[linux-2.6-block.git] / arch / arm64 / mm / dma-mapping.c

/*
 * SWIOTLB-based DMA API implementation
 *
 * Copyright (C) 2012 ARM Ltd.
 * Author: Catalin Marinas <catalin.marinas@arm.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <linux/gfp.h>
#include <linux/export.h>
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <linux/dma-contiguous.h>
#include <linux/vmalloc.h>
#include <linux/swiotlb.h>

#include <asm/cacheflush.h>

struct dma_map_ops *dma_ops;
EXPORT_SYMBOL(dma_ops);

static void *__dma_alloc_coherent(struct device *dev, size_t size,
				  dma_addr_t *dma_handle, gfp_t flags,
				  struct dma_attrs *attrs)
{
	if (dev == NULL) {
		WARN_ONCE(1, "Use an actual device structure for DMA allocation\n");
		return NULL;
	}

	if (IS_ENABLED(CONFIG_ZONE_DMA) &&
	    dev->coherent_dma_mask <= DMA_BIT_MASK(32))
		flags |= GFP_DMA;
	if (IS_ENABLED(CONFIG_DMA_CMA)) {
		struct page *page;

		size = PAGE_ALIGN(size);
		page = dma_alloc_from_contiguous(dev, size >> PAGE_SHIFT,
							get_order(size));
		if (!page)
			return NULL;

		*dma_handle = phys_to_dma(dev, page_to_phys(page));
		return page_address(page);
	} else {
		return swiotlb_alloc_coherent(dev, size, dma_handle, flags);
	}
}

static void __dma_free_coherent(struct device *dev, size_t size,
				void *vaddr, dma_addr_t dma_handle,
				struct dma_attrs *attrs)
{
	if (dev == NULL) {
		WARN_ONCE(1, "Use an actual device structure for DMA allocation\n");
		return;
	}

	if (IS_ENABLED(CONFIG_DMA_CMA)) {
		phys_addr_t paddr = dma_to_phys(dev, dma_handle);

		dma_release_from_contiguous(dev,
					phys_to_page(paddr),
					size >> PAGE_SHIFT);
	} else {
		swiotlb_free_coherent(dev, size, vaddr, dma_handle);
	}
}

static void *__dma_alloc_noncoherent(struct device *dev, size_t size,
				     dma_addr_t *dma_handle, gfp_t flags,
				     struct dma_attrs *attrs)
{
	struct page *page, **map;
	void *ptr, *coherent_ptr;
	int order, i;

	size = PAGE_ALIGN(size);
	order = get_order(size);

	ptr = __dma_alloc_coherent(dev, size, dma_handle, flags, attrs);
	if (!ptr)
		goto no_mem;
	map = kmalloc(sizeof(struct page *) << order, flags & ~GFP_DMA);
	if (!map)
		goto no_map;

	/* remove any dirty cache lines on the kernel alias */
	__dma_flush_range(ptr, ptr + size);

	/* create a coherent mapping */
	page = virt_to_page(ptr);
	for (i = 0; i < (size >> PAGE_SHIFT); i++)
		map[i] = page + i;
	coherent_ptr = vmap(map, size >> PAGE_SHIFT, VM_MAP,
			    pgprot_dmacoherent(pgprot_default));
	kfree(map);
	if (!coherent_ptr)
		goto no_map;

	return coherent_ptr;

no_map:
	__dma_free_coherent(dev, size, ptr, *dma_handle, attrs);
no_mem:
	*dma_handle = ~0;
	return NULL;
}

static void __dma_free_noncoherent(struct device *dev, size_t size,
				   void *vaddr, dma_addr_t dma_handle,
				   struct dma_attrs *attrs)
{
	void *swiotlb_addr = phys_to_virt(dma_to_phys(dev, dma_handle));

	vunmap(vaddr);
	__dma_free_coherent(dev, size, swiotlb_addr, dma_handle, attrs);
}

static dma_addr_t __swiotlb_map_page(struct device *dev, struct page *page,
				     unsigned long offset, size_t size,
				     enum dma_data_direction dir,
				     struct dma_attrs *attrs)
{
	dma_addr_t dev_addr;

	dev_addr = swiotlb_map_page(dev, page, offset, size, dir, attrs);
	__dma_map_area(phys_to_virt(dma_to_phys(dev, dev_addr)), size, dir);

