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  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  *
  19  ******************************************************************************/
  20 #define _XMIT_OSDEP_C_
  21
  22 #include <drv_conf.h>
  23 #include <osdep_service.h>
  24 #include <drv_types.h>
  25
  26 #include <if_ether.h>
  27 #include <ip.h>
  28 #include <wifi.h>
  29 #include <mlme_osdep.h>
  30 #include <xmit_osdep.h>
  31 #include <osdep_intf.h>
  32 #include <circ_buf.h>
  33
  34 uint rtw_remainder_len(struct pkt_file *pfile)
  35 {
  36         return (pfile->buf_len - ((SIZE_PTR)(pfile->cur_addr) - (SIZE_PTR)(pfile->buf_start)));
  37 }
  38
  39 void _rtw_open_pktfile (_pkt *pktptr, struct pkt_file *pfile)
  40 {
  41 _func_enter_;
  42
  43         pfile->pkt = pktptr;
  44         pfile->cur_addr = pfile->buf_start = pktptr->data;
  45         pfile->pkt_len = pfile->buf_len = pktptr->len;
  46
  47         pfile->cur_buffer = pfile->buf_start ;
  48
  49 _func_exit_;
  50 }
  51
  52 uint _rtw_pktfile_read (struct pkt_file *pfile, u8 *rmem, uint rlen)
  53 {
  54         uint    len = 0;
  55
  56 _func_enter_;
  57
  58        len =  rtw_remainder_len(pfile);
  59         len = (rlen > len)? len: rlen;
  60
  61        if(rmem)
  62           skb_copy_bits(pfile->pkt, pfile->buf_len-pfile->pkt_len, rmem, len);
  63
  64        pfile->cur_addr += len;
  65        pfile->pkt_len -= len;
  66
  67 _func_exit_;
  68
  69         return len;
  70 }
  71
  72 sint rtw_endofpktfile(struct pkt_file *pfile)
  73 {
  74 _func_enter_;
  75
  76         if (pfile->pkt_len == 0) {
  77 _func_exit_;
  78                 return _TRUE;
  79         }
  80
  81 _func_exit_;
  82
  83         return _FALSE;
  84 }
  85
  86 void rtw_set_tx_chksum_offload(_pkt *pkt, struct pkt_attrib *pattrib)
  87 {
  88
  89 #ifdef CONFIG_TCP_CSUM_OFFLOAD_TX
  90         struct sk_buff *skb = (struct sk_buff *)pkt;
  91         pattrib->hw_tcp_csum = 0;
  92
  93         if (skb->ip_summed == CHECKSUM_PARTIAL) {
  94                 if (skb_shinfo(skb)->nr_frags == 0)
  95                 {
  96                         const struct iphdr *ip = ip_hdr(skb);
  97                         if (ip->protocol == IPPROTO_TCP) {
  98                                 // TCP checksum offload by HW
  99                                 DBG_8723A("CHECKSUM_PARTIAL TCP\n");
 100                                 pattrib->hw_tcp_csum = 1;
 101                                 //skb_checksum_help(skb);
 102                         } else if (ip->protocol == IPPROTO_UDP) {
 103                                 //DBG_8723A("CHECKSUM_PARTIAL UDP\n");
 104 #if 1
 105                                 skb_checksum_help(skb);
 106 #else
 107                                 // Set UDP checksum = 0 to skip checksum check
 108                                 struct udphdr *udp = skb_transport_header(skb);
 109                                 udp->check = 0;
 110 #endif
 111                         } else {
 112                                 DBG_8723A("%s-%d TCP CSUM offload Error!!\n", __FUNCTION__, __LINE__);
 113                                 WARN_ON(1);     /* we need a WARN() */
 114                             }
 115                 }
 116                 else { // IP fragmentation case
