Release 4.7 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>


#define TTM_ASSERT_LOCKED(param)

#define TTM_DEBUG(fmt, arg...)

#define TTM_BO_HASH_ORDER 13

static int ttm_bo_swapout(struct ttm_mem_shrink *shrink);
static void ttm_bo_global_kobj_release(struct kobject *kobj);


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



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

	for (i = 0; i <= TTM_PL_PRIV5; i++)
		if (place->flags & (1 << i)) {
			*mem_type = i;
			return 0;
		}
	return -EINVAL;
}

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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];

	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, TTM_PFX);
}

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35
31.82%
1
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ben skeggs
ben skeggs
6
5.45%
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alex deucher
alex deucher
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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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joe perches
30
25.64%
1
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christian koenig
christian koenig
4
3.42%
1
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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, "%lu\n",
			(unsigned long) atomic_read(&glob->bo_count));
}

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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(atomic_read(&bo->list_kref.refcount));
	BUG_ON(atomic_read(&bo->kref.refcount));
	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));

	if (bo->ttm)
		ttm_tt_destroy(bo->ttm);
	atomic_dec(&bo->glob->bo_count);
	if (bo->resv == &bo->ttm_resv)
		reservation_object_fini(&bo->ttm_resv);
	mutex_destroy(&bo->wu_mutex);
	if (bo->destroy)
		bo->destroy(bo);
	else {
		kfree(bo);
	}
	ttm_mem_global_free(bdev->glob->mem_glob, acc_size);
}

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thomas hellstrom
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maarten lankhorst
19
9.69%
1
20.00%
jerome glisse
jerome glisse
13
6.63%
1
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void ttm_bo_add_to_lru(struct ttm_buffer_object *bo)
{
	struct ttm_bo_device *bdev = bo->bdev;

	lockdep_assert_held(&bo->resv->lock.base);

	if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) {

		BUG_ON(!list_empty(&bo->lru));

		list_add(&bo->lru, bdev->driver->lru_tail(bo));
		kref_get(&bo->list_kref);

		if (bo->ttm && !(bo->ttm->page_flags & TTM_PAGE_FLAG_SG)) {
			list_add(&bo->swap, bdev->driver->swap_lru_tail(bo));
			kref_get(&bo->list_kref);
		}
	}
}
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thomas hellstrom
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2
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christian koenig
26
20.47%
2
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maarten lankhorst
maarten lankhorst
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6.30%
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EXPORT_SYMBOL(ttm_bo_add_to_lru);



int ttm_bo_del_from_lru(struct ttm_buffer_object *bo)
{
	struct ttm_bo_device *bdev = bo->bdev;
	int put_count = 0;

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

	if (!list_empty(&bo->swap)) {
		list_del_init(&bo->swap);
		++put_count;
	}
	if (!list_empty(&bo->lru)) {
		list_del_init(&bo->lru);
		++put_count;
	}

	return put_count;
}

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christian koenig
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28.26%
1
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92
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100.00%



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

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void ttm_bo_list_ref_sub(struct ttm_buffer_object *bo, int count,
			 bool never_free)
{
	kref_sub(&bo->list_kref, count,
		 (never_free) ? ttm_bo_ref_bug : ttm_bo_release_list);
}

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thomas hellstrom
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void ttm_bo_del_sub_from_lru(struct ttm_buffer_object *bo)
{
	int put_count;

	spin_lock(&bo->glob->lru_lock);
	put_count = ttm_bo_del_from_lru(bo);
	spin_unlock(&bo->glob->lru_lock);
	ttm_bo_list_ref_sub(bo, put_count, true);
}
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thomas hellstrom
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maarten lankhorst
maarten lankhorst
10
20.41%
2
40.00%
dave airlie
dave airlie
4
8.16%
1
20.00%
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49
100.00%
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)
{
	struct ttm_bo_device *bdev = bo->bdev;
	int put_count = 0;

	lockdep_assert_held(&bo->resv->lock.base);