	return dev_addr;
}


static void __swiotlb_unmap_page(struct device *dev, dma_addr_t dev_addr,
				 size_t size, enum dma_data_direction dir,
				 struct dma_attrs *attrs)
{
	__dma_unmap_area(phys_to_virt(dma_to_phys(dev, dev_addr)), size, dir);
	swiotlb_unmap_page(dev, dev_addr, size, dir, attrs);
}

static int __swiotlb_map_sg_attrs(struct device *dev, struct scatterlist *sgl,
				  int nelems, enum dma_data_direction dir,
				  struct dma_attrs *attrs)
{
	struct scatterlist *sg;
	int i, ret;

	ret = swiotlb_map_sg_attrs(dev, sgl, nelems, dir, attrs);
	for_each_sg(sgl, sg, ret, i)
		__dma_map_area(phys_to_virt(dma_to_phys(dev, sg->dma_address)),
			       sg->length, dir);

	return ret;
}

static void __swiotlb_unmap_sg_attrs(struct device *dev,
				     struct scatterlist *sgl, int nelems,
				     enum dma_data_direction dir,
				     struct dma_attrs *attrs)
{
	struct scatterlist *sg;
	int i;

	for_each_sg(sgl, sg, nelems, i)
		__dma_unmap_area(phys_to_virt(dma_to_phys(dev, sg->dma_address)),
				 sg->length, dir);
	swiotlb_unmap_sg_attrs(dev, sgl, nelems, dir, attrs);
}

static void __swiotlb_sync_single_for_cpu(struct device *dev,
					  dma_addr_t dev_addr, size_t size,
					  enum dma_data_direction dir)
{
	__dma_unmap_area(phys_to_virt(dma_to_phys(dev, dev_addr)), size, dir);
	swiotlb_sync_single_for_cpu(dev, dev_addr, size, dir);
}

static void __swiotlb_sync_single_for_device(struct device *dev,
					     dma_addr_t dev_addr, size_t size,
					     enum dma_data_direction dir)
{
	swiotlb_sync_single_for_device(dev, dev_addr, size, dir);
	__dma_map_area(phys_to_virt(dma_to_phys(dev, dev_addr)), size, dir);
}

static void __swiotlb_sync_sg_for_cpu(struct device *dev,
				      struct scatterlist *sgl, int nelems,
				      enum dma_data_direction dir)
{
	struct scatterlist *sg;
	int i;

	for_each_sg(sgl, sg, nelems, i)
		__dma_unmap_area(phys_to_virt(dma_to_phys(dev, sg->dma_address)),
				 sg->length, dir);
	swiotlb_sync_sg_for_cpu(dev, sgl, nelems, dir);
}

static void __swiotlb_sync_sg_for_device(struct device *dev,
					 struct scatterlist *sgl, int nelems,
					 enum dma_data_direction dir)
{
	struct scatterlist *sg;
	int i;

	swiotlb_sync_sg_for_device(dev, sgl, nelems, dir);
	for_each_sg(sgl, sg, nelems, i)
		__dma_map_area(phys_to_virt(dma_to_phys(dev, sg->dma_address)),
			       sg->length, dir);
}

/* vma->vm_page_prot must be set appropriately before calling this function */
static int __dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
			     void *cpu_addr, dma_addr_t dma_addr, size_t size)
{
	int ret = -ENXIO;
	unsigned long nr_vma_pages = (vma->vm_end - vma->vm_start) >>
					PAGE_SHIFT;
	unsigned long nr_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
	unsigned long pfn = dma_to_phys(dev, dma_addr) >> PAGE_SHIFT;
	unsigned long off = vma->vm_pgoff;

	if (dma_mmap_from_coherent(dev, vma, cpu_addr, size, &ret))
		return ret;

	if (off < nr_pages && nr_vma_pages <= (nr_pages - off)) {
		ret = remap_pfn_range(vma, vma->vm_start,
				      pfn + off,
				      vma->vm_end - vma->vm_start,
				      vma->vm_page_prot);
	}

