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_dma_mapping {
24 dma_addr_t addr;
25 size_t len;
26 };
27
28 struct mwifiex_cb {
29 struct mwifiex_dma_mapping dma_mapping;
30 union {
31 struct mwifiex_rxinfo rx_info;
32 struct mwifiex_txinfo tx_info;
33 };
34 };
35
MWIFIEX_SKB_RXCB(struct sk_buff * skb)36 static inline struct mwifiex_rxinfo *MWIFIEX_SKB_RXCB(struct sk_buff *skb)
37 {
38 struct mwifiex_cb *cb = (struct mwifiex_cb *)skb->cb;
39
40 BUILD_BUG_ON(sizeof(struct mwifiex_cb) > sizeof(skb->cb));
41 return &cb->rx_info;
42 }
43
MWIFIEX_SKB_TXCB(struct sk_buff * skb)44 static inline struct mwifiex_txinfo *MWIFIEX_SKB_TXCB(struct sk_buff *skb)
45 {
46 struct mwifiex_cb *cb = (struct mwifiex_cb *)skb->cb;
47
48 return &cb->tx_info;
49 }
50
mwifiex_store_mapping(struct sk_buff * skb,struct mwifiex_dma_mapping * mapping)51 static inline void mwifiex_store_mapping(struct sk_buff *skb,
52 struct mwifiex_dma_mapping *mapping)
53 {
54 struct mwifiex_cb *cb = (struct mwifiex_cb *)skb->cb;
55
56 memcpy(&cb->dma_mapping, mapping, sizeof(*mapping));
57 }
58
mwifiex_get_mapping(struct sk_buff * skb,struct mwifiex_dma_mapping * mapping)59 static inline void mwifiex_get_mapping(struct sk_buff *skb,
60 struct mwifiex_dma_mapping *mapping)
61 {
62 struct mwifiex_cb *cb = (struct mwifiex_cb *)skb->cb;
63
64 memcpy(mapping, &cb->dma_mapping, sizeof(*mapping));
65 }
66
MWIFIEX_SKB_DMA_ADDR(struct sk_buff * skb)67 static inline dma_addr_t MWIFIEX_SKB_DMA_ADDR(struct sk_buff *skb)
68 {
69 struct mwifiex_dma_mapping mapping;
70
71 mwifiex_get_mapping(skb, &mapping);
72
73 return mapping.addr;
74 }
75
76 #endif /* !_MWIFIEX_UTIL_H_ */
77