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

	put_count = ttm_bo_del_from_lru(bo);
	ttm_bo_list_ref_sub(bo, put_count, true);
	ttm_bo_add_to_lru(bo);
}
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flora cui
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14.86%
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74
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4
100.00%


EXPORT_SYMBOL(ttm_bo_move_to_lru_tail);



struct list_head *ttm_bo_default_lru_tail(struct ttm_buffer_object *bo)
{
	return bo->bdev->man[bo->mem.mem_type].lru.prev;
}
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EXPORT_SYMBOL(ttm_bo_default_lru_tail);



struct list_head *ttm_bo_default_swap_lru_tail(struct ttm_buffer_object *bo)
{
	return bo->glob->swap_lru.prev;
}
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EXPORT_SYMBOL(ttm_bo_default_swap_lru_tail);

/*
 * Call bo->mutex locked.
 */


static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc)
{
	struct ttm_bo_device *bdev = bo->bdev;
	struct ttm_bo_global *glob = bo->glob;
	int ret = 0;
	uint32_t page_flags = 0;

	TTM_ASSERT_LOCKED(&bo->mutex);
	bo->ttm = NULL;

	if (bdev->need_dma32)
		page_flags |= TTM_PAGE_FLAG_DMA32;

	switch (bo->type) {
	case ttm_bo_type_device:
		if (zero_alloc)
			page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
	case ttm_bo_type_kernel:
		bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
						      page_flags, glob->dummy_read_page);
		if (unlikely(bo->ttm == NULL))
			ret = -ENOMEM;
		break;
	case ttm_bo_type_sg:
		bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
						      page_flags | TTM_PAGE_FLAG_SG,
						      glob->dummy_read_page);
		if (unlikely(bo->ttm == NULL)) {
			ret = -ENOMEM;
			break;
		}
		bo->ttm->sg = bo->sg;
		break;
	default:
		pr_err("Illegal buffer object type\n");
		ret = -EINVAL;
		break;
	}

	return ret;
}

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34.15%
2
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jerome glisse
4
1.95%
1
16.67%
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joe perches
2
0.98%
1
16.67%
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6
100.00%



static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
				  struct ttm_mem_reg *mem,
				  bool evict, bool interruptible,
				  bool no_wait_gpu)
{
	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_bo_add_ttm(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);
			if (ret)
				goto out_err;
		}

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

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

	if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
	    !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED))
		ret = ttm_bo_move_ttm(bo, evict, no_wait_gpu, mem);
	else if (bdev->driver->move)
		ret = bdev->driver->move(bo, evict, interruptible,
					 no_wait_gpu, mem);
	else
		ret = ttm_bo_move_memcpy(bo, evict, no_wait_gpu, 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, 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;
		bo->cur_placement = bo->mem.placement;
	} else
		bo->offset = 0;

	return 0;

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

	return ret;
}

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ben skeggs
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14.56%
4
30.77%
jerome glisse
jerome glisse
23
3.72%
2
15.38%
rob clark
rob clark
10
1.62%
1
7.69%
dave airlie
dave airlie
5
0.81%
1
7.69%
joe perches
joe perches
2
0.32%
1
7.69%
Total
618
100.00%
13
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, NULL);

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

	ww_mutex_unlock (&bo->resv->lock);
}

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28.05%
1
20.00%
dave airlie
dave airlie
3
3.66%
1
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maarten lankhorst
maarten lankhorst
3
3.66%
1
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5
100.00%



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

	fobj = reservation_object_get_list(bo->resv);
	fence = reservation_object_get_excl(bo->resv);
	if (fence && !fence->ops->signaled)
		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)
			fence_enable_sw_signaling(fence);
	}
}

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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 = bo->glob;
	int put_count;
	int ret;

	spin_lock(&glob->lru_lock);
	ret = __ttm_bo_reserve(bo, false, true, NULL);

	if (!ret) {
		if (!ttm_bo_wait(bo, false, true)) {
			put_count = ttm_bo_del_from_lru(bo);

