| // 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/recv_osdep.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 |
| */ |
| |
| inline u32 rtw_systime_to_ms(u32 systime) |
| { |
| return systime * 1000 / HZ; |
| } |
| |
| inline u32 rtw_ms_to_systime(u32 ms) |
| { |
| return ms * HZ / 1000; |
| } |
| |
| /* the input parameter start use the same unit as jiffies */ |
| inline s32 rtw_get_passing_time_ms(u32 start) |
| { |
| return rtw_systime_to_ms(jiffies - start); |
| } |
| |
| void rtw_usleep_os(int us) |
| { |
| if (1 < (us / 1000)) |
| msleep(1); |
| else |
| msleep((us / 1000) + 1); |
| } |
| |
| 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) |
| goto RETURN; |
| |
| pnetdev->dev.type = &wlan_type; |
| 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) { |
| 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) ? true : false; |
| } |
| |
| /** |
| * 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; |
| |
| if (0) |
| DBG_88E("%s on %u\n", __func__, cbuf->read); |
| 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; |
| } |