FreeBSD/Linux Kernel Cross Reference
sys/dev/mlx4/mlx4_ib/mlx4_ib_wc.c

     /*
      * Copyright (c) 2006-2007 Mellanox Technologies. All rights reserved.
      *
      * This software is available to you under a choice of one of two
      * licenses.  You may choose to be licensed under the terms of the GNU
      * General Public License (GPL) Version 2, available from the file
      * COPYING in the main directory of this source tree, or the
      * OpenIB.org BSD license below:
      *
     *     Redistribution and use in source and binary forms, with or
     *     without modification, are permitted provided that the following
     *     conditions are met:
     *
     *      - Redistributions of source code must retain the above
     *        copyright notice, this list of conditions and the following
     *        disclaimer.
     *
     *      - 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.
     *
     * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
     * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
     * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     * SOFTWARE.
     */
    
    #include <linux/pci.h>
    #include "wc.h"
    
    #if defined(__i386__) || defined(__x86_64__)
    
    pgprot_t pgprot_wc(pgprot_t _prot)
    {
            return pgprot_writecombine(_prot);
    }
    
    int mlx4_wc_enabled(void)
    {
            return 1;
    }
    
    #elif defined(CONFIG_PPC64)
    
    pgprot_t pgprot_wc(pgprot_t _prot)
    {
            return __pgprot((pgprot_val(_prot) | _PAGE_NO_CACHE) &
                                         ~(pgprot_t)_PAGE_GUARDED);
    }
    
    int mlx4_wc_enabled(void)
    {
            return 1;
    }
    
    #else   /* !(defined(__i386__) || defined(__x86_64__)) */
    
    pgprot_t pgprot_wc(pgprot_t _prot)
    {
            return pgprot_noncached(_prot);
    }
    
    int mlx4_wc_enabled(void)
    {
            return 0;
    }
    
    #endif

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