drivers/staging/rtl8188eu/os_dep/xmit_linux.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /******************************************************************************
   3  *
   4  * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
   5  *
   6  ******************************************************************************/
   7 #define _XMIT_OSDEP_C_
   8
   9 #include <osdep_service.h>
  10 #include <drv_types.h>
  11
  12 #include <wifi.h>
  13 #include <mlme_osdep.h>
  14 #include <xmit_osdep.h>
  15 #include <osdep_intf.h>
  16
  17 int rtw_os_xmit_resource_alloc(struct adapter *padapter, struct xmit_buf *pxmitbuf, u32 alloc_sz)
  18 {
  19         int i;
  20
  21         pxmitbuf->pallocated_buf = kzalloc(alloc_sz, GFP_KERNEL);
  22         if (!pxmitbuf->pallocated_buf)
  23                 return _FAIL;
  24
  25         pxmitbuf->pbuf = PTR_ALIGN(pxmitbuf->pallocated_buf, XMITBUF_ALIGN_SZ);
  26         pxmitbuf->dma_transfer_addr = 0;
  27
  28         for (i = 0; i < 8; i++) {
  29                 pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
  30                 if (!pxmitbuf->pxmit_urb[i]) {
  31                         DBG_88E("pxmitbuf->pxmit_urb[i]==NULL");
  32                         return _FAIL;
  33                 }
  34         }
  35         return _SUCCESS;
  36 }
  37
  38 void rtw_os_xmit_resource_free(struct xmit_buf *pxmitbuf)
  39 {
  40         int i;
  41
  42         for (i = 0; i < 8; i++)
  43                 usb_free_urb(pxmitbuf->pxmit_urb[i]);
  44
  45         kfree(pxmitbuf->pallocated_buf);
  46 }
  47
  48 #define WMM_XMIT_THRESHOLD      (NR_XMITFRAME*2/5)
  49
  50 void rtw_os_pkt_complete(struct adapter *padapter, struct sk_buff *pkt)
  51 {
  52         u16     queue;
  53         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
  54
  55         queue = skb_get_queue_mapping(pkt);
  56         if (padapter->registrypriv.wifi_spec) {
  57                 if (__netif_subqueue_stopped(padapter->pnetdev, queue) &&
  58                     (pxmitpriv->hwxmits[queue].accnt < WMM_XMIT_THRESHOLD))
  59                         netif_wake_subqueue(padapter->pnetdev, queue);
  60         } else {
  61                 if (__netif_subqueue_stopped(padapter->pnetdev, queue))
  62                         netif_wake_subqueue(padapter->pnetdev, queue);
  63         }
  64
  65         dev_kfree_skb_any(pkt);
  66 }
  67
  68 void rtw_os_xmit_complete(struct adapter *padapter, struct xmit_frame *pxframe)
  69 {
  70         if (pxframe->pkt)
  71                 rtw_os_pkt_complete(padapter, pxframe->pkt);
  72         pxframe->pkt = NULL;
  73 }
  74
  75 void rtw_os_xmit_schedule(struct adapter *padapter)
  76 {
  77         struct xmit_priv *pxmitpriv;
  78
  79         if (!padapter)
  80                 return;
  81
  82         pxmitpriv = &padapter->xmitpriv;
  83
  84         spin_lock_bh(&pxmitpriv->lock);
  85
  86         if (rtw_txframes_pending(padapter))
  87                 tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
  88
  89         spin_unlock_bh(&pxmitpriv->lock);
  90 }
  91
  92 static void rtw_check_xmit_resource(struct adapter *padapter, struct sk_buff *pkt)
  93 {
  94         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
  95         u16     queue;
  96
  97         queue = skb_get_queue_mapping(pkt);
  98         if (padapter->registrypriv.wifi_spec) {
  99                 /* No free space for Tx, tx_worker is too slow */
 100                 if (pxmitpriv->hwxmits[queue].accnt > WMM_XMIT_THRESHOLD)
 101                         netif_stop_subqueue(padapter->pnetdev, queue);
 102         } else {
 103                 if (pxmitpriv->free_xmitframe_cnt <= 4) {
 104                         if (!netif_tx_queue_stopped(netdev_get_tx_queue(padapter->pnetdev, queue)))
 105                                 netif_stop_subqueue(padapter->pnetdev, queue);
