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

/**************************************************************************
 *
 * Copyright (c) 2007-2009 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>
 */

#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/drm_vma_manager.h>
#include <linux/io.h>
#include <linux/highmem.h>
#include <linux/wait.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/module.h>
#include <linux/reservation.h>



void ttm_bo_free_old_node(struct ttm_buffer_object *bo)
{
	ttm_bo_mem_put(bo, &bo->mem);
}

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ben skeggs
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15.00%
1
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20
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2
100.00%



int ttm_bo_move_ttm(struct ttm_buffer_object *bo,
		    bool evict,
		    bool no_wait_gpu, struct ttm_mem_reg *new_mem)
{
	struct ttm_tt *ttm = bo->ttm;
	struct ttm_mem_reg *old_mem = &bo->mem;
	int ret;

	if (old_mem->mem_type != TTM_PL_SYSTEM) {
		ttm_tt_unbind(ttm);
		ttm_bo_free_old_node(bo);
		ttm_flag_masked(&old_mem->placement, TTM_PL_FLAG_SYSTEM,
				TTM_PL_MASK_MEM);
		old_mem->mem_type = TTM_PL_SYSTEM;
	}

	ret = ttm_tt_set_placement_caching(ttm, new_mem->placement);
	if (unlikely(ret != 0))
		return ret;

	if (new_mem->mem_type != TTM_PL_SYSTEM) {
		ret = ttm_tt_bind(ttm, new_mem);
		if (unlikely(ret != 0))
			return ret;
	}

	*old_mem = *new_mem;
	new_mem->mm_node = NULL;

	return 0;
}
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thomas hellstrom
thomas hellstrom
149
99.33%
1
50.00%
jerome glisse
jerome glisse
1
0.67%
1
50.00%
Total
150
100.00%
2
100.00%


EXPORT_SYMBOL(ttm_bo_move_ttm);



int ttm_mem_io_lock(struct ttm_mem_type_manager *man, bool interruptible)
{
	if (likely(man->io_reserve_fastpath))
		return 0;

	if (interruptible)
		return mutex_lock_interruptible(&man->io_reserve_mutex);

	mutex_lock(&man->io_reserve_mutex);
	return 0;
}
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thomas hellstrom
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1
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49
100.00%
1
100.00%


EXPORT_SYMBOL(ttm_mem_io_lock);



void ttm_mem_io_unlock(struct ttm_mem_type_manager *man)
{
	if (likely(man->io_reserve_fastpath))
		return;

	mutex_unlock(&man->io_reserve_mutex);
}
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thomas hellstrom
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1
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28
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1
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EXPORT_SYMBOL(ttm_mem_io_unlock);



static int ttm_mem_io_evict(struct ttm_mem_type_manager *man)
{
	struct ttm_buffer_object *bo;

	if (!man->use_io_reserve_lru || list_empty(&man->io_reserve_lru))
		return -EAGAIN;

	bo = list_first_entry(&man->io_reserve_lru,
			      struct ttm_buffer_object,
			      io_reserve_lru);
	list_del_init(&bo->io_reserve_lru);
	ttm_bo_unmap_virtual_locked(bo);

	return 0;
}


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thomas hellstrom
thomas hellstrom
66
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1
100.00%
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66
100.00%
1
100.00%



int ttm_mem_io_reserve(struct ttm_bo_device *bdev,
		       struct ttm_mem_reg *mem)
{
	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
	int ret = 0;

	if (!bdev->driver->io_mem_reserve)
		return 0;
	if (likely(man->io_reserve_fastpath))
		return bdev->driver->io_mem_reserve(bdev, mem);

	if (bdev->driver->io_mem_reserve &&
	    mem->bus.io_reserved_count++ == 0) {
retry:
		ret = bdev->driver->io_mem_reserve(bdev, mem);
		if (ret == -EAGAIN) {
			ret = ttm_mem_io_evict(man);
			if (ret == 0)
				goto retry;
		}
	}
	return ret;
}
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thomas hellstrom
thomas hellstrom
126
96.92%
2
66.67%
jerome glisse
jerome glisse
4
3.08%
1
33.33%
Total
130
100.00%
3
100.00%


EXPORT_SYMBOL(ttm_mem_io_reserve);



