diff options
Diffstat (limited to 'sys/compat/linuxkpi/common/include/linux/dmapool.h')
-rw-r--r-- | sys/compat/linuxkpi/common/include/linux/dmapool.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/dmapool.h b/sys/compat/linuxkpi/common/include/linux/dmapool.h new file mode 100644 index 0000000..3ea2d5b --- /dev/null +++ b/sys/compat/linuxkpi/common/include/linux/dmapool.h @@ -0,0 +1,87 @@ +/*- + * 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. + * + * $FreeBSD$ + */ +#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_ */ |