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

			ttm_bo_list_ref_sub(bo, put_count, true);

			return;
		} else
			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);
		}

		__ttm_bo_unreserve(bo);
	}

	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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3
21.43%
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dave airlie
4
2.02%
1
7.14%
martin kepplinger
martin kepplinger
1
0.51%
1
7.14%
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14
100.00%

/**
 * function ttm_bo_cleanup_refs_and_unlock
 * 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 both before returning.
 *
 * @interruptible         Any sleeps should occur interruptibly.
 * @no_wait_gpu           Never wait for gpu. Return -EBUSY instead.
 */



static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object *bo,
					  bool interruptible,
					  bool no_wait_gpu)
{
	struct ttm_bo_global *glob = bo->glob;
	int put_count;
	int ret;

	ret = ttm_bo_wait(bo, false, true);

	if (ret && !no_wait_gpu) {
		long lret;
		ww_mutex_unlock(&bo->resv->lock);
		spin_unlock(&glob->lru_lock);

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

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

		spin_lock(&glob->lru_lock);
		ret = __ttm_bo_reserve(bo, false, true, NULL);

		/*
                 * 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.
                 */
		if (ret) {
			spin_unlock(&glob->lru_lock);
			return 0;
		}

		/*
                 * remove sync_obj with ttm_bo_wait, the wait should be
                 * finished, and no new wait object should have been added.
                 */
		ret = ttm_bo_wait(bo, false, true);
		WARN_ON(ret);
	}

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

	put_count = ttm_bo_del_from_lru(bo);
	list_del_init(&bo->ddestroy);
	++put_count;

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

	ttm_bo_list_ref_sub(bo, put_count, true);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
127
52.48%
5
50.00%
maarten lankhorst
maarten lankhorst
111
45.87%
4
40.00%
dave airlie
dave airlie
4
1.65%
1
10.00%
Total
242
100.00%
10
100.00%

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



static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all)
{
	struct ttm_bo_global *glob = bdev->glob;
	struct ttm_buffer_object *entry = NULL;
	int ret = 0;

	spin_lock(&glob->lru_lock);
	if (list_empty(&bdev->ddestroy))
		goto out_unlock;

	entry = list_first_entry(&bdev->ddestroy,
		struct ttm_buffer_object, ddestroy);
	kref_get(&entry->list_kref);

	for (;;) {
		struct ttm_buffer_object *nentry = NULL;

		if (entry->ddestroy.next != &bdev->ddestroy) {
			nentry = list_first_entry(&entry->ddestroy,
				struct ttm_buffer_object, ddestroy);
			kref_get(&nentry->list_kref);
		}

		ret = __ttm_bo_reserve(entry, false, true, NULL);
		if (remove_all && ret) {
			spin_unlock(&glob->lru_lock);
			ret = __ttm_bo_reserve(entry, false, false, NULL);
			spin_lock(&glob->lru_lock);
		}

		if (!ret)
			ret = ttm_bo_cleanup_refs_and_unlock(entry, false,
							     !remove_all);
		else
			spin_unlock(&glob->lru_lock);

		kref_put(&entry->list_kref, ttm_bo_release_list);
		entry = nentry;

		if (ret || !entry)
			goto out;

		spin_lock(&glob->lru_lock);
		if (list_empty(&entry->ddestroy))
			break;
	}

out_unlock:
	spin_unlock(&glob->lru_lock);
out:
	if (entry)
		kref_put(&entry->list_kref, ttm_bo_release_list);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
140
50.18%
4
50.00%
luca barbieri
luca barbieri
78
27.96%
1
12.50%
maarten lankhorst
maarten lankhorst
59
21.15%
2
25.00%
martin kepplinger
martin kepplinger
2
0.72%
1
12.50%
Total
279
100.00%
8
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
thomas hellstrom
63
100.00%
1
100.00%
Total
63
100.00%
1
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
thomas hellstrom
94
96.91%
4
80.00%
david herrmann
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
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
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
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, bool interruptible,
			bool no_wait_gpu)
{
	struct ttm_bo_device *bdev = bo->bdev;
	struct ttm_mem_reg evict_mem;
	struct ttm_placement placement;
	int ret = 0;

