diff options
Diffstat (limited to 'drivers/net/wireless/mwifiex/util.h')
| -rw-r--r-- | drivers/net/wireless/mwifiex/util.h | 47 |
1 files changed, 43 insertions, 4 deletions
diff --git a/drivers/net/wireless/mwifiex/util.h b/drivers/net/wireless/mwifiex/util.h index cb2d0582bd3..caadb3737b9 100644 --- a/drivers/net/wireless/mwifiex/util.h +++ b/drivers/net/wireless/mwifiex/util.h @@ -20,18 +20,57 @@ #ifndef _MWIFIEX_UTIL_H_ #define _MWIFIEX_UTIL_H_ +struct mwifiex_dma_mapping { + dma_addr_t addr; + size_t len; +}; + +struct mwifiex_cb { + struct mwifiex_dma_mapping dma_mapping; + union { + struct mwifiex_rxinfo rx_info; + struct mwifiex_txinfo tx_info; + }; +}; + static inline struct mwifiex_rxinfo *MWIFIEX_SKB_RXCB(struct sk_buff *skb) { - return (struct mwifiex_rxinfo *)(skb->cb + sizeof(dma_addr_t)); + struct mwifiex_cb *cb = (struct mwifiex_cb *)skb->cb; + + BUILD_BUG_ON(sizeof(struct mwifiex_cb) > sizeof(skb->cb)); + return &cb->rx_info; } static inline struct mwifiex_txinfo *MWIFIEX_SKB_TXCB(struct sk_buff *skb) { - return (struct mwifiex_txinfo *)(skb->cb + sizeof(dma_addr_t)); + struct mwifiex_cb *cb = (struct mwifiex_cb *)skb->cb; + + return &cb->tx_info; } -static inline void MWIFIEX_SKB_PACB(struct sk_buff *skb, dma_addr_t *buf_pa) +static inline void mwifiex_store_mapping(struct sk_buff *skb, + struct mwifiex_dma_mapping *mapping) { - memcpy(buf_pa, skb->cb, sizeof(dma_addr_t)); + struct mwifiex_cb *cb = (struct mwifiex_cb *)skb->cb; + + memcpy(&cb->dma_mapping, mapping, sizeof(*mapping)); } + +static inline void mwifiex_get_mapping(struct sk_buff *skb, + struct mwifiex_dma_mapping *mapping) +{ + struct mwifiex_cb *cb = (struct mwifiex_cb *)skb->cb; + + memcpy(mapping, &cb->dma_mapping, sizeof(*mapping)); +} + +static inline dma_addr_t MWIFIEX_SKB_DMA_ADDR(struct sk_buff *skb) +{ + struct mwifiex_dma_mapping mapping; + + mwifiex_get_mapping(skb, &mapping); + + return mapping.addr; +} + #endif /* !_MWIFIEX_UTIL_H_ */ |