diff options
Diffstat (limited to 'drivers/staging/r8188eu/os_dep/xmit_linux.c')
| -rw-r--r-- | drivers/staging/r8188eu/os_dep/xmit_linux.c | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/drivers/staging/r8188eu/os_dep/xmit_linux.c b/drivers/staging/r8188eu/os_dep/xmit_linux.c new file mode 100644 index 000000000000..565ac5be7db3 --- /dev/null +++ b/drivers/staging/r8188eu/os_dep/xmit_linux.c @@ -0,0 +1,251 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright(c) 2007 - 2012 Realtek Corporation. */ + +#define _XMIT_OSDEP_C_ + +#include "../include/osdep_service.h" +#include "../include/drv_types.h" +#include "../include/wifi.h" +#include "../include/mlme_osdep.h" +#include "../include/xmit_osdep.h" +#include "../include/osdep_intf.h" +#include "../include/usb_osintf.h" + +uint rtw_remainder_len(struct pkt_file *pfile) +{ + return pfile->buf_len - ((size_t)(pfile->cur_addr) - + (size_t)(pfile->buf_start)); +} + +void _rtw_open_pktfile(struct sk_buff *pktptr, struct pkt_file *pfile) +{ + + if (!pktptr) { + pr_err("8188eu: pktptr is NULL\n"); + return; + } + if (!pfile) { + pr_err("8188eu: pfile is NULL\n"); + return; + } + pfile->pkt = pktptr; + pfile->cur_addr = pktptr->data; + pfile->buf_start = pktptr->data; + pfile->pkt_len = pktptr->len; + pfile->buf_len = pktptr->len; + + pfile->cur_buffer = pfile->buf_start; + +} + +uint _rtw_pktfile_read(struct pkt_file *pfile, u8 *rmem, uint rlen) +{ + uint len = 0; + + len = rtw_remainder_len(pfile); + len = (rlen > len) ? len : rlen; + + if (rmem) + skb_copy_bits(pfile->pkt, pfile->buf_len - pfile->pkt_len, rmem, len); + + pfile->cur_addr += len; + pfile->pkt_len -= len; + + return len; +} + +int rtw_endofpktfile(struct pkt_file *pfile) +{ + + if (pfile->pkt_len == 0) { + + return true; + } + + return false; +} + +void rtw_set_tx_chksum_offload(struct sk_buff *pkt, struct pkt_attrib *pattrib) +{ +} + +int rtw_os_xmit_resource_alloc(struct adapter *padapter, struct xmit_buf *pxmitbuf, u32 alloc_sz) +{ + int i; + + pxmitbuf->pallocated_buf = kzalloc(alloc_sz, GFP_KERNEL); + if (!pxmitbuf->pallocated_buf) + return _FAIL; + + pxmitbuf->pbuf = (u8 *)N_BYTE_ALIGMENT((size_t)(pxmitbuf->pallocated_buf), XMITBUF_ALIGN_SZ); + pxmitbuf->dma_transfer_addr = 0; + + for (i = 0; i < 8; i++) { + pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL); + if (!pxmitbuf->pxmit_urb[i]) { + DBG_88E("pxmitbuf->pxmit_urb[i]==NULL"); + return _FAIL; + } + } + return _SUCCESS; +} + +void rtw_os_xmit_resource_free(struct adapter *padapter, + struct xmit_buf *pxmitbuf, u32 free_sz) +{ + int i; + + for (i = 0; i < 8; i++) + usb_free_urb(pxmitbuf->pxmit_urb[i]); + + kfree(pxmitbuf->pallocated_buf); +} + +#define WMM_XMIT_THRESHOLD (NR_XMITFRAME * 2 / 5) + +void rtw_os_pkt_complete(struct adapter *padapter, struct sk_buff *pkt) +{ + u16 queue; + struct xmit_priv *pxmitpriv = &padapter->xmitpriv; + + queue = skb_get_queue_mapping(pkt); + if (padapter->registrypriv.wifi_spec) { + if (__netif_subqueue_stopped(padapter->pnetdev, queue) && + (pxmitpriv->hwxmits[queue].accnt < WMM_XMIT_THRESHOLD)) + netif_wake_subqueue(padapter->pnetdev, queue); + } else { + if (__netif_subqueue_stopped(padapter->pnetdev, queue)) + netif_wake_subqueue(padapter->pnetdev, queue); + } + + dev_kfree_skb_any(pkt); +} + +void