	ret = ttm_bo_wait(bo, interruptible, no_wait_gpu);

	if (unlikely(ret != 0)) {
		if (ret != -ERESTARTSYS) {
			pr_err("Failed to expire sync object before buffer eviction\n");
		}
		goto out;
	}

	lockdep_assert_held(&bo->resv->lock.base);

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

	placement.num_placement = 0;
	placement.num_busy_placement = 0;
	bdev->driver->evict_flags(bo, &placement);
	ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible,
				no_wait_gpu);
	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, interruptible,
				     no_wait_gpu);
	if (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
thomas hellstrom
180
72.58%
4
33.33%
jerome glisse
jerome glisse
48
19.35%
5
41.67%
joe perches
joe perches
9
3.63%
1
8.33%
maarten lankhorst
maarten lankhorst
8
3.23%
1
8.33%
ben skeggs
ben skeggs
3
1.21%
1
8.33%
Total
248
100.00%
12
100.00%



static int ttm_mem_evict_first(struct ttm_bo_device *bdev,
				uint32_t mem_type,
				const struct ttm_place *place,
				bool interruptible,
				bool no_wait_gpu)
{
	struct ttm_bo_global *glob = bdev->glob;
	struct ttm_mem_type_manager *man = &bdev->man[mem_type];
	struct ttm_buffer_object *bo;
	int ret = -EBUSY, put_count;

	spin_lock(&glob->lru_lock);
	list_for_each_entry(bo, &man->lru, lru) {
		ret = __ttm_bo_reserve(bo, false, true, NULL);
		if (!ret) {
			if (place && (place->fpfn || place->lpfn)) {
				/* 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)) {
					__ttm_bo_unreserve(bo);
					ret = -EBUSY;
					continue;
				}
			}

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

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

	BUG_ON(ret != 0);

	ttm_bo_list_ref_sub(bo, put_count, true);

	ret = ttm_bo_evict(bo, interruptible, no_wait_gpu);
	ttm_bo_unreserve(bo);

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

Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
150
52.08%
5
41.67%
michel danzer
michel danzer
74
25.69%
1
8.33%
maarten lankhorst
maarten lankhorst
46
15.97%
2
16.67%
jerome glisse
jerome glisse
13
4.51%
2
16.67%
dave airlie
dave airlie
4
1.39%
1
8.33%
martin kepplinger
martin kepplinger
1
0.35%
1
8.33%
Total
288
100.00%
12
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
ben skeggs
33
63.46%
2
66.67%
jerome glisse
jerome glisse
19
36.54%
1
33.33%
Total
52
100.00%
3
100.00%


EXPORT_SYMBOL(ttm_bo_mem_put);

/**
 * 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,
					bool interruptible,
					bool no_wait_gpu)
{
	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,
					  interruptible, no_wait_gpu);
		if (unlikely(ret != 0))
			return ret;
	} while (1);
	if (mem->mm_node == NULL)
		return -ENOMEM;
	mem->mem_type = mem_type;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
jerome glisse
jerome glisse
112
74.17%
2
28.57%
ben skeggs
ben skeggs
16
10.60%
1
14.29%
thomas hellstrom
thomas hellstrom
16
10.60%
1
14.29%
christian koenig
christian koenig
5
3.31%
2
28.57%
michel danzer
michel danzer
2
1.32%
1
14.29%
Total
151
100.00%
7
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
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
thomas hellstrom
72
83.72%
2
66.67%
christian koenig
christian koenig
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,
			bool interruptible,
			bool no_wait_gpu)
{
	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;