 106                 }
 107         }
 108 }
 109
 110 static int rtw_mlcst2unicst(struct adapter *padapter, struct sk_buff *skb)
 111 {
 112         struct  sta_priv *pstapriv = &padapter->stapriv;
 113         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 114         struct list_head *phead, *plist;
 115         struct sk_buff *newskb;
 116         struct sta_info *psta = NULL;
 117         s32     res;
 118
 119         spin_lock_bh(&pstapriv->asoc_list_lock);
 120         phead = &pstapriv->asoc_list;
 121         plist = phead->next;
 122
 123         /* free sta asoc_queue */
 124         while (phead != plist) {
 125                 psta = container_of(plist, struct sta_info, asoc_list);
 126
 127                 plist = plist->next;
 128
 129                 /* avoid   come from STA1 and send back STA1 */
 130                 if (!memcmp(psta->hwaddr, &skb->data[6], 6))
 131                         continue;
 132
 133                 newskb = skb_copy(skb, GFP_ATOMIC);
 134
 135                 if (newskb) {
 136                         memcpy(newskb->data, psta->hwaddr, 6);
 137                         res = rtw_xmit(padapter, &newskb);
 138                         if (res < 0) {
 139                                 DBG_88E("%s()-%d: rtw_xmit() return error!\n", __func__, __LINE__);
 140                                 pxmitpriv->tx_drop++;
 141                                 dev_kfree_skb_any(newskb);
 142                         } else {
 143                                 pxmitpriv->tx_pkts++;
 144                         }
 145                 } else {
 146                         DBG_88E("%s-%d: skb_copy() failed!\n", __func__, __LINE__);
 147                         pxmitpriv->tx_drop++;
 148
 149                         spin_unlock_bh(&pstapriv->asoc_list_lock);
 150                         return false;   /*  Caller shall tx this multicast frame via normal way. */
 151                 }
 152         }
 153
 154         spin_unlock_bh(&pstapriv->asoc_list_lock);
 155         dev_kfree_skb_any(skb);
 156         return true;
 157 }
 158
 159 int rtw_xmit_entry(struct sk_buff *pkt, struct  net_device *pnetdev)
 160 {
 161         struct adapter *padapter = (struct adapter *)rtw_netdev_priv(pnetdev);
 162         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 163         struct mlme_priv        *pmlmepriv = &padapter->mlmepriv;
 164         s32 res = 0;
 165
 166         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("+xmit_enry\n"));
 167
 168         if (rtw_if_up(padapter) == false) {
 169                 RT_TRACE(_module_xmit_osdep_c_, _drv_err_, ("rtw_xmit_entry: rtw_if_up fail\n"));
 170                 goto drop_packet;
 171         }
 172
 173         rtw_check_xmit_resource(padapter, pkt);
 174
 175         if (!rtw_mc2u_disable && check_fwstate(pmlmepriv, WIFI_AP_STATE) &&
 176             (IP_MCAST_MAC(pkt->data) || ICMPV6_MCAST_MAC(pkt->data)) &&
 177             (padapter->registrypriv.wifi_spec == 0)) {
 178                 if (pxmitpriv->free_xmitframe_cnt > (NR_XMITFRAME/4)) {
 179                         res = rtw_mlcst2unicst(padapter, pkt);
 180                         if (res)
 181                                 goto exit;
 182                 }
 183         }
 184
 185         res = rtw_xmit(padapter, &pkt);
 186         if (res < 0)
 187                 goto drop_packet;
 188
 189         pxmitpriv->tx_pkts++;
 190         RT_TRACE(_module_xmit_osdep_c_, _drv_info_, ("rtw_xmit_entry: tx_pkts=%d\n", (u32)pxmitpriv->tx_pkts));
 191         goto exit;
 192
 193 drop_packet:
 194         pxmitpriv->tx_drop++;
 195         dev_kfree_skb_any(pkt);
 196         RT_TRACE(_module_xmit_osdep_c_, _drv_notice_, ("rtw_xmit_entry: drop, tx_drop=%d\n", (u32)pxmitpriv->tx_drop));
 197
 198 exit:
 199         return 0;
 200 }