diff options
Diffstat (limited to 'drivers/staging/r8188eu/os_dep/osdep_service.c')
| -rw-r--r-- | drivers/staging/r8188eu/os_dep/osdep_service.c | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/drivers/staging/r8188eu/os_dep/osdep_service.c b/drivers/staging/r8188eu/os_dep/osdep_service.c new file mode 100644 index 000000000..88271f956 --- /dev/null +++ b/drivers/staging/r8188eu/os_dep/osdep_service.c @@ -0,0 +1,227 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright(c) 2007 - 2012 Realtek Corporation. */ + +#define _OSDEP_SERVICE_C_ + +#include "../include/osdep_service.h" +#include "../include/drv_types.h" +#include "../include/rtw_ioctl_set.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_malloc2d(int h, int w, int size) +{ + int j; + + void **a = kzalloc(h * sizeof(void *) + h * w * size, GFP_KERNEL); + if (!a) + return NULL; + + for (j = 0; j < h; j++) + a[j] = ((char *)(a + h)) + j * w * size; + + return a; +} + +/* +For the following list_xxx operations, +caller must guarantee the atomic context. +Otherwise, there will be racing condition. +*/ +/* +Caller must check if the list is empty before calling rtw_list_delete +*/ + +static const struct device_type wlan_type = { + .name = "wlan", +}; + +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) + return NULL; + + pnetdev->dev.type = &wlan_type; + pnpi = netdev_priv(pnetdev); + pnpi->priv = old_priv; + pnpi->sizeof_priv = sizeof_priv; + + 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) + return NULL; + + pnpi = netdev_priv(pnetdev); + + pnpi->priv = vzalloc(sizeof_priv); + if (!pnpi->priv) { + free_netdev(pnetdev); + return NULL; + } + + pnpi->sizeof_priv = sizeof_priv; + + return pnetdev; +} + +void rtw_free_netdev(struct net_device *netdev) +{ + struct rtw_netdev_priv_indicator *pnpi; + + pnpi = netdev_priv(netdev); + + vfree(pnpi->priv); + free_netdev(netdev); +} + +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) { + ret = -1; + 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_update(u8 **buf, u32 *buf_len, u8 *src, u32 src_len) +{ + u32 dup_len = 0; + u8 *ori = NULL; + u8 *dup = NULL; + + if (!buf || !buf_len) + return; + + if (!src || !src_len) + goto keep_ori; + + /* duplicate src */ + dup = kmalloc(src_len, GFP_ATOMIC); + if (dup) { + dup_len = src_len; + memcpy(dup, src, dup_len); + } + +keep_ori: + ori = *buf; + + /* replace buf with dup */ + *buf_len = 0; + *buf = dup; + *buf_len = dup_len; + + /* free ori */ + kfree(ori); +} + +/** + * 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; +} + +/** + * 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 = kmalloc(struct_size(cbuf, bufs, size), GFP_KERNEL); + + if (cbuf) { + cbuf->write = 0; + cbuf->read = 0; + cbuf->size = size; + } + return cbuf; +} |