2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice unmodified, this list of conditions, and the following
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #ifndef _LINUX_DMA_MAPPING_H_
32 #define _LINUX_DMA_MAPPING_H_
34 #include <linux/types.h>
35 #include <linux/device.h>
36 #include <linux/err.h>
37 #include <linux/dma-attrs.h>
38 #include <linux/scatterlist.h>
40 #include <linux/page.h>
42 #include <sys/systm.h>
43 #include <sys/malloc.h>
46 #include <vm/vm_page.h>
49 #include <machine/bus.h>
51 enum dma_data_direction {
52 DMA_BIDIRECTIONAL = 0,
59 void* (*alloc_coherent)(struct device *dev, size_t size,
60 dma_addr_t *dma_handle, gfp_t gfp);
61 void (*free_coherent)(struct device *dev, size_t size,
62 void *vaddr, dma_addr_t dma_handle);
63 dma_addr_t (*map_page)(struct device *dev, struct page *page,
64 unsigned long offset, size_t size, enum dma_data_direction dir,
65 struct dma_attrs *attrs);
66 void (*unmap_page)(struct device *dev, dma_addr_t dma_handle,
67 size_t size, enum dma_data_direction dir, struct dma_attrs *attrs);
68 int (*map_sg)(struct device *dev, struct scatterlist *sg,
69 int nents, enum dma_data_direction dir, struct dma_attrs *attrs);
70 void (*unmap_sg)(struct device *dev, struct scatterlist *sg, int nents,
71 enum dma_data_direction dir, struct dma_attrs *attrs);
72 void (*sync_single_for_cpu)(struct device *dev, dma_addr_t dma_handle,
73 size_t size, enum dma_data_direction dir);
74 void (*sync_single_for_device)(struct device *dev,
75 dma_addr_t dma_handle, size_t size, enum dma_data_direction dir);
76 void (*sync_single_range_for_cpu)(struct device *dev,
77 dma_addr_t dma_handle, unsigned long offset, size_t size,
78 enum dma_data_direction dir);
79 void (*sync_single_range_for_device)(struct device *dev,
80 dma_addr_t dma_handle, unsigned long offset, size_t size,
81 enum dma_data_direction dir);
82 void (*sync_sg_for_cpu)(struct device *dev, struct scatterlist *sg,
83 int nents, enum dma_data_direction dir);
84 void (*sync_sg_for_device)(struct device *dev, struct scatterlist *sg,
85 int nents, enum dma_data_direction dir);
86 int (*mapping_error)(struct device *dev, dma_addr_t dma_addr);
87 int (*dma_supported)(struct device *dev, u64 mask);
91 #define DMA_BIT_MASK(n) ((2ULL << ((n) - 1)) - 1ULL)
93 int linux_dma_tag_init(struct device *dev, u64 mask);
94 void *linux_dma_alloc_coherent(struct device *dev, size_t size,
95 dma_addr_t *dma_handle, gfp_t flag);
96 dma_addr_t linux_dma_map_phys(struct device *dev, vm_paddr_t phys, size_t len);
97 void linux_dma_unmap(struct device *dev, dma_addr_t dma_addr, size_t size);
98 int linux_dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl,
99 int nents, enum dma_data_direction dir, struct dma_attrs *attrs);
100 void linux_dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg,
101 int nents, enum dma_data_direction dir, struct dma_attrs *attrs);
104 dma_supported(struct device *dev, u64 mask)
107 /* XXX busdma takes care of this elsewhere. */
112 dma_set_mask(struct device *dev, u64 dma_mask)
115 if (!dev->dma_priv || !dma_supported(dev, dma_mask))
118 return (linux_dma_tag_init(dev, dma_mask));
122 dma_set_coherent_mask(struct device *dev, u64 mask)
125 if (!dma_supported(dev, mask))
127 /* XXX Currently we don't support a separate coherent mask. */
132 dma_set_mask_and_coherent(struct device *dev, u64 mask)
136 r = dma_set_mask(dev, mask);
138 dma_set_coherent_mask(dev, mask);
143 dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
146 return (linux_dma_alloc_coherent(dev, size, dma_handle, flag));
150 dma_zalloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
154 return (dma_alloc_coherent(dev, size, dma_handle, flag | __GFP_ZERO));
158 dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
162 linux_dma_unmap(dev, dma_addr, size);
163 kmem_free((vm_offset_t)cpu_addr, size);
166 static inline dma_addr_t
167 dma_map_single_attrs(struct device *dev, void *ptr, size_t size,
168 enum dma_data_direction dir, struct dma_attrs *attrs)
171 return (linux_dma_map_phys(dev, vtophys(ptr), size));
175 dma_unmap_single_attrs(struct device *dev, dma_addr_t dma_addr, size_t size,
176 enum dma_data_direction dir, struct dma_attrs *attrs)
179 linux_dma_unmap(dev, dma_addr, size);
182 static inline dma_addr_t
183 dma_map_page_attrs(struct device *dev, struct page *page, size_t offset,
184 size_t size, enum dma_data_direction dir, unsigned long attrs)
187 return (linux_dma_map_phys(dev, VM_PAGE_TO_PHYS(page) + offset, size));
191 dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl, int nents,
192 enum dma_data_direction dir, struct dma_attrs *attrs)
195 return (linux_dma_map_sg_attrs(dev, sgl, nents, dir, attrs));
199 dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg, int nents,
200 enum dma_data_direction dir, struct dma_attrs *attrs)
203 linux_dma_unmap_sg_attrs(dev, sg, nents, dir, attrs);
206 static inline dma_addr_t
207 dma_map_page(struct device *dev, struct page *page,
208 unsigned long offset, size_t size, enum dma_data_direction direction)
211 return (linux_dma_map_phys(dev, VM_PAGE_TO_PHYS(page) + offset, size));
215 dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
216 enum dma_data_direction direction)
219 linux_dma_unmap(dev, dma_address, size);
223 dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
224 enum dma_data_direction direction)
229 dma_sync_single(struct device *dev, dma_addr_t addr, size_t size,
230 enum dma_data_direction dir)
232 dma_sync_single_for_cpu(dev, addr, size, dir);
236 dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
237 size_t size, enum dma_data_direction direction)
242 dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
243 enum dma_data_direction direction)
248 dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
249 enum dma_data_direction direction)
254 dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
255 unsigned long offset, size_t size, int direction)
260 dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
261 unsigned long offset, size_t size, int direction)
266 dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
269 return (dma_addr == 0);
272 static inline unsigned int dma_set_max_seg_size(struct device *dev,
279 #define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL)
280 #define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL)
281 #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL)
282 #define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL)
284 #define DEFINE_DMA_UNMAP_ADDR(name) dma_addr_t name
285 #define DEFINE_DMA_UNMAP_LEN(name) __u32 name
286 #define dma_unmap_addr(p, name) ((p)->name)
287 #define dma_unmap_addr_set(p, name, v) (((p)->name) = (v))
288 #define dma_unmap_len(p, name) ((p)->name)
289 #define dma_unmap_len_set(p, name, v) (((p)->name) = (v))
291 extern int uma_align_cache;
292 #define dma_get_cache_alignment() uma_align_cache
294 #endif /* _LINUX_DMA_MAPPING_H_ */