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sys/compat/linuxkpi/3.15/include/linux/dmapool.h
- This file was added.
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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 separate 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_ */ |