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_DMAPOOL_H_
32 #define _LINUX_DMAPOOL_H_
34 #include <linux/types.h>
36 #include <linux/scatterlist.h>
37 #include <linux/device.h>
38 #include <linux/slab.h>
44 static inline struct dma_pool *
45 dma_pool_create(char *name, struct device *dev, size_t size,
46 size_t align, size_t boundary)
48 struct dma_pool *pool;
50 pool = kmalloc(sizeof(*pool), GFP_KERNEL);
53 * XXX Eventually this could use a separate allocf to honor boundary
54 * and physical address requirements of the device.
56 pool->pool_zone = uma_zcreate(name, size, NULL, NULL, NULL, NULL,
57 align, UMA_ZONE_OFFPAGE|UMA_ZONE_HASH);
63 dma_pool_destroy(struct dma_pool *pool)
65 uma_zdestroy(pool->pool_zone);
70 dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, dma_addr_t *handle)
74 vaddr = uma_zalloc(pool->pool_zone, mem_flags);
76 *handle = vtophys(vaddr);
81 dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t addr)
83 uma_zfree(pool->pool_zone, vaddr);
87 #endif /* _LINUX_DMAPOOL_H_ */