drivers/staging/rtl8723bs/os_dep/xmit_linux.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  12  * more details.
  13  *
  14  ******************************************************************************/
  15 #define _XMIT_OSDEP_C_
  16
  17 #include <drv_types.h>
  18 #include <rtw_debug.h>
  19
  20
  21 uint rtw_remainder_len(struct pkt_file *pfile)
  22 {
  23         return (pfile->buf_len - ((SIZE_PTR)(pfile->cur_addr) - (SIZE_PTR)(pfile->buf_start)));
  24 }
  25
  26 void _rtw_open_pktfile (_pkt *pktptr, struct pkt_file *pfile)
  27 {
  28         pfile->pkt = pktptr;
  29         pfile->cur_addr = pfile->buf_start = pktptr->data;
  30         pfile->pkt_len = pfile->buf_len = pktptr->len;
  31
  32         pfile->cur_buffer = pfile->buf_start ;
  33 }
  34
  35 uint _rtw_pktfile_read (struct pkt_file *pfile, u8 *rmem, uint rlen)
  36 {
  37         uint    len = 0;
  38
  39         len =  rtw_remainder_len(pfile);
  40         len = (rlen > len) ? len : rlen;
  41
  42         if (rmem)
  43                 skb_copy_bits(pfile->pkt, pfile->buf_len-pfile->pkt_len, rmem, len);
  44
  45         pfile->cur_addr += len;
  46         pfile->pkt_len -= len;
  47         return len;
  48 }
  49
  50 sint rtw_endofpktfile(struct pkt_file *pfile)
  51 {
  52         if (pfile->pkt_len == 0)
  53                 return true;
  54         return false;
  55 }
  56
  57 void rtw_set_tx_chksum_offload(_pkt *pkt, struct pkt_attrib *pattrib)
  58 {
  59
  60 }
  61
  62 int rtw_os_xmit_resource_alloc(struct adapter *padapter, struct xmit_buf *pxmitbuf, u32 alloc_sz, u8 flag)
  63 {
  64         if (alloc_sz > 0) {
  65                 pxmitbuf->pallocated_buf = rtw_zmalloc(alloc_sz);
  66                 if (pxmitbuf->pallocated_buf == NULL)
  67                 {
  68                         return _FAIL;
  69                 }
  70
  71                 pxmitbuf->pbuf = (u8 *)N_BYTE_ALIGMENT((SIZE_PTR)(pxmitbuf->pallocated_buf), XMITBUF_ALIGN_SZ);
  72         }
  73
  74         return _SUCCESS;
  75 }
  76
  77 void rtw_os_xmit_resource_free(struct adapter *padapter, struct xmit_buf *pxmitbuf, u32 free_sz, u8 flag)
  78 {
  79         if (free_sz > 0)
  80                 kfree(pxmitbuf->pallocated_buf);
  81 }
  82
  83 #define WMM_XMIT_THRESHOLD      (NR_XMITFRAME*2/5)
  84
  85 void rtw_os_pkt_complete(struct adapter *padapter, _pkt *pkt)
  86 {
  87         u16 queue;
  88         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
  89
  90         queue = skb_get_queue_mapping(pkt);
  91         if (padapter->registrypriv.wifi_spec) {
  92                 if (__netif_subqueue_stopped(padapter->pnetdev, queue) &&
  93                         (pxmitpriv->hwxmits[queue].accnt < WMM_XMIT_THRESHOLD))
  94                 {
  95                         netif_wake_subqueue(padapter->pnetdev, queue);
  96                 }
  97         } else {
  98                 if (__netif_subqueue_stopped(padapter->pnetdev, queue))
  99                         netif_wake_subqueue(padapter->pnetdev, queue);
 100         }
 101
 102         dev_kfree_skb_any(pkt);
 103 }
 104
 105 void rtw_os_xmit_complete(struct adapter *padapter, struct xmit_frame *pxframe)
 106 {
 107         if (pxframe->pkt)
 108                 rtw_os_pkt_complete(padapter, pxframe->pkt);
 109
 110         pxframe->pkt = NULL;
 111 }
 112
 113 void rtw_os_xmit_schedule(struct adapter *padapter)
 114 {
 115         struct adapter *pri_adapter = padapter;
 116
 117         if (!padapter)
 118                 return;
 119
 120         if (!list_empty(&padapter->xmitpriv.pending_xmitbuf_queue.queue))
 121                 up(&pri_adapter->xmitpriv.xmit_sema);
 122 }
 123