 117                         DBG_8723A("%s-%d nr_frags != 0, using skb_checksum_help(skb);!!\n", __FUNCTION__, __LINE__);
 118                         skb_checksum_help(skb);
 119                 }
 120         }
 121 #endif
 122
 123 }
 124
 125 int rtw_os_xmit_resource_alloc(_adapter *padapter, struct xmit_buf *pxmitbuf,u32 alloc_sz)
 126 {
 127 #ifdef CONFIG_USB_HCI
 128         int i;
 129         struct dvobj_priv       *pdvobjpriv = adapter_to_dvobj(padapter);
 130         struct usb_device       *pusbd = pdvobjpriv->pusbdev;
 131
 132 #ifdef CONFIG_USE_USB_BUFFER_ALLOC_TX
 133         pxmitbuf->pallocated_buf = rtw_usb_buffer_alloc(pusbd, (size_t)alloc_sz, &pxmitbuf->dma_transfer_addr);
 134         pxmitbuf->pbuf = pxmitbuf->pallocated_buf;
 135         if(pxmitbuf->pallocated_buf == NULL)
 136                 return _FAIL;
 137 #else // CONFIG_USE_USB_BUFFER_ALLOC_TX
 138
 139         pxmitbuf->pallocated_buf = rtw_zmalloc(alloc_sz);
 140         if (pxmitbuf->pallocated_buf == NULL)
 141         {
 142                 return _FAIL;
 143         }
 144
 145         pxmitbuf->pbuf = (u8 *)N_BYTE_ALIGMENT((SIZE_PTR)(pxmitbuf->pallocated_buf), XMITBUF_ALIGN_SZ);
 146         pxmitbuf->dma_transfer_addr = 0;
 147
 148 #endif // CONFIG_USE_USB_BUFFER_ALLOC_TX
 149
 150         for(i=0; i<8; i++)
 151         {
 152                 pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
 153                 if(pxmitbuf->pxmit_urb[i] == NULL)
 154                 {
 155                         DBG_8723A("pxmitbuf->pxmit_urb[i]==NULL");
 156                         return _FAIL;
 157                 }
 158
 159         }
 160 #endif
 161 #if defined(CONFIG_PCI_HCI) || defined(CONFIG_SDIO_HCI) || defined(CONFIG_GSPI_HCI)
 162         pxmitbuf->pallocated_buf = rtw_zmalloc(alloc_sz);
 163         if (pxmitbuf->pallocated_buf == NULL)
 164         {
 165                 return _FAIL;
 166         }
 167
 168         pxmitbuf->pbuf = (u8 *)N_BYTE_ALIGMENT((SIZE_PTR)(pxmitbuf->pallocated_buf), XMITBUF_ALIGN_SZ);
 169 #endif
 170
 171         return _SUCCESS;
 172 }
 173
 174 void rtw_os_xmit_resource_free(_adapter *padapter, struct xmit_buf *pxmitbuf,u32 free_sz)
 175 {
 176 #ifdef CONFIG_USB_HCI
 177         int i;
 178         struct dvobj_priv       *pdvobjpriv = adapter_to_dvobj(padapter);
 179         struct usb_device       *pusbd = pdvobjpriv->pusbdev;
 180
 181
 182         for(i=0; i<8; i++)
 183         {
 184                 if(pxmitbuf->pxmit_urb[i])
 185                 {
 186                         //usb_kill_urb(pxmitbuf->pxmit_urb[i]);
 187                         usb_free_urb(pxmitbuf->pxmit_urb[i]);
 188                 }
 189         }
 190
 191 #ifdef CONFIG_USE_USB_BUFFER_ALLOC_TX
 192         rtw_usb_buffer_free(pusbd, (size_t)free_sz, pxmitbuf->pallocated_buf, pxmitbuf->dma_transfer_addr);
 193         pxmitbuf->pallocated_buf =  NULL;
 194         pxmitbuf->dma_transfer_addr = 0;
 195 #else   // CONFIG_USE_USB_BUFFER_ALLOC_TX
 196         if(pxmitbuf->pallocated_buf)
 197                 rtw_mfree(pxmitbuf->pallocated_buf, free_sz);
 198 #endif  // CONFIG_USE_USB_BUFFER_ALLOC_TX
 199
 200 #endif
 201 #if defined(CONFIG_PCI_HCI) || defined(CONFIG_SDIO_HCI) || defined(CONFIG_GSPI_HCI)
 202         if(pxmitbuf->pallocated_buf)
 203                 rtw_mfree(pxmitbuf->pallocated_buf, free_sz);
 204 #endif
 205 }
 206
 207 #define WMM_XMIT_THRESHOLD      (NR_XMITFRAME*2/5)