	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)
			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,
						interruptible, no_wait_gpu);
		if (ret == 0 && mem->mm_node) {
			mem->placement = cur_flags;
			return 0;
		}
		if (ret == -ERESTARTSYS)
			has_erestartsys = true;
	}

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

	return (has_erestartsys) ? -ERESTARTSYS : -ENOMEM;
}
Contributors
Person
Tokens
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Commits
CommitProp
thomas hellstrom
thomas hellstrom
373
74.16%
5
45.45%
jerome glisse
jerome glisse
77
15.31%
2
18.18%
christian koenig
christian koenig
35
6.96%
2
18.18%
ben skeggs
ben skeggs
15
2.98%
1
9.09%
dave airlie
dave airlie
3
0.60%
1
9.09%
Total
503
100.00%
11
100.00%


EXPORT_SYMBOL(ttm_bo_mem_space);



static int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
			struct ttm_placement *placement,
			bool interruptible,
			bool no_wait_gpu)
{
	int ret = 0;
	struct ttm_mem_reg mem;

	lockdep_assert_held(&bo->resv->lock.base);

	/*
         * Don't wait for the BO on initial allocation. This is important when
         * the BO has an imported reservation object.
         */
	if (bo->mem.mem_type != TTM_PL_SYSTEM || bo->ttm != NULL) {
		/*
                 * FIXME: It's possible to pipeline buffer moves.
                 * Have the driver move function wait for idle when necessary,
                 * instead of doing it here.
                 */
		ret = ttm_bo_wait(bo, interruptible, no_wait_gpu);
		if (ret)
			return ret;
	}
	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,
			       interruptible, no_wait_gpu);
	if (ret)
		goto out_unlock;
	ret = ttm_bo_handle_move_mem(bo, &mem, false,
				     interruptible, no_wait_gpu);
out_unlock:
	if (ret && mem.mm_node)
		ttm_bo_mem_put(bo, &mem);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
138
74.19%
2
22.22%
christian koenig
christian koenig
20
10.75%
1
11.11%
jerome glisse
jerome glisse
16
8.60%
3
33.33%
maarten lankhorst
maarten lankhorst
8
4.30%
1
11.11%
ben skeggs
ben skeggs
3
1.61%
1
11.11%
rashika kheria
rashika kheria
1
0.54%
1
11.11%
Total
186
100.00%
9
100.00%



bool ttm_bo_mem_compat(struct ttm_placement *placement,
		       struct ttm_mem_reg *mem,
		       uint32_t *new_flags)
{
	int i;

	for (i = 0; i < placement->num_placement; i++) {
		const struct ttm_place *heap = &placement->placement[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))
			return true;
	}

	for (i = 0; i < placement->num_busy_placement; i++) {
		const struct ttm_place *heap = &placement->busy_placement[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))
			return true;
	}

	return false;
}
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Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
111
47.64%
3
42.86%
christian koenig
christian koenig
78
33.48%
1
14.29%
michel danzer
michel danzer
20
8.58%
1
14.29%
jerome glisse
jerome glisse
18
7.73%
1
14.29%
ben skeggs
ben skeggs
6
2.58%
1
14.29%
Total
233
100.00%
7
100.00%


EXPORT_SYMBOL(ttm_bo_mem_compat);



int ttm_bo_validate(struct ttm_buffer_object *bo,
			struct ttm_placement *placement,
			bool interruptible,
			bool no_wait_gpu)
{
	int ret;
	uint32_t new_flags;

	lockdep_assert_held(&bo->resv->lock.base);
	/*
         * Check whether we need to move buffer.
         */
	if (!ttm_bo_mem_compat(placement, &bo->mem, &new_flags)) {
		ret = ttm_bo_move_buffer(bo, placement, interruptible,
					 no_wait_gpu);
		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_bo_add_ttm(bo, true);
		if (ret)
			return ret;
	}
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
101
74.81%
2
33.33%
jerome glisse
jerome glisse
26
19.26%
3
50.00%
maarten lankhorst
maarten lankhorst
8
5.93%
1
16.67%
Total
135
100.00%
6
100.00%


