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
 96static 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_ */