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

	if (likely(man->io_reserve_fastpath))
		return;

	if (bdev->driver->io_mem_reserve &&
	    --mem->bus.io_reserved_count == 0 &&
	    bdev->driver->io_mem_free)
		bdev->driver->io_mem_free(bdev, mem);

}
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thomas hellstrom
thomas hellstrom
69
93.24%
1
50.00%
jerome glisse
jerome glisse
5
6.76%
1
50.00%
Total
74
100.00%
2
100.00%


EXPORT_SYMBOL(ttm_mem_io_free);



int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo)
{
	struct ttm_mem_reg *mem = &bo->mem;
	int ret;

	if (!mem->bus.io_reserved_vm) {
		struct ttm_mem_type_manager *man =
			&bo->bdev->man[mem->mem_type];

		ret = ttm_mem_io_reserve(bo->bdev, mem);
		if (unlikely(ret != 0))
			return ret;
		mem->bus.io_reserved_vm = true;
		if (man->use_io_reserve_lru)
			list_add_tail(&bo->io_reserve_lru,
				      &man->io_reserve_lru);
	}
	return 0;
}

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thomas hellstrom
thomas hellstrom
75
72.12%
1
50.00%
jerome glisse
jerome glisse
29
27.88%
1
50.00%
Total
104
100.00%
2
100.00%



void ttm_mem_io_free_vm(struct ttm_buffer_object *bo)
{
	struct ttm_mem_reg *mem = &bo->mem;

	if (mem->bus.io_reserved_vm) {
		mem->bus.io_reserved_vm = false;
		list_del_init(&bo->io_reserve_lru);
		ttm_mem_io_free(bo->bdev, mem);
	}
}

Contributors
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jerome glisse
jerome glisse
28
50.91%
1
33.33%
thomas hellstrom
thomas hellstrom
27
49.09%
2
66.67%
Total
55
100.00%
3
100.00%



static int ttm_mem_reg_ioremap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,
			void **virtual)
{
	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
	int ret;
	void *addr;

	*virtual = NULL;
	(void) ttm_mem_io_lock(man, false);
	ret = ttm_mem_io_reserve(bdev, mem);
	ttm_mem_io_unlock(man);
	if (ret || !mem->bus.is_iomem)
		return ret;

	if (mem->bus.addr) {
		addr = mem->bus.addr;
	} else {
		if (mem->placement & TTM_PL_FLAG_WC)
			addr = ioremap_wc(mem->bus.base + mem->bus.offset, mem->bus.size);
		else
			addr = ioremap_nocache(mem->bus.base + mem->bus.offset, mem->bus.size);
		if (!addr) {
			(void) ttm_mem_io_lock(man, false);
			ttm_mem_io_free(bdev, mem);
			ttm_mem_io_unlock(man);
			return -ENOMEM;
		}
	}
	*virtual = addr;
	return 0;
}

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thomas hellstrom
thomas hellstrom
126
62.07%
2
40.00%
jerome glisse
jerome glisse
76
37.44%
2
40.00%
rashika kheria
rashika kheria
1
0.49%
1
20.00%
Total
203
100.00%
5
100.00%



static void ttm_mem_reg_iounmap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,
			 void *virtual)
{
	struct ttm_mem_type_manager *man;

	man = &bdev->man[mem->mem_type];

	if (virtual && mem->bus.addr == NULL)
		iounmap(virtual);
	(void) ttm_mem_io_lock(man, false);
	ttm_mem_io_free(bdev, mem);
	ttm_mem_io_unlock(man);
}

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thomas hellstrom
thomas hellstrom
62
81.58%
2
50.00%
jerome glisse
jerome glisse
13
17.11%
1
25.00%
rashika kheria
rashika kheria
1
1.32%
1
25.00%
Total
76
100.00%
4
100.00%



static int ttm_copy_io_page(void *dst, void *src, unsigned long page)
{
	uint32_t *dstP =
	    (uint32_t *) ((unsigned long)dst + (page << PAGE_SHIFT));
	uint32_t *srcP =
	    (uint32_t *) ((unsigned long)src + (page << PAGE_SHIFT));

	int i;
	for (i = 0; i < PAGE_SIZE / sizeof(uint32_t); ++i)
		iowrite32(ioread32(srcP++), dstP++);
	return 0;
}