	return ret;
}

static int __swiotlb_mmap_noncoherent(struct device *dev,
		struct vm_area_struct *vma,
		void *cpu_addr, dma_addr_t dma_addr, size_t size,
		struct dma_attrs *attrs)
{
	vma->vm_page_prot = pgprot_dmacoherent(vma->vm_page_prot);
	return __dma_common_mmap(dev, vma, cpu_addr, dma_addr, size);
}

static int __swiotlb_mmap_coherent(struct device *dev,
		struct vm_area_struct *vma,
		void *cpu_addr, dma_addr_t dma_addr, size_t size,
		struct dma_attrs *attrs)
{
	/* Just use whatever page_prot attributes were specified */
	return __dma_common_mmap(dev, vma, cpu_addr, dma_addr, size);
}

struct dma_map_ops noncoherent_swiotlb_dma_ops = {
	.alloc = __dma_alloc_noncoherent,
	.free = __dma_free_noncoherent,
	.mmap = __swiotlb_mmap_noncoherent,
	.map_page = __swiotlb_map_page,
	.unmap_page = __swiotlb_unmap_page,
	.map_sg = __swiotlb_map_sg_attrs,
	.unmap_sg = __swiotlb_unmap_sg_attrs,
	.sync_single_for_cpu = __swiotlb_sync_single_for_cpu,
	.sync_single_for_device = __swiotlb_sync_single_for_device,
	.sync_sg_for_cpu = __swiotlb_sync_sg_for_cpu,
	.sync_sg_for_device = __swiotlb_sync_sg_for_device,
	.dma_supported = swiotlb_dma_supported,
	.mapping_error = swiotlb_dma_mapping_error,
};
EXPORT_SYMBOL(noncoherent_swiotlb_dma_ops);

struct dma_map_ops coherent_swiotlb_dma_ops = {
	.alloc = __dma_alloc_coherent,
	.free = __dma_free_coherent,
	.mmap = __swiotlb_mmap_coherent,
	.map_page = swiotlb_map_page,
	.unmap_page = swiotlb_unmap_page,
	.map_sg = swiotlb_map_sg_attrs,
	.unmap_sg = swiotlb_unmap_sg_attrs,
	.sync_single_for_cpu = swiotlb_sync_single_for_cpu,
	.sync_single_for_device = swiotlb_sync_single_for_device,
	.sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
	.sync_sg_for_device = swiotlb_sync_sg_for_device,
	.dma_supported = swiotlb_dma_supported,
	.mapping_error = swiotlb_dma_mapping_error,
};
EXPORT_SYMBOL(coherent_swiotlb_dma_ops);

extern int swiotlb_late_init_with_default_size(size_t default_size);

static int __init swiotlb_late_init(void)
{
	size_t swiotlb_size = min(SZ_64M, MAX_ORDER_NR_PAGES << PAGE_SHIFT);

	dma_ops = &coherent_swiotlb_dma_ops;

	return swiotlb_late_init_with_default_size(swiotlb_size);
}
subsys_initcall(swiotlb_late_init);

