C++ (Cpp) __adf_nbuf_map_single示例

示例#1

文件： adf_nbuf.c 项目： Tkkg1994/qcacld-2.0

/**
 * @brief get the dma map of the nbuf
 *
 * @param osdev
 * @param bmap
 * @param skb
 * @param dir
 *
 * @return a_status_t
 */
a_status_t
__adf_nbuf_map(
    adf_os_device_t osdev,
    struct sk_buff *skb,
    adf_os_dma_dir_t dir)
{
#ifdef ADF_OS_DEBUG
    struct skb_shared_info  *sh = skb_shinfo(skb);
#endif
    adf_os_assert(
        (dir == ADF_OS_DMA_TO_DEVICE) || (dir == ADF_OS_DMA_FROM_DEVICE));

    /*
     * Assume there's only a single fragment.
     * To support multiple fragments, it would be necessary to change
     * adf_nbuf_t to be a separate object that stores meta-info
     * (including the bus address for each fragment) and a pointer
     * to the underlying sk_buff.
     */
    adf_os_assert(sh->nr_frags == 0);

    return __adf_nbuf_map_single(osdev, skb, dir);

    return A_STATUS_OK;
}

示例#2

文件： adf_nbuf.c 项目： KHATEEBNSIT/AP

/**
 * @brief get the dma map of the nbuf
 *
 * @param osdev
 * @param bmap
 * @param skb
 * @param dir
 *
 * @return a_status_t
 */
a_status_t
__adf_nbuf_map(
    adf_os_device_t osdev,
    struct sk_buff *skb,
    adf_os_dma_dir_t dir)
{
#ifdef ADF_OS_DEBUG
    struct skb_shared_info  *sh = skb_shinfo(skb);
#endif
    adf_os_assert(
        (dir == ADF_OS_DMA_TO_DEVICE) || (dir == ADF_OS_DMA_FROM_DEVICE));

    /*
     * Assume there's only a single fragment.
     * To support multiple fragments, it would be necessary to change
     * adf_nbuf_t to be a separate object that stores meta-info
     * (including the bus address for each fragment) and a pointer
     * to the underlying sk_buff.
     */
    adf_os_assert(sh->nr_frags == 0);

    return __adf_nbuf_map_single(osdev, skb, dir);

#if 0
    {
        int i;
        adf_os_assert(sh->nr_frags <= __ADF_OS_MAX_SCATTER);

        for (i = 1; i <= sh->nr_frags; i++) {
            skb_frag_t *f           = &sh->frags[i-1]
                                      NBUF_MAPPED_FRAG_PADDR_LO(buf, i) = dma_map_page(
                                                  osdev->dev, f->page, f->page_offset, f->size, dir);
        }
        adf_os_assert(sh->frag_list == NULL);
    }
#endif
    return A_STATUS_OK;
}