FreeBSD/Linux Kernel Cross Reference
sys/compat/linuxkpi/common/include/linux/io-mapping.h

     /*-
      * 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 _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_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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