#define PREALLOC_DMA_DEBUG_ENTRIES	4096

static int __init dma_debug_do_init(void)
{
	dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES);
	return 0;
}
fs_initcall(dma_debug_do_init);
Commit	Line	Data
09b55412 CM	1	/*
	2	* SWIOTLB-based DMA API implementation
	3	*
	4	* Copyright (C) 2012 ARM Ltd.
	5	* Author: Catalin Marinas <catalin.marinas@arm.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	#include <linux/gfp.h>
	21	#include <linux/export.h>
	22	#include <linux/slab.h>
	23	#include <linux/dma-mapping.h>
6ac2104d	24	#include <linux/dma-contiguous.h>
09b55412 CM	25	#include <linux/vmalloc.h>
	26	#include <linux/swiotlb.h>
	27
	28	#include <asm/cacheflush.h>
	29
	30	struct dma_map_ops *dma_ops;
	31	EXPORT_SYMBOL(dma_ops);
	32
bb10eb7b RH	33	static void __dma_alloc_coherent(struct device dev, size_t size,
	34	dma_addr_t *dma_handle, gfp_t flags,
	35	struct dma_attrs *attrs)
09b55412	36	{
c666e8d5 LA	37	if (dev == NULL) {
	38	WARN_ONCE(1, "Use an actual device structure for DMA allocation\n");
	39	return NULL;
	40	}
	41
19e7640d	42	if (IS_ENABLED(CONFIG_ZONE_DMA) &&
09b55412	43	dev->coherent_dma_mask <= DMA_BIT_MASK(32))
19e7640d	44	flags \|= GFP_DMA;
6ac2104d LA	45	if (IS_ENABLED(CONFIG_DMA_CMA)) {
	46	struct page *page;
	47
ccc9e244	48	size = PAGE_ALIGN(size);
6ac2104d LA	49	page = dma_alloc_from_contiguous(dev, size >> PAGE_SHIFT,
	50	get_order(size));
	51	if (!page)
	52	return NULL;
	53
	54	*dma_handle = phys_to_dma(dev, page_to_phys(page));
	55	return page_address(page);
	56	} else {
	57	return swiotlb_alloc_coherent(dev, size, dma_handle, flags);
	58	}
09b55412 CM	59	}
09b55412 CM	60
bb10eb7b RH	61	static void __dma_free_coherent(struct device *dev, size_t size,
	62	void *vaddr, dma_addr_t dma_handle,
	63	struct dma_attrs *attrs)
09b55412	64	{
c666e8d5 LA	65	if (dev == NULL) {
	66	WARN_ONCE(1, "Use an actual device structure for DMA allocation\n");
	67	return;
	68	}
	69
6ac2104d LA	70	if (IS_ENABLED(CONFIG_DMA_CMA)) {
	71	phys_addr_t paddr = dma_to_phys(dev, dma_handle);
	72
	73	dma_release_from_contiguous(dev,
	74	phys_to_page(paddr),
	75	size >> PAGE_SHIFT);
	76	} else {
	77	swiotlb_free_coherent(dev, size, vaddr, dma_handle);
	78	}
09b55412 CM	79	}
09b55412 CM	80
7363590d CM	81	static void __dma_alloc_noncoherent(struct device dev, size_t size,
	82	dma_addr_t *dma_handle, gfp_t flags,
	83	struct dma_attrs *attrs)
	84	{
	85	struct page page, *map;
	86	void ptr, coherent_ptr;
	87	int order, i;
	88
	89	size = PAGE_ALIGN(size);
	90	order = get_order(size);
	91
	92	ptr = __dma_alloc_coherent(dev, size, dma_handle, flags, attrs);
	93	if (!ptr)
	94	goto no_mem;
	95	map = kmalloc(sizeof(struct page *) << order, flags & ~GFP_DMA);
	96	if (!map)
	97	goto no_map;
	98
	99	/* remove any dirty cache lines on the kernel alias */
	100	__dma_flush_range(ptr, ptr + size);
	101
	102	/* create a coherent mapping */
	103	page = virt_to_page(ptr);
	104	for (i = 0; i < (size >> PAGE_SHIFT); i++)
	105	map[i] = page + i;
	106	coherent_ptr = vmap(map, size >> PAGE_SHIFT, VM_MAP,
	107	pgprot_dmacoherent(pgprot_default));
	108	kfree(map);
	109	if (!coherent_ptr)
	110	goto no_map;
	111
	112	return coherent_ptr;
	113
	114	no_map:
	115	__dma_free_coherent(dev, size, ptr, *dma_handle, attrs);
	116	no_mem:
	117	*dma_handle = ~0;
	118	return NULL;
	119	}
	120
	121	static void __dma_free_noncoherent(struct device *dev, size_t size,
	122	void *vaddr, dma_addr_t dma_handle,