 124 static void rtw_check_xmit_resource(struct adapter *padapter, _pkt *pkt)
 125 {
 126         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 127         u16 queue;
 128
 129         queue = skb_get_queue_mapping(pkt);
 130         if (padapter->registrypriv.wifi_spec) {
 131                 /* No free space for Tx, tx_worker is too slow */
 132                 if (pxmitpriv->hwxmits[queue].accnt > WMM_XMIT_THRESHOLD) {
 133                         /* DBG_871X("%s(): stop netif_subqueue[%d]\n", __func__, queue); */
 134                         netif_stop_subqueue(padapter->pnetdev, queue);
 135                 }
 136         } else {
 137                 if (pxmitpriv->free_xmitframe_cnt <= 4) {
 138                         if (!netif_tx_queue_stopped(netdev_get_tx_queue(padapter->pnetdev, queue)))
 139                                 netif_stop_subqueue(padapter->pnetdev, queue);
 140                 }
 141         }
 142 }
 143
 144 static int rtw_mlcst2unicst(struct adapter *padapter, struct sk_buff *skb)
 145 {
 146         struct  sta_priv *pstapriv = &padapter->stapriv;
 147         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 148         struct list_head        *phead, *plist;
 149         struct sk_buff *newskb;
 150         struct sta_info *psta = NULL;
 151         u8 chk_alive_num = 0;
 152         char chk_alive_list[NUM_STA];
 153         u8 bc_addr[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 154         u8 null_addr[6] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 155
 156         int i;
 157         s32     res;
 158
 159         DBG_COUNTER(padapter->tx_logs.os_tx_m2u);
 160
 161         spin_lock_bh(&pstapriv->asoc_list_lock);
 162         phead = &pstapriv->asoc_list;
 163         plist = get_next(phead);
 164
 165         /* free sta asoc_queue */
 166         while (phead != plist) {
 167                 int stainfo_offset;
 168                 psta = LIST_CONTAINOR(plist, struct sta_info, asoc_list);
 169                 plist = get_next(plist);
 170
 171                 stainfo_offset = rtw_stainfo_offset(pstapriv, psta);
 172                 if (stainfo_offset_valid(stainfo_offset)) {
 173                         chk_alive_list[chk_alive_num++] = stainfo_offset;
 174                 }
 175         }
 176         spin_unlock_bh(&pstapriv->asoc_list_lock);
 177
 178         for (i = 0; i < chk_alive_num; i++) {
 179                 psta = rtw_get_stainfo_by_offset(pstapriv, chk_alive_list[i]);
 180                 if (!(psta->state & _FW_LINKED))
 181                 {
 182                         DBG_COUNTER(padapter->tx_logs.os_tx_m2u_ignore_fw_linked);
 183                         continue;
 184                 }
 185
 186                 /* avoid come from STA1 and send back STA1 */
 187                 if (!memcmp(psta->hwaddr, &skb->data[6], 6)
 188                         || !memcmp(psta->hwaddr, null_addr, 6)
 189                         || !memcmp(psta->hwaddr, bc_addr, 6)
 190                 )
 191                 {
 192                         DBG_COUNTER(padapter->tx_logs.os_tx_m2u_ignore_self);
 193                         continue;
 194                 }
 195
 196                 DBG_COUNTER(padapter->tx_logs.os_tx_m2u_entry);
 197
 198                 newskb = rtw_skb_copy(skb);
 199
 200                 if (newskb) {
 201                         memcpy(newskb->data, psta->hwaddr, 6);
 202                         res = rtw_xmit(padapter, &newskb);
 203                         if (res < 0) {
 204                                 DBG_COUNTER(padapter->tx_logs.os_tx_m2u_entry_err_xmit);
 205                                 DBG_871X("%s()-%d: rtw_xmit() return error!\n", __func__, __LINE__);
 206                                 pxmitpriv->tx_drop++;
