LXR linux/drivers/net/wireless/marvell/mwifiex/util.h

   1/*
   2 * Marvell Wireless LAN device driver: utility functions
   3 *
   4 * Copyright (C) 2011-2014, Marvell International Ltd.
   5 *
   6 * This software file (the "File") is distributed by Marvell International
   7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8 * (the "License").  You may use, redistribute and/or modify this File in
   9 * accordance with the terms and conditions of the License, a copy of which
  10 * is available by writing to the Free Software Foundation, Inc.,
  11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13 *
  14 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16 * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17 * this warranty disclaimer.
  18 */
  19
  20#ifndef _MWIFIEX_UTIL_H_
  21#define _MWIFIEX_UTIL_H_
  22
  23struct mwifiex_private;
  24
  25struct mwifiex_dma_mapping {
  26        dma_addr_t addr;
  27        size_t len;
  28};
  29
  30struct mwifiex_cb {
  31        struct mwifiex_dma_mapping dma_mapping;
  32        union {
  33                struct mwifiex_rxinfo rx_info;
  34                struct mwifiex_txinfo tx_info;
  35        };
  36};
  37
  38/* size/addr for mwifiex_debug_info */
  39#define item_size(n)            (FIELD_SIZEOF(struct mwifiex_debug_info, n))
  40#define item_addr(n)            (offsetof(struct mwifiex_debug_info, n))
  41
  42/* size/addr for struct mwifiex_adapter */
  43#define adapter_item_size(n)    (FIELD_SIZEOF(struct mwifiex_adapter, n))
  44#define adapter_item_addr(n)    (offsetof(struct mwifiex_adapter, n))
  45
  46struct mwifiex_debug_data {
  47        char name[32];          /* variable/array name */
  48        u32 size;               /* size of the variable/array */
  49        size_t addr;            /* address of the variable/array */
  50        int num;                /* number of variables in an array */
  51};
  52
  53static inline struct mwifiex_rxinfo *MWIFIEX_SKB_RXCB(struct sk_buff *skb)
  54{
  55        struct mwifiex_cb *cb = (struct mwifiex_cb *)skb->cb;
  56
  57        BUILD_BUG_ON(sizeof(struct mwifiex_cb) > sizeof(skb->cb));
  58        return &cb->rx_info;
  59}
  60
  61static inline struct mwifiex_txinfo *MWIFIEX_SKB_TXCB(struct sk_buff *skb)
  62{
  63        struct mwifiex_cb *cb = (struct mwifiex_cb *)skb->cb;
  64
  65        return &cb->tx_info;
  66}
  67
  68static inline void mwifiex_store_mapping(struct sk_buff *skb,
  69                                         struct mwifiex_dma_mapping *mapping)
  70{
  71        struct mwifiex_cb *cb = (struct mwifiex_cb *)skb->cb;
  72
  73        memcpy(&cb->dma_mapping, mapping, sizeof(*mapping));
  74}
  75
  76static inline void mwifiex_get_mapping(struct sk_buff *skb,
  77                                       struct mwifiex_dma_mapping *mapping)
  78{
  79        struct mwifiex_cb *cb = (struct mwifiex_cb *)skb->cb;
  80
  81        memcpy(mapping, &cb->dma_mapping, sizeof(*mapping));
  82}
  83
  84static inline dma_addr_t MWIFIEX_SKB_DMA_ADDR(struct sk_buff *skb)
  85{
  86        struct mwifiex_dma_mapping mapping;
  87
  88        mwifiex_get_mapping(skb, &mapping);
  89
  90        return mapping.addr;
  91}
  92
  93int mwifiex_debug_info_to_buffer(struct mwifiex_private *priv, char *buf,
  94                                 struct mwifiex_debug_info *info);
  95
  96#endif /* !_MWIFIEX_UTIL_H_ */
  97