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thomas hellstrom
thomas hellstrom
98
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98
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1
100.00%



static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src,
				unsigned long page,
				pgprot_t prot)
{
	struct page *d = ttm->pages[page];
	void *dst;

	if (!d)
		return -ENOMEM;

	src = (void *)((unsigned long)src + (page << PAGE_SHIFT));

#ifdef CONFIG_X86
	dst = kmap_atomic_prot(d, prot);
#else
	if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
		dst = vmap(&d, 1, 0, prot);
	else
		dst = kmap(d);
#endif
	if (!dst)
		return -ENOMEM;

	memcpy_fromio(dst, src, PAGE_SIZE);

#ifdef CONFIG_X86
	kunmap_atomic(dst);
#else
	if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
		vunmap(dst);
	else
		kunmap(d);
#endif

	return 0;
}

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thomas hellstrom
thomas hellstrom
169
97.69%
3
75.00%
jerome glisse
jerome glisse
4
2.31%
1
25.00%
Total
173
100.00%
4
100.00%



static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst,
				unsigned long page,
				pgprot_t prot)
{
	struct page *s = ttm->pages[page];
	void *src;

	if (!s)
		return -ENOMEM;

	dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT));
#ifdef CONFIG_X86
	src = kmap_atomic_prot(s, prot);
#else
	if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
		src = vmap(&s, 1, 0, prot);
	else
		src = kmap(s);
#endif
	if (!src)
		return -ENOMEM;

	memcpy_toio(dst, src, PAGE_SIZE);

#ifdef CONFIG_X86
	kunmap_atomic(src);
#else
	if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
		vunmap(src);
	else
		kunmap(s);
#endif

	return 0;
}

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thomas hellstrom
169
97.69%
3
75.00%
jerome glisse
jerome glisse
4
2.31%
1
25.00%
Total
173
100.00%
4
100.00%



int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
		       bool evict, bool no_wait_gpu,
		       struct ttm_mem_reg *new_mem)
{
	struct ttm_bo_device *bdev = bo->bdev;
	struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type];
	struct ttm_tt *ttm = bo->ttm;
	struct ttm_mem_reg *old_mem = &bo->mem;
	struct ttm_mem_reg old_copy = *old_mem;
	void *old_iomap;
	void *new_iomap;
	int ret;
	unsigned long i;
	unsigned long page;
	unsigned long add = 0;
	int dir;

	ret = ttm_mem_reg_ioremap(bdev, old_mem, &old_iomap);
	if (ret)
		return ret;
	ret = ttm_mem_reg_ioremap(bdev, new_mem, &new_iomap);
	if (ret)
		goto out;

	/*
         * Single TTM move. NOP.
         */
	if (old_iomap == NULL && new_iomap == NULL)
		goto out2;

	/*
         * Don't move nonexistent data. Clear destination instead.
         */
	if (old_iomap == NULL &&
	    (ttm == NULL || (ttm->state == tt_unpopulated &&
			     !(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)))) {
		memset_io(new_iomap, 0, new_mem->num_pages*PAGE_SIZE);
		goto out2;
	}

	/*
         * TTM might be null for moves within the same region.
         */
	if (ttm && ttm->state == tt_unpopulated) {
		ret = ttm->bdev->driver->ttm_tt_populate(ttm);
		if (ret)
			goto out1;
	}

	add = 0;
	dir = 1;

	if ((old_mem->mem_type == new_mem->mem_type) &&
	    (new_mem->start < old_mem->start + old_mem->size)) {
		dir = -1;
		add = new_mem->num_pages - 1;
	}

	for (i = 0; i < new_mem->num_pages; ++i) {
		page = i * dir + add;
		if (old_iomap == NULL) {
			pgprot_t prot = ttm_io_prot(old_mem->placement,
						    PAGE_KERNEL);
			ret = ttm_copy_ttm_io_page(ttm, new_iomap, page,
						   prot);
		} else if (new_iomap == NULL) {
			pgprot_t prot = ttm_io_prot(new_mem->placement,
						    PAGE_KERNEL);
			ret = ttm_copy_io_ttm_page(ttm, old_iomap, page,
						   prot);
		} else
			ret = ttm_copy_io_page(new_iomap, old_iomap, page);
		if (ret)
			goto out1;
	}
	mb();
out2:
	old_copy = *old_mem;
	*old_mem = *new_mem;
	new_mem->mm_node = NULL;

	if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && (ttm != NULL)) {
		ttm_tt_unbind(ttm);
		ttm_tt_destroy(ttm);
		bo->ttm = NULL;
	}

out1:
	ttm_mem_reg_iounmap(bdev, old_mem, new_iomap);
out:
	ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap);