 208
 209 void rtw_os_pkt_complete(_adapter *padapter, _pkt *pkt)
 210 {
 211 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 212         u16     queue;
 213         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 214
 215         queue = skb_get_queue_mapping(pkt);
 216         if (padapter->registrypriv.wifi_spec) {
 217                 if(__netif_subqueue_stopped(padapter->pnetdev, queue) &&
 218                         (pxmitpriv->hwxmits[queue].accnt < WMM_XMIT_THRESHOLD))
 219                 {
 220                         netif_wake_subqueue(padapter->pnetdev, queue);
 221                 }
 222         } else {
 223                 if(__netif_subqueue_stopped(padapter->pnetdev, queue))
 224                         netif_wake_subqueue(padapter->pnetdev, queue);
 225         }
 226 #else
 227         if (netif_queue_stopped(padapter->pnetdev))
 228                 netif_wake_queue(padapter->pnetdev);
 229 #endif
 230
 231         dev_kfree_skb_any(pkt);
 232 }
 233
 234 void rtw_os_xmit_complete(_adapter *padapter, struct xmit_frame *pxframe)
 235 {
 236         if(pxframe->pkt)
 237         {
 238                 //RT_TRACE(_module_xmit_osdep_c_,_drv_err_,("linux : rtw_os_xmit_complete, dev_kfree_skb()\n"));
 239
 240                 //dev_kfree_skb_any(pxframe->pkt);
 241                 rtw_os_pkt_complete(padapter, pxframe->pkt);
 242
 243         }
 244
 245         pxframe->pkt = NULL;
 246 }
 247
 248 void rtw_os_xmit_schedule(_adapter *padapter)
 249 {
 250         _adapter *pri_adapter = padapter;
 251
 252 #if defined(CONFIG_SDIO_HCI) || defined(CONFIG_GSPI_HCI)
 253         if(!padapter)
 254                 return;
 255
 256 #ifdef CONFIG_CONCURRENT_MODE
 257         if(padapter->adapter_type > PRIMARY_ADAPTER)
 258                 pri_adapter = padapter->pbuddy_adapter;
 259 #endif
 260
 261         if (_rtw_queue_empty(&pri_adapter->xmitpriv.pending_xmitbuf_queue) == _FALSE)
 262                 _rtw_up_sema(&pri_adapter->xmitpriv.xmit_sema);
 263
 264
 265 #else
 266         _irqL  irqL;
 267         struct xmit_priv *pxmitpriv;
 268
 269         if(!padapter)
 270                 return;
 271
 272         pxmitpriv = &padapter->xmitpriv;
 273
 274         _enter_critical_bh(&pxmitpriv->lock, &irqL);
 275
 276         if(rtw_txframes_pending(padapter))
 277         {
 278                 tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
 279         }
 280
 281         _exit_critical_bh(&pxmitpriv->lock, &irqL);
 282 #endif
 283 }
 284
 285 static void rtw_check_xmit_resource(_adapter *padapter, _pkt *pkt)
 286 {
 287         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 288 #if (LINUX_VERSION_CODE>=KERNEL_VERSION(2,6,35))
 289         u16     queue;
 290
 291         queue = skb_get_queue_mapping(pkt);
 292         if (padapter->registrypriv.wifi_spec) {
 293                 /* No free space for Tx, tx_worker is too slow */
 294                 if (pxmitpriv->hwxmits[queue].accnt > WMM_XMIT_THRESHOLD) {
 295                         //DBG_8723A("%s(): stop netif_subqueue[%d]\n", __FUNCTION__, queue);
 296                         netif_stop_subqueue(padapter->pnetdev, queue);
 297                 }
 298         } else {
 299                 if(pxmitpriv->free_xmitframe_cnt<=4) {
 300                         if (!netif_tx_queue_stopped(netdev_get_tx_queue(padapter->pnetdev, queue)))
