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.
29 #ifndef _LINUX_DMAPOOL_H_
30 #define _LINUX_DMAPOOL_H_
32 #include <linux/types.h>
34 #include <linux/scatterlist.h>
35 #include <linux/device.h>
36 #include <linux/slab.h>
42 static inline struct dma_pool *
43 dma_pool_create(char *name, struct device *dev, size_t size,
44 size_t align, size_t boundary)
46 struct dma_pool *pool;
48 pool = kmalloc(sizeof(*pool), GFP_KERNEL);
51 * XXX Eventually this could use a seperate allocf to honor boundary
52 * and physical address requirements of the device.
54 pool->pool_zone = uma_zcreate(name, size, NULL, NULL, NULL, NULL,
55 align, UMA_ZONE_OFFPAGE|UMA_ZONE_HASH);
61 dma_pool_destroy(struct dma_pool *pool)
63 uma_zdestroy(pool->pool_zone);
68 dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, dma_addr_t *handle)
72 vaddr = uma_zalloc(pool->pool_zone, mem_flags);
74 *handle = vtophys(vaddr);
79 dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t addr)
81 uma_zfree(pool->pool_zone, vaddr);
85 #endif /* _LINUX_DMAPOOL_H_ */