	/*
         * On error, keep the mm node!
         */
	if (!ret)
		ttm_bo_mem_put(bo, &old_copy);
	return ret;
}
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thomas hellstrom
thomas hellstrom
447
91.60%
7
63.64%
jerome glisse
jerome glisse
31
6.35%
2
18.18%
ben skeggs
ben skeggs
8
1.64%
1
9.09%
jakob bornecrantz
jakob bornecrantz
2
0.41%
1
9.09%
Total
488
100.00%
11
100.00%


EXPORT_SYMBOL(ttm_bo_move_memcpy);



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

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thomas hellstrom
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16
100.00%
1
100.00%

/**
 * ttm_buffer_object_transfer
 *
 * @bo: A pointer to a struct ttm_buffer_object.
 * @new_obj: A pointer to a pointer to a newly created ttm_buffer_object,
 * holding the data of @bo with the old placement.
 *
 * This is a utility function that may be called after an accelerated move
 * has been scheduled. A new buffer object is created as a placeholder for
 * the old data while it's being copied. When that buffer object is idle,
 * it can be destroyed, releasing the space of the old placement.
 * Returns:
 * !0: Failure.
 */



static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo,
				      struct ttm_buffer_object **new_obj)
{
	struct ttm_buffer_object *fbo;
	int ret;

	fbo = kmalloc(sizeof(*fbo), GFP_KERNEL);
	if (!fbo)
		return -ENOMEM;

	*fbo = *bo;

	/**
         * Fix up members that we shouldn't copy directly:
         * TODO: Explicit member copy would probably be better here.
         */

	INIT_LIST_HEAD(&fbo->ddestroy);
	INIT_LIST_HEAD(&fbo->lru);
	INIT_LIST_HEAD(&fbo->swap);
	INIT_LIST_HEAD(&fbo->io_reserve_lru);
	drm_vma_node_reset(&fbo->vma_node);
	atomic_set(&fbo->cpu_writers, 0);

	kref_init(&fbo->list_kref);
	kref_init(&fbo->kref);
	fbo->destroy = &ttm_transfered_destroy;
	fbo->acc_size = 0;
	fbo->resv = &fbo->ttm_resv;
	reservation_object_init(fbo->resv);
	ret = ww_mutex_trylock(&fbo->resv->lock);
	WARN_ON(!ret);

	*new_obj = fbo;
	return 0;
}

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thomas hellstrom
thomas hellstrom
116
66.29%
2
28.57%
maarten lankhorst
maarten lankhorst
37
21.14%
1
14.29%
francisco jerez
francisco jerez
10
5.71%
1
14.29%
jerome glisse
jerome glisse
6
3.43%
1
14.29%
david herrmann
david herrmann
5
2.86%
1
14.29%
daniel vetter
daniel vetter
1
0.57%
1
14.29%
Total
175
100.00%
7
100.00%



pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp)
{
	/* Cached mappings need no adjustment */
	if (caching_flags & TTM_PL_FLAG_CACHED)
		return tmp;

#if defined(__i386__) || defined(__x86_64__)
	if (caching_flags & TTM_PL_FLAG_WC)
		tmp = pgprot_writecombine(tmp);
	else if (boot_cpu_data.x86 > 3)
		tmp = pgprot_noncached(tmp);
#endif
#if defined(__ia64__) || defined(__arm__) || defined(__aarch64__) || \
    defined(__powerpc__)
	if (caching_flags & TTM_PL_FLAG_WC)
		tmp = pgprot_writecombine(tmp);
	else
		tmp = pgprot_noncached(tmp);
#endif
#if defined(__sparc__) || defined(__mips__)
	tmp = pgprot_noncached(tmp);
#endif
	return tmp;
}
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thomas hellstrom
thomas hellstrom
100
76.34%
1
20.00%
benjamin herrenschmidt
benjamin herrenschmidt
15
11.45%
1
20.00%
alexandre courbot
alexandre courbot
6
4.58%
1
20.00%
huacai chen
huacai chen
5
3.82%
1
20.00%
lucas stach
lucas stach
5
3.82%
1
20.00%
Total
131
100.00%
5
100.00%