 301                                 netif_stop_subqueue(padapter->pnetdev, queue);
 302                 }
 303         }
 304 #else
 305         if(pxmitpriv->free_xmitframe_cnt<=4)
 306         {
 307                 if (!rtw_netif_queue_stopped(padapter->pnetdev))
 308                         rtw_netif_stop_queue(padapter->pnetdev);
 309         }
 310 #endif
 311 }
 312
 313 #ifdef CONFIG_TX_MCAST2UNI
 314 int rtw_mlcst2unicst(_adapter *padapter, struct sk_buff *skb)
 315 {
 316         struct  sta_priv *pstapriv = &padapter->stapriv;
 317         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 318         _irqL   irqL;
 319         _list   *phead, *plist;
 320         struct sk_buff *newskb;
 321         struct sta_info *psta = NULL;
 322         u8 chk_alive_num = 0;
 323         char chk_alive_list[NUM_STA];
 324         u8 bc_addr[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 325         u8 null_addr[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 326
 327         int i;
 328         s32     res;
 329
 330         _enter_critical_bh(&pstapriv->asoc_list_lock, &irqL);
 331         phead = &pstapriv->asoc_list;
 332         plist = get_next(phead);
 333
 334         //free sta asoc_queue
 335         while ((rtw_end_of_queue_search(phead, plist)) == _FALSE) {
 336                 int stainfo_offset;
 337                 psta = LIST_CONTAINOR(plist, struct sta_info, asoc_list);
 338                 plist = get_next(plist);
 339
 340                 stainfo_offset = rtw_stainfo_offset(pstapriv, psta);
 341                 if (stainfo_offset_valid(stainfo_offset)) {
 342                         chk_alive_list[chk_alive_num++] = stainfo_offset;
 343                 }
 344         }
 345         _exit_critical_bh(&pstapriv->asoc_list_lock, &irqL);
 346
 347         for (i = 0; i < chk_alive_num; i++) {
 348                 psta = rtw_get_stainfo_by_offset(pstapriv, chk_alive_list[i]);
 349                 if(!(psta->state &_FW_LINKED))
 350                         continue;
 351
 352                 /* avoid come from STA1 and send back STA1 */
 353                 if (_rtw_memcmp(psta->hwaddr, &skb->data[6], 6) == _TRUE
 354                         || _rtw_memcmp(psta->hwaddr, null_addr, 6) == _TRUE
 355                         || _rtw_memcmp(psta->hwaddr, bc_addr, 6) == _TRUE
 356                 )
 357                         continue;
 358
 359                 newskb = skb_copy(skb, GFP_ATOMIC);
 360
 361                 if (newskb) {
 362                         _rtw_memcpy(newskb->data, psta->hwaddr, 6);
 363                         res = rtw_xmit(padapter, &newskb);
 364                         if (res < 0) {
 365                                 DBG_8723A("%s()-%d: rtw_xmit() return error!\n", __FUNCTION__, __LINE__);
 366                                 pxmitpriv->tx_drop++;
 367                                 dev_kfree_skb_any(newskb);
 368                         } else
 369                                 pxmitpriv->tx_pkts++;
 370                 } else {
 371                         DBG_8723A("%s-%d: skb_copy() failed!\n", __FUNCTION__, __LINE__);
 372                         pxmitpriv->tx_drop++;
 373                         //dev_kfree_skb_any(skb);
 374                         return _FALSE;  // Caller shall tx this multicast frame via normal way.
