/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * NXP Wireless LAN device driver: utility functions
 *
 * Copyright 2011-2020 NXP
 */

#ifndef _MWIFIEX_UTIL_H_
#define _MWIFIEX_UTIL_H_

struct mwifiex_private;

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;
        };
};

/* size/addr for mwifiex_debug_info */
#define item_size(n)            (sizeof_field(struct mwifiex_debug_info, n))
#define item_addr(n)            (offsetof(struct mwifiex_debug_info, n))

/* size/addr for struct mwifiex_adapter */
#define adapter_item_size(n)    (sizeof_field(struct mwifiex_adapter, n))
#define adapter_item_addr(n)    (offsetof(struct mwifiex_adapter, n))

struct mwifiex_debug_data {
        char name[32];          /* variable/array name */
        u32 size;               /* size of the variable/array */
        size_t addr;            /* address of the variable/array */
        int num;                /* number of variables in an array */
};

static inline struct mwifiex_rxinfo *MWIFIEX_SKB_RXCB(struct sk_buff *skb)
{
        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)
{
        struct mwifiex_cb *cb = (struct mwifiex_cb *)skb->cb;

        return &cb->tx_info;
}

static inline void mwifiex_store_mapping(struct sk_buff *skb,
                                         struct mwifiex_dma_mapping *mapping)
{
        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;
}

int mwifiex_debug_info_to_buffer(struct mwifiex_private *priv, char *buf,
                                 struct mwifiex_debug_info *info);

static inline void le16_unaligned_add_cpu(__le16 *var, u16 val)
{
        put_unaligned_le16(get_unaligned_le16(var) + val, var);
}

#endif /* !_MWIFIEX_UTIL_H_ */