EXPORT_SYMBOL(ttm_io_prot);



static int ttm_bo_ioremap(struct ttm_buffer_object *bo,
			  unsigned long offset,
			  unsigned long size,
			  struct ttm_bo_kmap_obj *map)
{
	struct ttm_mem_reg *mem = &bo->mem;

	if (bo->mem.bus.addr) {
		map->bo_kmap_type = ttm_bo_map_premapped;
		map->virtual = (void *)(((u8 *)bo->mem.bus.addr) + offset);
	} else {
		map->bo_kmap_type = ttm_bo_map_iomap;
		if (mem->placement & TTM_PL_FLAG_WC)
			map->virtual = ioremap_wc(bo->mem.bus.base + bo->mem.bus.offset + offset,
						  size);
		else
			map->virtual = ioremap_nocache(bo->mem.bus.base + bo->mem.bus.offset + offset,
						       size);
	}
	return (!map->virtual) ? -ENOMEM : 0;
}

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thomas hellstrom
thomas hellstrom
114
69.94%
1
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jerome glisse
49
30.06%
1
50.00%
Total
163
100.00%
2
100.00%



static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo,
			   unsigned long start_page,
			   unsigned long num_pages,
			   struct ttm_bo_kmap_obj *map)
{
	struct ttm_mem_reg *mem = &bo->mem; pgprot_t prot;
	struct ttm_tt *ttm = bo->ttm;
	int ret;

	BUG_ON(!ttm);

	if (ttm->state == tt_unpopulated) {
		ret = ttm->bdev->driver->ttm_tt_populate(ttm);
		if (ret)
			return ret;
	}

	if (num_pages == 1 && (mem->placement & TTM_PL_FLAG_CACHED)) {
		/*
                 * We're mapping a single page, and the desired
                 * page protection is consistent with the bo.
                 */

		map->bo_kmap_type = ttm_bo_map_kmap;
		map->page = ttm->pages[start_page];
		map->virtual = kmap(map->page);
	} else {
		/*
                 * We need to use vmap to get the desired page protection
                 * or to make the buffer object look contiguous.
                 */
		prot = ttm_io_prot(mem->placement, PAGE_KERNEL);
		map->bo_kmap_type = ttm_bo_map_vmap;
		map->virtual = vmap(ttm->pages + start_page, num_pages,
				    0, prot);
	}
	return (!map->virtual) ? -ENOMEM : 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
147
80.33%
1
33.33%
jerome glisse
jerome glisse
35
19.13%
1
33.33%
andre goddard rosa
andre goddard rosa
1
0.55%
1
33.33%
Total
183
100.00%
3
100.00%



int ttm_bo_kmap(struct ttm_buffer_object *bo,
		unsigned long start_page, unsigned long num_pages,
		struct ttm_bo_kmap_obj *map)
{
	struct ttm_mem_type_manager *man =
		&bo->bdev->man[bo->mem.mem_type];
	unsigned long offset, size;
	int ret;

	BUG_ON(!list_empty(&bo->swap));
	map->virtual = NULL;
	map->bo = bo;
	if (num_pages > bo->num_pages)
		return -EINVAL;
	if (start_page > bo->num_pages)
		return -EINVAL;
#if 0
	if (num_pages > 1 && !capable(CAP_SYS_ADMIN))
                return -EPERM;
#endif
	(void) ttm_mem_io_lock(man, false);
	ret = ttm_mem_io_reserve(bo->bdev, &bo->mem);
	ttm_mem_io_unlock(man);
	if (ret)
		return ret;
	if (!bo->mem.bus.is_iomem) {
		return ttm_bo_kmap_ttm(bo, start_page, num_pages, map);
	} else {
		offset = start_page << PAGE_SHIFT;
		size = num_pages << PAGE_SHIFT;
		return ttm_bo_ioremap(bo, offset, size, map);
	}
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
167
86.53%
2
50.00%
jerome glisse
jerome glisse
25
12.95%
1
25.00%
daniel vetter
daniel vetter
1
0.52%
1
25.00%
Total
193
100.00%
4
100.00%


