2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice unmodified, this list of conditions, and the following
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #ifndef _LINUX_DMA_MAPPING_H_
29 #define _LINUX_DMA_MAPPING_H_
31 #include <linux/types.h>
32 #include <linux/device.h>
33 #include <linux/err.h>
34 #include <linux/dma-attrs.h>
35 #include <linux/scatterlist.h>
37 #include <linux/page.h>
39 #include <sys/systm.h>
40 #include <sys/malloc.h>
43 #include <vm/vm_page.h>
46 #include <machine/bus.h>
47 #include <machine/pmap.h>
49 enum dma_data_direction {
50 DMA_BIDIRECTIONAL = 0,
57 void* (*alloc_coherent)(struct device *dev, size_t size,
58 dma_addr_t *dma_handle, gfp_t gfp);
59 void (*free_coherent)(struct device *dev, size_t size,
60 void *vaddr, dma_addr_t dma_handle);
61 dma_addr_t (*map_page)(struct device *dev, struct page *page,
62 unsigned long offset, size_t size, enum dma_data_direction dir,
63 struct dma_attrs *attrs);
64 void (*unmap_page)(struct device *dev, dma_addr_t dma_handle,
65 size_t size, enum dma_data_direction dir, struct dma_attrs *attrs);
66 int (*map_sg)(struct device *dev, struct scatterlist *sg,
67 int nents, enum dma_data_direction dir, struct dma_attrs *attrs);
68 void (*unmap_sg)(struct device *dev, struct scatterlist *sg, int nents,
69 enum dma_data_direction dir, struct dma_attrs *attrs);
70 void (*sync_single_for_cpu)(struct device *dev, dma_addr_t dma_handle,
71 size_t size, enum dma_data_direction dir);
72 void (*sync_single_for_device)(struct device *dev,
73 dma_addr_t dma_handle, size_t size, enum dma_data_direction dir);
74 void (*sync_single_range_for_cpu)(struct device *dev,
75 dma_addr_t dma_handle, unsigned long offset, size_t size,
76 enum dma_data_direction dir);
77 void (*sync_single_range_for_device)(struct device *dev,
78 dma_addr_t dma_handle, unsigned long offset, size_t size,
79 enum dma_data_direction dir);
80 void (*sync_sg_for_cpu)(struct device *dev, struct scatterlist *sg,
81 int nents, enum dma_data_direction dir);
82 void (*sync_sg_for_device)(struct device *dev, struct scatterlist *sg,
83 int nents, enum dma_data_direction dir);
84 int (*mapping_error)(struct device *dev, dma_addr_t dma_addr);
85 int (*dma_supported)(struct device *dev, u64 mask);
89 #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL << (n)) - 1))
92 dma_supported(struct device *dev, u64 mask)
95 /* XXX busdma takes care of this elsewhere. */
100 dma_set_mask(struct device *dev, u64 dma_mask)
103 if (!dev->dma_mask || !dma_supported(dev, dma_mask))
106 *dev->dma_mask = dma_mask;
111 dma_set_coherent_mask(struct device *dev, u64 mask)
114 if (!dma_supported(dev, mask))
116 /* XXX Currently we don't support a seperate coherent mask. */
121 dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
129 high = *dev->dma_mask;
131 high = BUS_SPACE_MAXADDR_32BIT;
132 align = PAGE_SIZE << get_order(size);
133 mem = (void *)kmem_alloc_contig(kmem_map, size, flag, 0, high, align,
134 0, VM_MEMATTR_DEFAULT);
136 *dma_handle = vtophys(mem);
143 dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
144 dma_addr_t dma_handle)
147 kmem_free(kmem_map, (vm_offset_t)cpu_addr, size);
150 /* XXX This only works with no iommu. */
151 static inline dma_addr_t
152 dma_map_single_attrs(struct device *dev, void *ptr, size_t size,
153 enum dma_data_direction dir, struct dma_attrs *attrs)
160 dma_unmap_single_attrs(struct device *dev, dma_addr_t addr, size_t size,
161 enum dma_data_direction dir, struct dma_attrs *attrs)
166 dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl, int nents,
167 enum dma_data_direction dir, struct dma_attrs *attrs)
169 struct scatterlist *sg;
172 for_each_sg(sgl, sg, nents, i)
173 sg_dma_address(sg) = sg_phys(sg);
179 dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg, int nents,
180 enum dma_data_direction dir, struct dma_attrs *attrs)
184 static inline dma_addr_t
185 dma_map_page(struct device *dev, struct page *page,
186 unsigned long offset, size_t size, enum dma_data_direction direction)
189 return VM_PAGE_TO_PHYS(page) + offset;
193 dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
194 enum dma_data_direction direction)
199 dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
200 enum dma_data_direction direction)
205 dma_sync_single(struct device *dev, dma_addr_t addr, size_t size,
206 enum dma_data_direction dir)
208 dma_sync_single_for_cpu(dev, addr, size, dir);
212 dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
213 size_t size, enum dma_data_direction direction)
218 dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
219 enum dma_data_direction direction)
224 dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
225 enum dma_data_direction direction)
230 dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
231 unsigned long offset, size_t size, int direction)
236 dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
237 unsigned long offset, size_t size, int direction)
242 dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
248 #define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL)
249 #define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL)
250 #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL)
251 #define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL)
253 #define DEFINE_DMA_UNMAP_ADDR(name) dma_addr_t name
254 #define DEFINE_DMA_UNMAP_LEN(name) __u32 name
255 #define dma_unmap_addr(p, name) ((p)->name)
256 #define dma_unmap_addr_set(p, name, v) (((p)->name) = (v))
257 #define dma_unmap_len(p, name) ((p)->name)
258 #define dma_unmap_len_set(p, name, v) (((p)->name) = (v))
260 extern int uma_align_cache;
261 #define dma_get_cache_alignment() uma_align_cache
263 #endif /* _LINUX_DMA_MAPPING_H_ */