| // SPDX-License-Identifier: GPL-2.0 |
| /****************************************************************************** |
| * |
| * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved. |
| * |
| ******************************************************************************/ |
| #include <drv_types.h> |
| #include <rtw_debug.h> |
| |
| /* |
| * Translate the OS dependent @param error_code to OS independent RTW_STATUS_CODE |
| * @return: one of RTW_STATUS_CODE |
| */ |
| inline int RTW_STATUS_CODE(int error_code) |
| { |
| if (error_code >= 0) |
| return _SUCCESS; |
| return _FAIL; |
| } |
| |
| void *_rtw_malloc(u32 sz) |
| { |
| return kmalloc(sz, in_interrupt() ? GFP_ATOMIC : GFP_KERNEL); |
| } |
| |
| void *_rtw_zmalloc(u32 sz) |
| { |
| void *pbuf = _rtw_malloc(sz); |
| |
| if (pbuf) |
| memset(pbuf, 0, sz); |
| |
| return pbuf; |
| } |
| |
| inline struct sk_buff *_rtw_skb_alloc(u32 sz) |
| { |
| return __dev_alloc_skb(sz, in_interrupt() ? GFP_ATOMIC : GFP_KERNEL); |
| } |
| |
| inline struct sk_buff *_rtw_skb_copy(const struct sk_buff *skb) |
| { |
| return skb_copy(skb, in_interrupt() ? GFP_ATOMIC : GFP_KERNEL); |
| } |
| |
| inline int _rtw_netif_rx(struct net_device *ndev, struct sk_buff *skb) |
| { |
| skb->dev = ndev; |
| return netif_rx(skb); |
| } |
| |
| struct net_device *rtw_alloc_etherdev_with_old_priv(int sizeof_priv, void *old_priv) |
| { |
| struct net_device *pnetdev; |
| struct rtw_netdev_priv_indicator *pnpi; |
| |
| pnetdev = alloc_etherdev_mq(sizeof(struct rtw_netdev_priv_indicator), 4); |
| if (!pnetdev) |
| goto RETURN; |
| |
| pnpi = netdev_priv(pnetdev); |
| pnpi->priv = old_priv; |
| pnpi->sizeof_priv = sizeof_priv; |
| |
| RETURN: |
| return pnetdev; |
| } |
| |
| struct net_device *rtw_alloc_etherdev(int sizeof_priv) |
| { |
| struct net_device *pnetdev; |
| struct rtw_netdev_priv_indicator *pnpi; |
| |
| pnetdev = alloc_etherdev_mq(sizeof(struct rtw_netdev_priv_indicator), 4); |
| if (!pnetdev) |
| goto RETURN; |
| |
| pnpi = netdev_priv(pnetdev); |
| |
| pnpi->priv = vzalloc(sizeof_priv); |
| if (!pnpi->priv) { |
| free_netdev(pnetdev); |
| pnetdev = NULL; |
| goto RETURN; |
| } |
| |
| pnpi->sizeof_priv = sizeof_priv; |
| RETURN: |
| return pnetdev; |
| } |
| |
| void rtw_free_netdev(struct net_device *netdev) |
| { |
| struct rtw_netdev_priv_indicator *pnpi; |
| |
| if (!netdev) |
| goto RETURN; |
| |
| pnpi = netdev_priv(netdev); |
| |
| if (!pnpi->priv) |
| goto RETURN; |
| |
| vfree(pnpi->priv); |
| free_netdev(netdev); |
| |
| RETURN: |
| return; |
| } |
| |
| int rtw_change_ifname(struct adapter *padapter, const char *ifname) |
| { |
| struct net_device *pnetdev; |
| struct net_device *cur_pnetdev; |
| struct rereg_nd_name_data *rereg_priv; |
| int ret; |
| |
| if (!padapter) |
| goto error; |
| |
| cur_pnetdev = padapter->pnetdev; |
| rereg_priv = &padapter->rereg_nd_name_priv; |
| |
| /* free the old_pnetdev */ |
| if (rereg_priv->old_pnetdev) { |
| free_netdev(rereg_priv->old_pnetdev); |
| rereg_priv->old_pnetdev = NULL; |
| } |
| |
| if (!rtnl_is_locked()) |
| unregister_netdev(cur_pnetdev); |
| else |
| unregister_netdevice(cur_pnetdev); |
| |