EXPORT_SYMBOL(ttm_bo_kmap);



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

	if (!map->virtual)
		return;
	switch (map->bo_kmap_type) {
	case ttm_bo_map_iomap:
		iounmap(map->virtual);
		break;
	case ttm_bo_map_vmap:
		vunmap(map->virtual);
		break;
	case ttm_bo_map_kmap:
		kunmap(map->page);
		break;
	case ttm_bo_map_premapped:
		break;
	default:
		BUG();
	}
	(void) ttm_mem_io_lock(man, false);
	ttm_mem_io_free(map->bo->bdev, &map->bo->mem);
	ttm_mem_io_unlock(man);
	map->virtual = NULL;
	map->page = NULL;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
138
100.00%
2
100.00%
Total
138
100.00%
2
100.00%


EXPORT_SYMBOL(ttm_bo_kunmap);



int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
			      struct fence *fence,
			      bool evict,
			      bool no_wait_gpu,
			      struct ttm_mem_reg *new_mem)
{
	struct ttm_bo_device *bdev = bo->bdev;
	struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type];
	struct ttm_mem_reg *old_mem = &bo->mem;
	int ret;
	struct ttm_buffer_object *ghost_obj;

	reservation_object_add_excl_fence(bo->resv, fence);
	if (evict) {
		ret = ttm_bo_wait(bo, false, false);
		if (ret)
			return ret;

		if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
		    (bo->ttm != NULL)) {
			ttm_tt_unbind(bo->ttm);
			ttm_tt_destroy(bo->ttm);
			bo->ttm = NULL;
		}
		ttm_bo_free_old_node(bo);
	} else {
		/**
                 * This should help pipeline ordinary buffer moves.
                 *
                 * Hang old buffer memory on a new buffer object,
                 * and leave it to be released when the GPU
                 * operation has completed.
                 */

		set_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags);

		ret = ttm_buffer_object_transfer(bo, &ghost_obj);
		if (ret)
			return ret;

		reservation_object_add_excl_fence(ghost_obj->resv, fence);

		/**
                 * If we're not moving to fixed memory, the TTM object
                 * needs to stay alive. Otherwhise hang it on the ghost
                 * bo to be unbound and destroyed.
                 */

		if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED))
			ghost_obj->ttm = NULL;
		else
			bo->ttm = NULL;

		ttm_bo_unreserve(ghost_obj);
		ttm_bo_unref(&ghost_obj);
	}

	*old_mem = *new_mem;
	new_mem->mm_node = NULL;

	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
204
86.08%
2
33.33%
maarten lankhorst
maarten lankhorst
17
7.17%
1
16.67%
daniel vetter
daniel vetter
10
4.22%
1
16.67%
ben skeggs
ben skeggs
5
2.11%
1
16.67%
jerome glisse
jerome glisse
1
0.42%
1
16.67%
Total
237
100.00%
6
100.00%


EXPORT_SYMBOL(ttm_bo_move_accel_cleanup);
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas hellstrom
thomas hellstrom
2731
85.18%
10
29.41%
jerome glisse
jerome glisse
311
9.70%
5
14.71%
maarten lankhorst
maarten lankhorst
57
1.78%
2
5.88%
dave airlie
dave airlie
20
0.62%
1
2.94%
ben skeggs
ben skeggs
16
0.50%
3
8.82%
benjamin herrenschmidt
benjamin herrenschmidt
15
0.47%
1
2.94%
daniel vetter
daniel vetter
12
0.37%
2
5.88%
francisco jerez
francisco jerez
10
0.31%
1
2.94%
david herrmann
david herrmann
8
0.25%
1
2.94%
alexandre courbot
alexandre courbot
6
0.19%
1
2.94%
lucas stach
lucas stach
5
0.16%
1
2.94%
huacai chen
huacai chen
5
0.16%
1
2.94%
tejun heo
tejun heo
3
0.09%
1
2.94%
rashika kheria
rashika kheria
2
0.06%
1
2.94%
david howells
david howells
2
0.06%
1
2.94%
jakob bornecrantz
jakob bornecrantz
2
0.06%
1
2.94%
andre goddard rosa
andre goddard rosa
1
0.03%
1
2.94%
Total
3206
100.00%
34
100.00%
  
Directory: drivers/gpu/drm/ttm

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