail(&bdev->device_list, &glob->device_list);
	mutex_unlock(&glob->device_list_mutex);

	return 0;
out_no_sys:
	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
151
89.88%
2
40.00%
Dave Airlie
9
5.36%
1
20.00%
David Herrmann
8
4.76%
2
40.00%
Total
168
100.00%
5
100.00%

EXPORT_SYMBOL(ttm_bo_device_init);

/*
 * buffer object vm functions.
 */



bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
{
	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];

	if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) {
		if (mem->mem_type == TTM_PL_SYSTEM)
			return false;

		if (man->flags & TTM_MEMTYPE_FLAG_CMA)
			return false;

		if (mem->placement & TTM_PL_FLAG_CACHED)
			return false;
	}
	return true;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
79
100.00%
1
100.00%
Total
79
100.00%
1
100.00%



void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo)
{
	struct ttm_bo_device *bdev = bo->bdev;

	drm_vma_node_unmap(&bo->vma_node, bdev->dev_mapping);
	ttm_mem_io_free_vm(bo);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
30
83.33%
2
40.00%
David Herrmann
5
13.89%
2
40.00%
Jérôme Glisse
1
2.78%
1
20.00%
Total
36
100.00%
5
100.00%



void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
{
	struct ttm_bo_device *bdev = bo->bdev;
	struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type];

	ttm_mem_io_lock(man, false);
	ttm_bo_unmap_virtual_locked(bo);
	ttm_mem_io_unlock(man);
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
46
86.79%
2
66.67%
Jérôme Glisse
7
13.21%
1
33.33%
Total
53
100.00%
3
100.00%

EXPORT_SYMBOL(ttm_bo_unmap_virtual);



int ttm_bo_wait(struct ttm_buffer_object *bo,
		bool interruptible, bool no_wait)
{
	long timeout = 15 * HZ;

	if (no_wait) {
		if (reservation_object_test_signaled_rcu(bo->resv, true))
			return 0;
		else
			return -EBUSY;
	}

	timeout = reservation_object_wait_timeout_rcu(bo->resv, true,
						      interruptible, timeout);
	if (timeout < 0)
		return timeout;

	if (timeout == 0)
		return -EBUSY;

	reservation_object_add_excl_fence(bo->resv, NULL);
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Christian König
31
32.98%
2
28.57%
Maarten Lankhorst
29
30.85%
2
28.57%
Thomas Hellstrom
22
23.40%
1
14.29%
Dave Airlie
10
10.64%
1
14.29%
Marek Olšák
2
2.13%
1
14.29%
Total
94
100.00%
7
100.00%

EXPORT_SYMBOL(ttm_bo_wait);



int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait)
{
	int ret = 0;

	/*
         * Using ttm_bo_reserve makes sure the lru lists are updated.
         */

	ret = ttm_bo_reserve(bo, true, no_wait, NULL);
	if (unlikely(ret != 0))
		return ret;
	ret = ttm_bo_wait(bo, true, no_wait);
	if (likely(ret == 0))
		atomic_inc(&bo->cpu_writers);
	ttm_bo_unreserve(bo);
	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
79
98.75%
2
66.67%
Martin Kepplinger
1
1.25%
1
33.33%
Total
80
100.00%
3
100.00%

EXPORT_SYMBOL(ttm_bo_synccpu_write_grab);



void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo)
{
	atomic_dec(&bo->cpu_writers);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
17
94.44%
1
50.00%
Maarten Lankhorst
1
5.56%
1
50.00%
Total
18
100.00%
2
100.00%

EXPORT_SYMBOL(ttm_bo_synccpu_write_release);

/**
 * A buffer object shrink method that tries to swap out the first
 * buffer object on the bo_global::swap_lru list.
 */


int ttm_bo_swapout(struct ttm_bo_global *glob, struct ttm_operation_ctx *ctx)
{
	struct ttm_buffer_object *bo;
	int ret = -EBUSY;
	bool locked;
	unsigned i;

	spin_lock(&glob->lru_lock);
	for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
		list_for_each_entry(bo, &glob->swap_lru[i], swap) {
			if (ttm_bo_evict_swapout_allowable(bo, ctx, &locked)) {
				ret = 0;
				break;
			}
		}
		if (!ret)
			break;
	}

	if (ret) {
		spin_unlock(&glob->lru_lock);
		return ret;
	}

	kref_get(&bo->list_kref);

	if (!list_empty(&bo->ddestroy)) {
		ret = ttm_bo_cleanup_refs(bo, false, false, locked);
		kref_put(&bo->list_kref, ttm_bo_release_list);
		return ret;
	}

	ttm_bo_del_from_lru(bo);
	spin_unlock(&glob->lru_lock);

	/**
         * Move to system cached
         */

	if (bo->mem.mem_type != TTM_PL_SYSTEM ||
	    bo->ttm->caching_state != tt_cached) {
		struct ttm_operation_ctx ctx = { false, false };
		struct ttm_mem_reg evict_mem;

		evict_mem = bo->mem;
		evict_mem.mm_node = NULL;
		evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED;
		evict_mem.mem_type = TTM_PL_SYSTEM;

		ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, &ctx);
		if (unlikely(ret != 0))
			goto out;
	}

	/**
         * Make sure BO is idle.
         */

	ret = ttm_bo_wait(bo, false, false);
	if (unlikely(ret != 0))
		goto out;

	ttm_bo_unmap_virtual(bo);

	/**
         * Swap out. Buffer will be swapped in again as soon as
         * anyone tries to access a ttm page.
         */

	if (bo->bdev->driver->swap_notify)
		bo->bdev->driver->swap_notify(bo);

	ret = ttm_tt_swapout(bo->ttm, bo->persistent_swap_storage);
out:

	/**
         *
         * Unreserve without putting on LRU to avoid swapping out an
         * already swapped buffer.
         */
	if (locked)
		reservation_object_unlock(bo->resv);
	kref_put(&bo->list_kref, ttm_bo_release_list);
	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
221
63.87%
4
23.53%
Christian König
67
19.36%
6
35.29%
Roger He
24
6.94%
3
17.65%
Maarten Lankhorst
19
5.49%
1
5.88%
Michel Dänzer
10
2.89%
1
5.88%
Felix Kuehling
4
1.16%
1
5.88%
Jan Engelhardt
1
0.29%
1
5.88%
Total
346
100.00%
17
100.00%

EXPORT_SYMBOL(ttm_bo_swapout);



void ttm_bo_swapout_all(struct ttm_bo_device *bdev)
{
	struct ttm_operation_ctx ctx = {
		.interruptible = false,
		.no_wait_gpu = false
	};

	while (ttm_bo_swapout(bdev->glob, &ctx) == 0)
		;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
22
53.66%
2
66.67%
Roger He
19
46.34%
1
33.33%
Total
41
100.00%
3
100.00%

EXPORT_SYMBOL(ttm_bo_swapout_all);

/**
 * ttm_bo_wait_unreserved - interruptible wait for a buffer object to become
 * unreserved
 *
 * @bo: Pointer to buffer
 */


int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo)
{
	int ret;

	/*
         * In the absense of a wait_unlocked API,
         * Use the bo::wu_mutex to avoid triggering livelocks due to
         * concurrent use of this function. Note that this use of
         * bo::wu_mutex can go away if we change locking order to
         * mmap_sem -> bo::reserve.
         */
	ret = mutex_lock_interruptible(&bo->wu_mutex);
	if (unlikely(ret != 0))
		return -ERESTARTSYS;
	if (!ww_mutex_is_locked(&bo->resv->lock))
		goto out_unlock;
	ret = reservation_object_lock_interruptible(bo->resv, NULL);
	if (ret == -EINTR)
		ret = -ERESTARTSYS;
	if (unlikely(ret != 0))
		goto out_unlock;
	reservation_object_unlock(bo->resv);

out_unlock:
	mutex_unlock(&bo->wu_mutex);
	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
90
83.33%
1
33.33%
Christian König
18
16.67%
2
66.67%
Total
108
100.00%
3
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Hellstrom
4594
54.91%
28
17.50%
Christian König
1528
18.26%
44
27.50%
Jérôme Glisse
784
9.37%
8
5.00%
Maarten Lankhorst
452
5.40%
16
10.00%
Ben Skeggs
206
2.46%
7
4.38%
Roger He
168
2.01%
9
5.62%
Nicolai Hähnle
140
1.67%
3
1.88%
Joe Perches
109
1.30%
2
1.25%
Matthew Garrett
70
0.84%
1
0.62%
Dave Airlie
66
0.79%
9
5.62%
Michel Dänzer
48
0.57%
4
2.50%
David Herrmann
41
0.49%
4
2.50%
Peter Zijlstra
37
0.44%
2
1.25%
Tom St Denis
21
0.25%
1
0.62%
Luca Barbieri
18
0.22%
1
0.62%
Felix Kuehling
15
0.18%
3
1.88%
John Brooks
13
0.16%
1
0.62%
Chris Wilson
11
0.13%
1
0.62%
Roel Kluin
10
0.12%
1
0.62%
Rob Clark
10
0.12%
1
0.62%
Sinclair Yeh
5
0.06%
1
0.62%
Robert P. J. Day
3
0.04%
1
0.62%
David Howells
3
0.04%
1
0.62%
Flora Cui
2
0.02%
1
0.62%
Martin Kepplinger
2
0.02%
1
0.62%
Marek Olšák
2
0.02%
1
0.62%
Rashika Kheria
1
0.01%
1
0.62%
Jan Engelhardt
1
0.01%
1
0.62%
Tejun Heo
1
0.01%
1
0.62%
Monk Liu
1
0.01%
1
0.62%
Emese Revfy
1
0.01%
1
0.62%
Linus Torvalds
1
0.01%
1
0.62%
Alex Deucher
1
0.01%
1
0.62%
Arun Sharma
1
0.01%
1
0.62%
Total
8366
100.00%
160
100.00%
Directory: drivers/gpu/drm/ttm

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