EXPORT_SYMBOL(ttm_bo_validate);



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,
		struct file *persistent_swap_storage,
		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, false, false);
	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;

	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->glob = bdev->glob;
	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->priv_flags = 0;
	bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED);
	bo->persistent_swap_storage = persistent_swap_storage;
	bo->acc_size = acc_size;
	bo->sg = sg;
	if (resv) {
		bo->resv = resv;
		lockdep_assert_held(&bo->resv->lock.base);
	} else {
		bo->resv = &bo->ttm_resv;
		reservation_object_init(&bo->ttm_resv);
	}
	atomic_inc(&bo->glob->bo_count);
	drm_vma_node_reset(&bo->vma_node);

	/*
         * 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 = ww_mutex_trylock(&bo->resv->lock);
		WARN_ON(!locked);
	}

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

	if (!resv) {
		ttm_bo_unreserve(bo);

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

	if (unlikely(ret))
		ttm_bo_unref(&bo);

	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
333
55.69%
6
31.58%
maarten lankhorst
maarten lankhorst
93
15.55%
2
10.53%
jerome glisse
jerome glisse
80
13.38%
5
26.32%
christian koenig
christian koenig
43
7.19%
1
5.26%
david herrmann
david herrmann
23
3.85%
2
10.53%
dave airlie
dave airlie
17
2.84%
1
5.26%
joe perches
joe perches
6
1.00%
1
5.26%
jan engelhardt
jan engelhardt
3
0.50%
1
5.26%
Total
598
100.00%
19
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
jerome glisse
jerome glisse
50
73.53%
1
33.33%
thomas hellstrom
thomas hellstrom
17
25.00%
1
33.33%
felix kuehling
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
jerome glisse
jerome glisse
66
85.71%
1
33.33%
felix kuehling
felix kuehling
6
7.79%
1
33.33%
thomas hellstrom
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 file *persistent_swap_storage,
			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, persistent_swap_storage, acc_size,
			  NULL, NULL, NULL);
	if (likely(ret == 0))
		*p_bo = bo;

	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
77
55.80%
2
25.00%
jerome glisse
jerome glisse
55
39.86%
3
37.50%
jan engelhardt
jan engelhardt
2
1.45%
1
12.50%
maarten lankhorst
maarten lankhorst
2
1.45%
1
12.50%
dave airlie
dave airlie
2
1.45%
1
12.50%
Total
138
100.00%
8
100.00%


EXPORT_SYMBOL(ttm_bo_create);



static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev,
					unsigned mem_type, bool allow_errors)
{
	struct ttm_mem_type_manager *man = &bdev->man[mem_type];
	struct ttm_bo_global *glob = bdev->glob;
	int ret;

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

	spin_lock(&glob->lru_lock);
	while (!list_empty(&man->lru)) {
		spin_unlock(&glob->lru_lock);
		ret = ttm_mem_evict_first(bdev, mem_type, NULL, false, false);
		if (ret) {
			if (allow_errors) {
				return ret;
			} else {
				pr_err("Cleanup eviction failed\n");
			}
		}
		spin_lock(&glob->lru_lock);
	}
	spin_unlock(&glob->lru_lock);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
86
66.67%
2
40.00%
jerome glisse
jerome glisse
39
30.23%
1
20.00%
michel danzer
michel danzer
2
1.55%
1
20.00%
joe perches
joe perches
2
1.55%
1
20.00%
Total
129
100.00%
5
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) {
		ttm_bo_force_list_clean(bdev, mem_type, false);