 207                                 dev_kfree_skb_any(newskb);
 208                         }
 209                 } else {
 210                         DBG_COUNTER(padapter->tx_logs.os_tx_m2u_entry_err_skb);
 211                         DBG_871X("%s-%d: rtw_skb_copy() failed!\n", __func__, __LINE__);
 212                         pxmitpriv->tx_drop++;
 213                         /* dev_kfree_skb_any(skb); */
 214                         return false;   /*  Caller shall tx this multicast frame via normal way. */
 215                 }
 216         }
 217
 218         dev_kfree_skb_any(skb);
 219         return true;
 220 }
 221
 222 int _rtw_xmit_entry(_pkt *pkt, _nic_hdl pnetdev)
 223 {
 224         struct adapter *padapter = (struct adapter *)rtw_netdev_priv(pnetdev);
 225         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 226         struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
 227         s32 res = 0;
 228
 229         DBG_COUNTER(padapter->tx_logs.os_tx);
 230         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("+xmit_enry\n"));
 231
 232         if (rtw_if_up(padapter) == false) {
 233                 DBG_COUNTER(padapter->tx_logs.os_tx_err_up);
 234                 RT_TRACE(_module_xmit_osdep_c_, _drv_err_, ("rtw_xmit_entry: rtw_if_up fail\n"));
 235                 #ifdef DBG_TX_DROP_FRAME
 236                 DBG_871X("DBG_TX_DROP_FRAME %s if_up fail\n", __func__);
 237                 #endif
 238                 goto drop_packet;
 239         }
 240
 241         rtw_check_xmit_resource(padapter, pkt);
 242
 243         if (!rtw_mc2u_disable
 244                 && check_fwstate(pmlmepriv, WIFI_AP_STATE) == true
 245                 && (IP_MCAST_MAC(pkt->data)
 246                         || ICMPV6_MCAST_MAC(pkt->data)
 247                         #ifdef CONFIG_TX_BCAST2UNI
 248                         || is_broadcast_mac_addr(pkt->data)
 249                         #endif
 250                         )
 251                 && (padapter->registrypriv.wifi_spec == 0)
 252                 )
 253         {
 254                 if (pxmitpriv->free_xmitframe_cnt > (NR_XMITFRAME/4)) {
 255                         res = rtw_mlcst2unicst(padapter, pkt);
 256                         if (res == true) {
 257                                 goto exit;
 258                         }
 259                 } else {
 260                         /* DBG_871X("Stop M2U(%d, %d)! ", pxmitpriv->free_xmitframe_cnt, pxmitpriv->free_xmitbuf_cnt); */
 261                         /* DBG_871X("!m2u); */
 262                         DBG_COUNTER(padapter->tx_logs.os_tx_m2u_stop);
 263                 }
 264         }
 265
 266         res = rtw_xmit(padapter, &pkt);
 267         if (res < 0) {
 268                 #ifdef DBG_TX_DROP_FRAME
 269                 DBG_871X("DBG_TX_DROP_FRAME %s rtw_xmit fail\n", __func__);
 270                 #endif
 271                 goto drop_packet;
 272         }
 273
 274         RT_TRACE(_module_xmit_osdep_c_, _drv_info_, ("rtw_xmit_entry: tx_pkts =%d\n", (u32)pxmitpriv->tx_pkts));
 275         goto exit;
 276
 277 drop_packet:
 278         pxmitpriv->tx_drop++;
 279         dev_kfree_skb_any(pkt);
 280         RT_TRACE(_module_xmit_osdep_c_, _drv_notice_, ("rtw_xmit_entry: drop, tx_drop =%d\n", (u32)pxmitpriv->tx_drop));
 281
 282 exit:
 283         return 0;
 284 }
 285
 286 int rtw_xmit_entry(_pkt *pkt, _nic_hdl pnetdev)
 287 {
 288         int ret = 0;
 289
 290         if (pkt) {
 291                 rtw_mstat_update(MSTAT_TYPE_SKB, MSTAT_ALLOC_SUCCESS, pkt->truesize);
 292                 ret = _rtw_xmit_entry(pkt, pnetdev);
 293         }
 294
 295         return ret;
 296 }