 375                 }
 376         }
 377
 378         dev_kfree_skb_any(skb);
 379         return _TRUE;
 380 }
 381 #endif  // CONFIG_TX_MCAST2UNI
 382
 383
 384 int rtw_xmit_entry(_pkt *pkt, _nic_hdl pnetdev)
 385 {
 386         _adapter *padapter = (_adapter *)rtw_netdev_priv(pnetdev);
 387         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 388 #ifdef CONFIG_TX_MCAST2UNI
 389         struct mlme_priv        *pmlmepriv = &padapter->mlmepriv;
 390         extern int rtw_mc2u_disable;
 391 #endif  // CONFIG_TX_MCAST2UNI
 392         s32 res = 0;
 393 #if (LINUX_VERSION_CODE>=KERNEL_VERSION(2,6,35))
 394         u16 queue;
 395 #endif
 396
 397 _func_enter_;
 398
 399         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("+xmit_enry\n"));
 400
 401         if (rtw_if_up(padapter) == _FALSE) {
 402                 RT_TRACE(_module_xmit_osdep_c_, _drv_err_, ("rtw_xmit_entry: rtw_if_up fail\n"));
 403                 #ifdef DBG_TX_DROP_FRAME
 404                 DBG_8723A("DBG_TX_DROP_FRAME %s if_up fail\n", __FUNCTION__);
 405                 #endif
 406                 goto drop_packet;
 407         }
 408
 409         rtw_check_xmit_resource(padapter, pkt);
 410
 411 #ifdef CONFIG_TX_MCAST2UNI
 412         if ( !rtw_mc2u_disable
 413                 && check_fwstate(pmlmepriv, WIFI_AP_STATE) == _TRUE
 414                 && ( IP_MCAST_MAC(pkt->data)
 415                         || ICMPV6_MCAST_MAC(pkt->data) )
 416                 && (padapter->registrypriv.wifi_spec == 0)
 417                 )
 418         {
 419                 if ( pxmitpriv->free_xmitframe_cnt > (NR_XMITFRAME/4) ) {
 420                         res = rtw_mlcst2unicst(padapter, pkt);
 421                         if (res == _TRUE) {
 422                                 goto exit;
 423                         }
 424                 } else {
 425                         //DBG_8723A("Stop M2U(%d, %d)! ", pxmitpriv->free_xmitframe_cnt, pxmitpriv->free_xmitbuf_cnt);
 426                         //DBG_8723A("!m2u );
 427                 }
 428         }
 429 #endif  // CONFIG_TX_MCAST2UNI
 430
 431         res = rtw_xmit(padapter, &pkt);
 432         if (res < 0) {
 433                 #ifdef DBG_TX_DROP_FRAME
 434                 DBG_8723A("DBG_TX_DROP_FRAME %s rtw_xmit fail\n", __FUNCTION__);
 435                 #endif
 436                 goto drop_packet;
 437         }
 438
 439         pxmitpriv->tx_pkts++;
 440         RT_TRACE(_module_xmit_osdep_c_, _drv_info_, ("rtw_xmit_entry: tx_pkts=%d\n", (u32)pxmitpriv->tx_pkts));
 441         goto exit;
 442
 443 drop_packet:
 444         pxmitpriv->tx_drop++;
 445         dev_kfree_skb_any(pkt);
 446         RT_TRACE(_module_xmit_osdep_c_, _drv_notice_, ("rtw_xmit_entry: drop, tx_drop=%d\n", (u32)pxmitpriv->tx_drop));
 447
 448 exit:
 449
 450 _func_exit_;
 451
 452         return 0;
 453 }
 454