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
  23 struct mwifiex_private;
  24
  25 struct mwifiex_dma_mapping {
  26         dma_addr_t addr;
  27         size_t len;
  28 };
  29
  30 struct 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
  46 struct 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
  53 static 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
  61 static 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
  68 static 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
  76 static 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
  84 static 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
  93 int mwifiex_debug_info_to_buffer(struct mwifiex_private *priv, char *buf,
  94                                  struct mwifiex_debug_info *info);
  95
  96 #endif /* !_MWIFIEX_UTIL_H_ */