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_ */ 97