	123	struct dma_attrs *attrs)
	124	{
	125	void *swiotlb_addr = phys_to_virt(dma_to_phys(dev, dma_handle));
	126
	127	vunmap(vaddr);
	128	__dma_free_coherent(dev, size, swiotlb_addr, dma_handle, attrs);
	129	}
	130
	131	static dma_addr_t __swiotlb_map_page(struct device dev, struct page page,
	132	unsigned long offset, size_t size,
	133	enum dma_data_direction dir,
	134	struct dma_attrs *attrs)
	135	{
	136	dma_addr_t dev_addr;
	137
	138	dev_addr = swiotlb_map_page(dev, page, offset, size, dir, attrs);
	139	__dma_map_area(phys_to_virt(dma_to_phys(dev, dev_addr)), size, dir);
	140
	141	return dev_addr;
	142	}
	143
	144
145	static void __swiotlb_unmap_page(struct device *dev, dma_addr_t dev_addr,
146	size_t size, enum dma_data_direction dir,
147	struct dma_attrs *attrs)
148	{
149	__dma_unmap_area(phys_to_virt(dma_to_phys(dev, dev_addr)), size, dir);
150	swiotlb_unmap_page(dev, dev_addr, size, dir, attrs);
151	}
152
153	static int __swiotlb_map_sg_attrs(struct device dev, struct scatterlist sgl,
154	int nelems, enum dma_data_direction dir,
155	struct dma_attrs *attrs)
156	{
157	struct scatterlist *sg;
158	int i, ret;
159
160	ret = swiotlb_map_sg_attrs(dev, sgl, nelems, dir, attrs);
161	for_each_sg(sgl, sg, ret, i)
162	__dma_map_area(phys_to_virt(dma_to_phys(dev, sg->dma_address)),
163	sg->length, dir);
164
165	return ret;
166	}
167
168	static void __swiotlb_unmap_sg_attrs(struct device *dev,
169	struct scatterlist *sgl, int nelems,
170	enum dma_data_direction dir,
171	struct dma_attrs *attrs)
172	{
173	struct scatterlist *sg;
174	int i;
175
176	for_each_sg(sgl, sg, nelems, i)
177	__dma_unmap_area(phys_to_virt(dma_to_phys(dev, sg->dma_address)),
178	sg->length, dir);
179	swiotlb_unmap_sg_attrs(dev, sgl, nelems, dir, attrs);
180	}
181
182	static void __swiotlb_sync_single_for_cpu(struct device *dev,
183	dma_addr_t dev_addr, size_t size,
184	enum dma_data_direction dir)
185	{
186	__dma_unmap_area(phys_to_virt(dma_to_phys(dev, dev_addr)), size, dir);
187	swiotlb_sync_single_for_cpu(dev, dev_addr, size, dir);
188	}
189
190	static void __swiotlb_sync_single_for_device(struct device *dev,
191	dma_addr_t dev_addr, size_t size,
192	enum dma_data_direction dir)
193	{
194	swiotlb_sync_single_for_device(dev, dev_addr, size, dir);
195	__dma_map_area(phys_to_virt(dma_to_phys(dev, dev_addr)), size, dir);
196	}
197
198	static void __swiotlb_sync_sg_for_cpu(struct device *dev,
199	struct scatterlist *sgl, int nelems,
200	enum dma_data_direction dir)
201	{
202	struct scatterlist *sg;
203	int i;
204
205	for_each_sg(sgl, sg, nelems, i)
206	__dma_unmap_area(phys_to_virt(dma_to_phys(dev, sg->dma_address)),
207	sg->length, dir);
208	swiotlb_sync_sg_for_cpu(dev, sgl, nelems, dir);
209	}
210
211	static void __swiotlb_sync_sg_for_device(struct device *dev,
212	struct scatterlist *sgl, int nelems,
213	enum dma_data_direction dir)
214	{
215	struct scatterlist *sg;
216	int i;
217
218	swiotlb_sync_sg_for_device(dev, sgl, nelems, dir);
219	for_each_sg(sgl, sg, nelems, i)
220	__dma_map_area(phys_to_virt(dma_to_phys(dev, sg->dma_address)),
221	sg->length, dir);
222	}
223
6e8d7968 LA	224	/* vma->vm_page_prot must be set appropriately before calling this function */
	225	static int __dma_common_mmap(struct device dev, struct vm_area_struct vma,
	226	void *cpu_addr, dma_addr_t dma_addr, size_t size)
	227	{
	228	int ret = -ENXIO;
	229	unsigned long nr_vma_pages = (vma->vm_end - vma->vm_start) >>