| rereg_priv->old_pnetdev = cur_pnetdev; |
| |
| pnetdev = rtw_init_netdev(padapter); |
| if (!pnetdev) |
| goto error; |
| |
| SET_NETDEV_DEV(pnetdev, dvobj_to_dev(adapter_to_dvobj(padapter))); |
| |
| rtw_init_netdev_name(pnetdev, ifname); |
| |
| eth_hw_addr_set(pnetdev, padapter->eeprompriv.mac_addr); |
| |
| if (!rtnl_is_locked()) |
| ret = register_netdev(pnetdev); |
| else |
| ret = register_netdevice(pnetdev); |
| |
| if (ret != 0) |
| goto error; |
| |
| return 0; |
| |
| error: |
| return -1; |
| } |
| |
| void rtw_buf_free(u8 **buf, u32 *buf_len) |
| { |
| if (!buf || !buf_len) |
| return; |
| |
| if (*buf) { |
| *buf_len = 0; |
| kfree(*buf); |
| *buf = NULL; |
| } |
| } |
| |
| void rtw_buf_update(u8 **buf, u32 *buf_len, u8 *src, u32 src_len) |
| { |
| u32 ori_len = 0, dup_len = 0; |
| u8 *ori = NULL; |
| u8 *dup = NULL; |
| |
| if (!buf || !buf_len) |
| return; |
| |
| if (!src || !src_len) |
| goto keep_ori; |
| |
| /* duplicate src */ |
| dup = rtw_malloc(src_len); |
| if (dup) { |
| dup_len = src_len; |
| memcpy(dup, src, dup_len); |
| } |
| |
| keep_ori: |
| ori = *buf; |
| ori_len = *buf_len; |
| |
| /* replace buf with dup */ |
| *buf_len = 0; |
| *buf = dup; |
| *buf_len = dup_len; |
| |
| /* free ori */ |
| if (ori && ori_len > 0) |
| kfree(ori); |
| } |
| |
| |
| /** |
| * rtw_cbuf_full - test if cbuf is full |
| * @cbuf: pointer of struct rtw_cbuf |
| * |
| * Returns: true if cbuf is full |
| */ |
| inline bool rtw_cbuf_full(struct rtw_cbuf *cbuf) |
| { |
| return (cbuf->write == cbuf->read - 1) ? true : false; |
| } |
| |
| /** |
| * rtw_cbuf_empty - test if cbuf is empty |
| * @cbuf: pointer of struct rtw_cbuf |
| * |
| * Returns: true if cbuf is empty |
| */ |
| inline bool rtw_cbuf_empty(struct rtw_cbuf *cbuf) |
| { |
| return (cbuf->write == cbuf->read) ? true : false; |
| } |
| |
| /** |
| * rtw_cbuf_push - push a pointer into cbuf |
| * @cbuf: pointer of struct rtw_cbuf |
| * @buf: pointer to push in |
| * |
| * Lock free operation, be careful of the use scheme |
| * Returns: true push success |
| */ |
| bool rtw_cbuf_push(struct rtw_cbuf *cbuf, void *buf) |
| { |
| if (rtw_cbuf_full(cbuf)) |
| return _FAIL; |
| |
| cbuf->bufs[cbuf->write] = buf; |
| cbuf->write = (cbuf->write + 1) % cbuf->size; |
| |
| return _SUCCESS; |
| } |
| |
| /** |
| * rtw_cbuf_pop - pop a pointer from cbuf |
| * @cbuf: pointer of struct rtw_cbuf |
| * |
| * Lock free operation, be careful of the use scheme |
| * Returns: pointer popped out |
| */ |
| void *rtw_cbuf_pop(struct rtw_cbuf *cbuf) |
| { |
| void *buf; |
| if (rtw_cbuf_empty(cbuf)) |
| return NULL; |
| |
| buf = cbuf->bufs[cbuf->read]; |
| cbuf->read = (cbuf->read + 1) % cbuf->size; |
| |
| return buf; |
| } |
| |
| /** |
| * rtw_cbuf_alloc - allocate a rtw_cbuf with given size and do initialization |
| * @size: size of pointer |
| * |
| * Returns: pointer of srtuct rtw_cbuf, NULL for allocation failure |
| */ |
| struct rtw_cbuf *rtw_cbuf_alloc(u32 size) |
| { |
| struct rtw_cbuf *cbuf; |
| |
| cbuf = rtw_malloc(struct_size(cbuf, bufs, size)); |
| |
| if (cbuf) { |
| cbuf->write = cbuf->read = 0; |
| cbuf->size = size; |
| } |
| |
| return cbuf; |
| } |