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

	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
96
79.34%
1
25.00%
roel kluin
roel kluin
10
8.26%
1
25.00%
ben skeggs
ben skeggs
8
6.61%
1
25.00%
joe perches
joe perches
7
5.79%
1
25.00%
Total
121
100.00%
4
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, true);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
70
89.74%
1
50.00%
joe perches
joe perches
8
10.26%
1
50.00%
Total
78
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 = -EINVAL;
	struct ttm_mem_type_manager *man;

	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);
	INIT_LIST_HEAD(&man->io_reserve_lru);

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

	ret = 0;
	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;

	INIT_LIST_HEAD(&man->lru);

	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
158
91.86%
3
75.00%
ben skeggs
ben skeggs
14
8.14%
1
25.00%
Total
172
100.00%
4
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);

	ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink);
	__free_page(glob->dummy_read_page);
	kfree(glob);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
50
100.00%
2
100.00%
Total
50
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
thomas hellstrom
34
97.14%
1
50.00%
dave airlie
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;

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

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

	INIT_LIST_HEAD(&glob->swap_lru);
	INIT_LIST_HEAD(&glob->device_list);

	ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout);
	ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink);
	if (unlikely(ret != 0)) {
		pr_err("Could not register buffer object swapout\n");
		goto out_no_shrink;
	}

	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_shrink:
	__free_page(glob->dummy_read_page);
out_no_drp:
	kfree(glob);
	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
212
96.80%
1
25.00%
joe perches
joe perches
3
1.37%
1
25.00%
robert p. j. day
robert p. j. day
3
1.37%
1
25.00%
dave airlie
dave airlie
1
0.46%
1
25.00%
Total
219
100.00%
4
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);

	while (ttm_bo_delayed_delete(bdev, true))
		;

	spin_lock(&glob->lru_lock);
	if (list_empty(&bdev->ddestroy))
		TTM_DEBUG("Delayed destroy list was clean\n");

	if (list_empty(&bdev->man[0].lru))
		TTM_DEBUG("Swap list was clean\n");
	spin_unlock(&glob->lru_lock);

	drm_vma_offset_manager_destroy(&bdev->vma_manager);

	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
197
96.57%
2
40.00%
joe perches
joe perches
4
1.96%
1
20.00%
david herrmann
david herrmann
2
0.98%
1
20.00%
tejun heo
tejun heo
1
0.49%
1
20.00%
Total
204
100.00%
5
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
thomas hellstrom
151
89.88%
2
40.00%
dave airlie
dave airlie
9
5.36%
1
20.00%
david herrmann
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
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
thomas hellstrom
30
83.33%
2
40.00%
david herrmann
david herrmann
5
13.89%
2
40.00%
jerome glisse
jerome 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
thomas hellstrom
46
86.79%
2
66.67%
jerome glisse
jerome 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)
{
	struct reservation_object_list *fobj;
	struct reservation_object *resv;
	struct fence *excl;
	long timeout = 15 * HZ;
	int i;

	resv = bo->resv;
	fobj = reservation_object_get_list(resv);
	excl = reservation_object_get_excl(resv);
	if (excl) {
		if (!fence_is_signaled(excl)) {
			if (no_wait)
				return -EBUSY;

			timeout = fence_wait_timeout(excl,
						     interruptible, timeout);
		}
	}

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

		if (!fence_is_signaled(fence)) {
			if (no_wait)
				return -EBUSY;

			timeout = fence_wait_timeout(fence,
						     interruptible, timeout);
		}
	}

	if (timeout < 0)
		return timeout;

	if (timeout == 0)
		return -EBUSY;

	reservation_object_add_excl_fence(resv, NULL);
	clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags);
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
maarten lankhorst
maarten lankhorst
141
67.46%
3
42.86%
thomas hellstrom
thomas hellstrom
46
22.01%
2
28.57%
dave airlie
dave airlie
20
9.57%
1
14.29%
marek olsak
marek olsak
2
0.96%
1
14.29%
Total
209
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
thomas hellstrom
79
98.75%
2
66.67%
martin kepplinger
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
thomas hellstrom
17
94.44%
1
50.00%
maarten lankhorst
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.
 */



