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 static inline void le16_unaligned_add_cpu(__le16 *var, u16 val)
97 {
98 	put_unaligned_le16(get_unaligned_le16(var) + val, var);
99 }
100 
101 #endif /* !_MWIFIEX_UTIL_H_ */
102