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130 lines
3.5 KiB
C
130 lines
3.5 KiB
C
/*-
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* Copyright (c) 2010 Isilon Systems, Inc.
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* Copyright (c) 2010 iX Systems, Inc.
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* Copyright (c) 2010 Panasas, Inc.
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* Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _LINUXKPI_LINUX_IO_MAPPING_H_
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#define _LINUXKPI_LINUX_IO_MAPPING_H_
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#include <sys/types.h>
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#include <machine/vm.h>
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#include <linux/types.h>
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#include <linux/io.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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struct io_mapping {
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unsigned long base;
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unsigned long size;
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void *mem;
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vm_memattr_t attr;
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};
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struct io_mapping *io_mapping_create_wc(resource_size_t base, unsigned long size);
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static inline struct io_mapping *
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io_mapping_init_wc(struct io_mapping *mapping, resource_size_t base,
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unsigned long size)
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{
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mapping->base = base;
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mapping->size = size;
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#ifdef VM_MEMATTR_WRITE_COMBINING
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mapping->mem = ioremap_wc(base, size);
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mapping->attr = VM_MEMATTR_WRITE_COMBINING;
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#else
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mapping->mem = ioremap_nocache(base, size);
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mapping->attr = VM_MEMATTR_UNCACHEABLE;
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#endif
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return (mapping);
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}
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static inline void
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io_mapping_fini(struct io_mapping *mapping)
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{
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iounmap(mapping->mem);
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}
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static inline void
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io_mapping_free(struct io_mapping *mapping)
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{
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io_mapping_fini(mapping->mem);
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kfree(mapping);
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}
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static inline void *
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io_mapping_map_atomic_wc(struct io_mapping *mapping, unsigned long offset)
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{
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return ((char *)mapping->mem + offset);
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}
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static inline void
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io_mapping_unmap_atomic(void *vaddr)
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{
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}
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static inline void *
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io_mapping_map_local_wc(struct io_mapping *mapping, unsigned long offset)
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{
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return (io_mapping_map_atomic_wc(mapping, offset));
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}
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static inline void
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io_mapping_unmap_local(void *vaddr __unused)
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{
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}
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static inline void *
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io_mapping_map_wc(struct io_mapping *mapping, unsigned long offset,
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unsigned long size)
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{
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return ((char *)mapping->mem + offset);
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}
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int lkpi_io_mapping_map_user(struct io_mapping *iomap,
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struct vm_area_struct *vma, unsigned long addr, unsigned long pfn,
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unsigned long size);
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static inline int
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io_mapping_map_user(struct io_mapping *iomap, struct vm_area_struct *vma,
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unsigned long addr, unsigned long pfn, unsigned long size)
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{
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return (lkpi_io_mapping_map_user(iomap, vma, addr, pfn, size));
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}
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static inline void
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io_mapping_unmap(void *vaddr)
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{
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}
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#endif /* _LINUXKPI_LINUX_IO_MAPPING_H_ */
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