	230	PAGE_SHIFT;
	231	unsigned long nr_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
	232	unsigned long pfn = dma_to_phys(dev, dma_addr) >> PAGE_SHIFT;
	233	unsigned long off = vma->vm_pgoff;
	234
	235	if (dma_mmap_from_coherent(dev, vma, cpu_addr, size, &ret))
	236	return ret;
	237
	238	if (off < nr_pages && nr_vma_pages <= (nr_pages - off)) {
	239	ret = remap_pfn_range(vma, vma->vm_start,
	240	pfn + off,
	241	vma->vm_end - vma->vm_start,
	242	vma->vm_page_prot);
	243	}
	244
	245	return ret;
	246	}
	247
	248	static int __swiotlb_mmap_noncoherent(struct device *dev,
	249	struct vm_area_struct *vma,
	250	void *cpu_addr, dma_addr_t dma_addr, size_t size,
	251	struct dma_attrs *attrs)
	252	{
	253	vma->vm_page_prot = pgprot_dmacoherent(vma->vm_page_prot);
	254	return __dma_common_mmap(dev, vma, cpu_addr, dma_addr, size);
	255	}
	256
	257	static int __swiotlb_mmap_coherent(struct device *dev,
	258	struct vm_area_struct *vma,
	259	void *cpu_addr, dma_addr_t dma_addr, size_t size,
	260	struct dma_attrs *attrs)
	261	{
	262	/* Just use whatever page_prot attributes were specified */
	263	return __dma_common_mmap(dev, vma, cpu_addr, dma_addr, size);
	264	}
	265
7363590d CM	266	struct dma_map_ops noncoherent_swiotlb_dma_ops = {
	267	.alloc = __dma_alloc_noncoherent,
	268	.free = __dma_free_noncoherent,
6e8d7968	269	.mmap = __swiotlb_mmap_noncoherent,
7363590d CM	270	.map_page = __swiotlb_map_page,
	271	.unmap_page = __swiotlb_unmap_page,
	272	.map_sg = __swiotlb_map_sg_attrs,
	273	.unmap_sg = __swiotlb_unmap_sg_attrs,
	274	.sync_single_for_cpu = __swiotlb_sync_single_for_cpu,
	275	.sync_single_for_device = __swiotlb_sync_single_for_device,
	276	.sync_sg_for_cpu = __swiotlb_sync_sg_for_cpu,
	277	.sync_sg_for_device = __swiotlb_sync_sg_for_device,
	278	.dma_supported = swiotlb_dma_supported,
	279	.mapping_error = swiotlb_dma_mapping_error,
	280	};
	281	EXPORT_SYMBOL(noncoherent_swiotlb_dma_ops);
	282
	283	struct dma_map_ops coherent_swiotlb_dma_ops = {
bb10eb7b RH	284	.alloc = __dma_alloc_coherent,
bb10eb7b RH	285	.free = __dma_free_coherent,
6e8d7968	286	.mmap = __swiotlb_mmap_coherent,
09b55412 CM	287	.map_page = swiotlb_map_page,
	288	.unmap_page = swiotlb_unmap_page,
	289	.map_sg = swiotlb_map_sg_attrs,
	290	.unmap_sg = swiotlb_unmap_sg_attrs,
	291	.sync_single_for_cpu = swiotlb_sync_single_for_cpu,
	292	.sync_single_for_device = swiotlb_sync_single_for_device,
	293	.sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
	294	.sync_sg_for_device = swiotlb_sync_sg_for_device,
	295	.dma_supported = swiotlb_dma_supported,
	296	.mapping_error = swiotlb_dma_mapping_error,
	297	};
7363590d	298	EXPORT_SYMBOL(coherent_swiotlb_dma_ops);
09b55412	299
3690951f CM	300	extern int swiotlb_late_init_with_default_size(size_t default_size);
	301
	302	static int __init swiotlb_late_init(void)
09b55412	303	{
3690951f CM	304	size_t swiotlb_size = min(SZ_64M, MAX_ORDER_NR_PAGES << PAGE_SHIFT);
3690951f CM	305
bb10eb7b	306	dma_ops = &coherent_swiotlb_dma_ops;
3690951f CM	307
3690951f CM	308	return swiotlb_late_init_with_default_size(swiotlb_size);
09b55412	309	}
3690951f	310	subsys_initcall(swiotlb_late_init);
09b55412 CM	311
	312	#define PREALLOC_DMA_DEBUG_ENTRIES 4096
	313
	314	static int __init dma_debug_do_init(void)
	315	{
	316	dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES);
	317	return 0;
	318	}
	319	fs_initcall(dma_debug_do_init);