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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 _LINUXKPI_LINUX_IO_MAPPING_H_
#define _LINUXKPI_LINUX_IO_MAPPING_H_
#include <sys/types.h>
#include <machine/vm.h>
#include <linux/types.h>
#include <linux/io.h>
#include <linux/mm.h>
#include <linux/slab.h>
struct io_mapping {
unsigned long base;
unsigned long size;
void *mem;
vm_memattr_t attr;
};
struct io_mapping *io_mapping_create_wc(resource_size_t base, unsigned long size);
static inline struct io_mapping *
io_mapping_init_wc(struct io_mapping *mapping, resource_size_t base,
unsigned long size)
{
mapping->base = base;
mapping->size = size;
#ifdef VM_MEMATTR_WRITE_COMBINING
mapping->mem = ioremap_wc(base, size);
mapping->attr = VM_MEMATTR_WRITE_COMBINING;
#else
mapping->mem = ioremap_nocache(base, size);
mapping->attr = VM_MEMATTR_UNCACHEABLE;
#endif
return (mapping);
}
static inline void
io_mapping_fini(struct io_mapping *mapping)
{
iounmap(mapping->mem);
}
static inline void
io_mapping_free(struct io_mapping *mapping)
{
io_mapping_fini(mapping->mem);
kfree(mapping);
}
static inline void *
io_mapping_map_atomic_wc(struct io_mapping *mapping, unsigned long offset)
{
return ((char *)mapping->mem + offset);
}
static inline void
io_mapping_unmap_atomic(void *vaddr)
{
}
static inline void *
io_mapping_map_local_wc(struct io_mapping *mapping, unsigned long offset)
{
return (io_mapping_map_atomic_wc(mapping, offset));
}
static inline void
io_mapping_unmap_local(void *vaddr __unused)
{
}
static inline void *
io_mapping_map_wc(struct io_mapping *mapping, unsigned long offset,
unsigned long size)
{
return ((char *)mapping->mem + offset);
}
int lkpi_io_mapping_map_user(struct io_mapping *iomap,
struct vm_area_struct *vma, unsigned long addr, unsigned long pfn,
unsigned long size);
static inline int
io_mapping_map_user(struct io_mapping *iomap, struct vm_area_struct *vma,
unsigned long addr, unsigned long pfn, unsigned long size)
{
return (lkpi_io_mapping_map_user(iomap, vma, addr, pfn, size));
}
static inline void
io_mapping_unmap(void *vaddr)
{
}
#endif /* _LINUXKPI_LINUX_IO_MAPPING_H_ */
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