rtw_os_xmit_complete(struct adapter *padapter, struct xmit_frame *pxframe) +{ + if (pxframe->pkt) + rtw_os_pkt_complete(padapter, pxframe->pkt); + pxframe->pkt = NULL; +} + +void rtw_os_xmit_schedule(struct adapter *padapter) +{ + struct xmit_priv *pxmitpriv; + + if (!padapter) + return; + + pxmitpriv = &padapter->xmitpriv; + + spin_lock_bh(&pxmitpriv->lock); + + if (rtw_txframes_pending(padapter)) + tasklet_hi_schedule(&pxmitpriv->xmit_tasklet); + + spin_unlock_bh(&pxmitpriv->lock); +} + +static void rtw_check_xmit_resource(struct adapter *padapter, struct sk_buff *pkt) +{ + struct xmit_priv *pxmitpriv = &padapter->xmitpriv; + u16 queue; + + queue = skb_get_queue_mapping(pkt); + if (padapter->registrypriv.wifi_spec) { + /* No free space for Tx, tx_worker is too slow */ + if (pxmitpriv->hwxmits[queue].accnt > WMM_XMIT_THRESHOLD) + netif_stop_subqueue(padapter->pnetdev, queue); + } else { + if (pxmitpriv->free_xmitframe_cnt <= 4) { + if (!netif_tx_queue_stopped(netdev_get_tx_queue(padapter->pnetdev, queue))) + netif_stop_subqueue(padapter->pnetdev, queue); + } + } +} + +static int rtw_mlcst2unicst(struct adapter *padapter, struct sk_buff *skb) +{ + struct sta_priv *pstapriv = &padapter->stapriv; + struct xmit_priv *pxmitpriv = &padapter->xmitpriv; + struct list_head *phead, *plist; + struct sk_buff *newskb; + struct sta_info *psta = NULL; + s32 res; + + spin_lock_bh(&pstapriv->asoc_list_lock); + phead = &pstapriv->asoc_list; + plist = phead->next; + + /* free sta asoc_queue */ + while (phead != plist) { + psta = container_of(plist, struct sta_info, asoc_list); + + plist = plist->next; + + /* avoid come from STA1 and send back STA1 */ + if (!memcmp(psta->hwaddr, &skb->data[6], 6)) + continue; + + newskb = skb_copy(skb, GFP_ATOMIC); + + if (newskb) { + memcpy(newskb->data, psta->hwaddr, 6); + res = rtw_xmit(padapter, &newskb); + if (res < 0) { + DBG_88E("%s()-%d: rtw_xmit() return error!\n", __func__, __LINE__); + pxmitpriv->tx_drop++; + dev_kfree_skb_any(newskb); + } else { + pxmitpriv->tx_pkts++; + } + } else { + DBG_88E("%s-%d: skb_copy() failed!\n", __func__, __LINE__); + pxmitpriv->tx_drop++; + + spin_unlock_bh(&pstapriv->asoc_list_lock); + return false; /* Caller shall tx this multicast frame via normal way. */ + } + } + + spin_unlock_bh(&pstapriv->asoc_list_lock); + dev_kfree_skb_any(skb); + return true; +} + +int rtw_xmit_entry(struct sk_buff *pkt, struct net_device *pnetdev) +{ + struct adapter *padapter = (struct adapter *)rtw_netdev_priv(pnetdev); + struct xmit_priv *pxmitpriv = &padapter->xmitpriv; + struct mlme_priv *pmlmepriv = &padapter->mlmepriv; + s32 res = 0; + + if (!rtw_if_up(padapter)) + goto drop_packet; + + rtw_check_xmit_resource(padapter, pkt); + + if (!rtw_mc2u_disable && check_fwstate(pmlmepriv, WIFI_AP_STATE) && + (IP_MCAST_MAC(pkt->data) || ICMPV6_MCAST_MAC(pkt->data)) && + (padapter->registrypriv.wifi_spec == 0)) { + if (pxmitpriv->free_xmitframe_cnt > (NR_XMITFRAME / 4)) { + res = rtw_mlcst2unicst(padapter, pkt); + if (res) + goto exit; + } + } + + res = rtw_xmit(padapter, &pkt); + if (res < 0) + goto drop_packet; + + pxmitpriv->tx_pkts++; + goto exit; + +drop_packet: + pxmitpriv->tx_drop++; + dev_kfree_skb_any(pkt); + +exit: + + return 0; +} |