FreeBSD/Linux Kernel Cross Reference
sys/dev/qlnx/qlnxe/ecore_utils.h

     /*
      * Copyright (c) 2017-2018 Cavium, Inc. 
      * 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, 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 COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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 __ECORE_UTILS_H__
    #define __ECORE_UTILS_H__
    
    /* dma_addr_t manip */
    /* Suppress "right shift count >= width of type" warning when that quantity is
     * 32-bits rquires the >> 16) >> 16)
     */
    #define PTR_LO(x)               ((u32)(((osal_uintptr_t)(x)) & 0xffffffff))
    #define PTR_HI(x)               ((u32)((((osal_uintptr_t)(x)) >> 16) >> 16))
    
    #define DMA_LO(x)               ((u32)(((dma_addr_t)(x)) & 0xffffffff))
    #define DMA_HI(x)               ((u32)(((dma_addr_t)(x)) >> 32))
    
    #define DMA_LO_LE(x)            OSAL_CPU_TO_LE32(DMA_LO(x))
    #define DMA_HI_LE(x)            OSAL_CPU_TO_LE32(DMA_HI(x))
    
    /* It's assumed that whoever includes this has previously included an hsi
     * file defining the regpair.
     */
    #define DMA_REGPAIR_LE(x, val)  (x).hi = DMA_HI_LE((val)); \
                                    (x).lo = DMA_LO_LE((val))
    
    #define HILO_GEN(hi, lo, type)  ((((type)(hi)) << 32) + (lo))
    #define HILO_DMA(hi, lo)        HILO_GEN(hi, lo, dma_addr_t)
    #define HILO_64(hi, lo)         HILO_GEN(hi, lo, u64)
    #define HILO_DMA_REGPAIR(regpair)       (HILO_DMA(regpair.hi, regpair.lo))
    #define HILO_64_REGPAIR(regpair)        (HILO_64(regpair.hi, regpair.lo))
    
    #ifndef USHRT_MAX
    #define USHRT_MAX       ((u16)(~0U))
    #endif
    
    #endif

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