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/*-
* Copyright (c) 2010 Isilon Systems, Inc.
* Copyright (c) 2010 iX Systems, Inc.
* Copyright (c) 2010 Panasas, Inc.
* Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _LINUX_DMAPOOL_H_
#define _LINUX_DMAPOOL_H_
#include <linux/types.h>
#include <linux/io.h>
#include <linux/scatterlist.h>
#include <linux/device.h>
#include <linux/slab.h>
struct dma_pool {
uma_zone_t pool_zone;
};
static inline struct dma_pool *
dma_pool_create(char *name, struct device *dev, size_t size,
size_t align, size_t boundary)
{
struct dma_pool *pool;
pool = kmalloc(sizeof(*pool), GFP_KERNEL);
align--;
/*
* XXX Eventually this could use a seperate allocf to honor boundary
* and physical address requirements of the device.
*/
pool->pool_zone = uma_zcreate(name, size, NULL, NULL, NULL, NULL,
align, UMA_ZONE_OFFPAGE|UMA_ZONE_HASH);
return (pool);
}
static inline void
dma_pool_destroy(struct dma_pool *pool)
{
uma_zdestroy(pool->pool_zone);
kfree(pool);
}
static inline void *
dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, dma_addr_t *handle)
{
void *vaddr;
vaddr = uma_zalloc(pool->pool_zone, mem_flags);
if (vaddr)
*handle = vtophys(vaddr);
return (vaddr);
}
static inline void
dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t addr)
{
uma_zfree(pool->pool_zone, vaddr);
}
#endif /* _LINUX_DMAPOOL_H_ */
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