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