static int ttm_bo_swapout(struct ttm_mem_shrink *shrink)
{
	struct ttm_bo_global *glob =
	    container_of(shrink, struct ttm_bo_global, shrink);
	struct ttm_buffer_object *bo;
	int ret = -EBUSY;
	int put_count;
	uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM);

	spin_lock(&glob->lru_lock);
	list_for_each_entry(bo, &glob->swap_lru, swap) {
		ret = __ttm_bo_reserve(bo, false, true, NULL);
		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_and_unlock(bo, false, false);
		kref_put(&bo->list_kref, ttm_bo_release_list);
		return ret;
	}

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

	ttm_bo_list_ref_sub(bo, put_count, true);

	/**
         * Wait for GPU, then move to system cached.
         */

	ret = ttm_bo_wait(bo, false, false);

	if (unlikely(ret != 0))
		goto out;

	if ((bo->mem.placement & swap_placement) != swap_placement) {
		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,
					     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.
         */

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

Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
295
89.12%
5
55.56%
maarten lankhorst
maarten lankhorst
30
9.06%
1
11.11%
dave airlie
dave airlie
4
1.21%
1
11.11%
martin kepplinger
martin kepplinger
1
0.30%
1
11.11%
jan engelhardt
jan engelhardt
1
0.30%
1
11.11%
Total
331
100.00%
9
100.00%



void ttm_bo_swapout_all(struct ttm_bo_device *bdev)
{
	while (ttm_bo_swapout(&bdev->glob->shrink) == 0)
		;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
25
100.00%
2
100.00%
Total
25
100.00%
2
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 = __ttm_bo_reserve(bo, true, false, NULL);
	if (unlikely(ret != 0))
		goto out_unlock;
	__ttm_bo_unreserve(bo);

out_unlock:
	mutex_unlock(&bo->wu_mutex);
	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
96
100.00%
2
100.00%
Total
96
100.00%
2
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
5389
65.18%
34
31.19%
jerome glisse
jerome glisse
905
10.95%
11
10.09%
maarten lankhorst
maarten lankhorst
720
8.71%
16
14.68%
christian koenig
christian koenig
388
4.69%
8
7.34%
ben skeggs
ben skeggs
209
2.53%
7
6.42%
dave airlie
dave airlie
187
2.26%
9
8.26%
joe perches
joe perches
115
1.39%
1
0.92%
michel danzer
michel danzer
98
1.19%
2
1.83%
luca barbieri
luca barbieri
78
0.94%
1
0.92%
matthew garrett
matthew garrett
70
0.85%
1
0.92%
david herrmann
david herrmann
41
0.50%
4
3.67%
flora cui
flora cui
11
0.13%
1
0.92%
roel kluin
roel kluin
10
0.12%
1
0.92%
rob clark
rob clark
10
0.12%
1
0.92%
felix kuehling
felix kuehling
7
0.08%
1
0.92%
jan engelhardt
jan engelhardt
6
0.07%
1
0.92%
martin kepplinger
martin kepplinger
6
0.07%
1
0.92%
sinclair yeh
sinclair yeh
5
0.06%
1
0.92%
david howells
david howells
3
0.04%
1
0.92%
robert p. j. day
robert p. j. day
3
0.04%
1
0.92%
marek olsak
marek olsak
2
0.02%
1
0.92%
emese revfy
emese revfy
1
0.01%
1
0.92%
alex deucher
alex deucher
1
0.01%
1
0.92%
tejun heo
tejun heo
1
0.01%
1
0.92%
rashika kheria
rashika kheria
1
0.01%
1
0.92%
arun sharma
arun sharma
1
0.01%
1
0.92%
Total
8268
100.00%
109
100.00%
  
Directory: drivers/gpu/drm/ttm

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