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 = kzalloc(alloc_sz, GFP_KERNEL);
 140         if (pxmitbuf->pallocated_buf == NULL) {
 141                 return _FAIL;
 142         }
 143
 144         pxmitbuf->pbuf = (u8 *)N_BYTE_ALIGMENT((SIZE_PTR)(pxmitbuf->pallocated_buf), XMITBUF_ALIGN_SZ);
 145         pxmitbuf->dma_transfer_addr = 0;
 146
 147 #endif // CONFIG_USE_USB_BUFFER_ALLOC_TX
 148
 149         for(i=0; i<8; i++)
 150         {
 151                 pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
 152                 if(pxmitbuf->pxmit_urb[i] == NULL)
 153                 {
 154                         DBG_8723A("pxmitbuf->pxmit_urb[i]==NULL");
 155                         return _FAIL;
 156                 }
 157
 158         }
 159 #endif
 160 #if defined(CONFIG_PCI_HCI) || defined(CONFIG_SDIO_HCI) || defined(CONFIG_GSPI_HCI)
 161         pxmitbuf->pallocated_buf = kzalloc(alloc_sz);
 162         if (pxmitbuf->pallocated_buf == NULL) {
 163                 return _FAIL;
 164         }
 165
 166         pxmitbuf->pbuf = (u8 *)N_BYTE_ALIGMENT((SIZE_PTR)(pxmitbuf->pallocated_buf), XMITBUF_ALIGN_SZ);
 167 #endif
 168
 169         return _SUCCESS;
 170 }
 171
 172 void rtw_os_xmit_resource_free(_adapter *padapter, struct xmit_buf *pxmitbuf,u32 free_sz)
 173 {
 174 #ifdef CONFIG_USB_HCI
 175         int i;
 176         struct dvobj_priv       *pdvobjpriv = adapter_to_dvobj(padapter);
 177         struct usb_device       *pusbd = pdvobjpriv->pusbdev;
 178
 179
 180         for(i=0; i<8; i++)
 181         {
 182                 if(pxmitbuf->pxmit_urb[i])
 183                 {
 184                         //usb_kill_urb(pxmitbuf->pxmit_urb[i]);
 185                         usb_free_urb(pxmitbuf->pxmit_urb[i]);
 186                 }
 187         }
 188
 189 #ifdef CONFIG_USE_USB_BUFFER_ALLOC_TX
 190         rtw_usb_buffer_free(pusbd, (size_t)free_sz, pxmitbuf->pallocated_buf, pxmitbuf->dma_transfer_addr);
 191         pxmitbuf->pallocated_buf =  NULL;
 192         pxmitbuf->dma_transfer_addr = 0;
 193 #else   // CONFIG_USE_USB_BUFFER_ALLOC_TX
 194         if(pxmitbuf->pallocated_buf)
 195                 rtw_mfree(pxmitbuf->pallocated_buf, free_sz);
 196 #endif  // CONFIG_USE_USB_BUFFER_ALLOC_TX
 197
 198 #endif
 199 #if defined(CONFIG_PCI_HCI) || defined(CONFIG_SDIO_HCI) || defined(CONFIG_GSPI_HCI)
 200         if(pxmitbuf->pallocated_buf)
 201                 rtw_mfree(pxmitbuf->pallocated_buf, free_sz);
 202 #endif
 203 }
 204
 205 #define WMM_XMIT_THRESHOLD      (NR_XMITFRAME*2/5)
 206
 207 void rtw_os_pkt_complete(_adapter *padapter, _pkt *pkt)
 208 {
 209 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 210         u16     queue;
 211         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 212
 213         queue = skb_get_queue_mapping(pkt);
 214         if (padapter->registrypriv.wifi_spec) {
 215                 if(__netif_subqueue_stopped(padapter->pnetdev, queue) &&
 216                         (pxmitpriv->hwxmits[queue].accnt < WMM_XMIT_THRESHOLD))
 217                 {
 218                         netif_wake_subqueue(padapter->pnetdev, queue);
 219                 }
 220         } else {
 221                 if(__netif_subqueue_stopped(padapter->pnetdev, queue))
 222                         netif_wake_subqueue(padapter->pnetdev, queue);
 223         }
 224 #else
 225         if (netif_queue_stopped(padapter->pnetdev))
 226                 netif_wake_queue(padapter->pnetdev);
 227 #endif
 228
 229         dev_kfree_skb_any(pkt);
 230 }
 231
 232 void rtw_os_xmit_complete(_adapter *padapter, struct xmit_frame *pxframe)
 233 {
 234         if(pxframe->pkt)
 235         {
 236                 //RT_TRACE(_module_xmit_osdep_c_,_drv_err_,("linux : rtw_os_xmit_complete, dev_kfree_skb()\n"));
 237
 238                 //dev_kfree_skb_any(pxframe->pkt);
 239                 rtw_os_pkt_complete(padapter, pxframe->pkt);
 240
 241         }
 242
 243         pxframe->pkt = NULL;
 244 }
 245
 246 void rtw_os_xmit_schedule(_adapter *padapter)
 247 {
 248         _adapter *pri_adapter = padapter;
 249
 250 #if defined(CONFIG_SDIO_HCI) || defined(CONFIG_GSPI_HCI)
 251         if(!padapter)
 252                 return;
 253
 254 #ifdef CONFIG_CONCURRENT_MODE
 255         if(padapter->adapter_type > PRIMARY_ADAPTER)
 256                 pri_adapter = padapter->pbuddy_adapter;
 257 #endif
 258
 259         if (_rtw_queue_empty(&pri_adapter->xmitpriv.pending_xmitbuf_queue) == _FALSE)
 260                 _rtw_up_sema(&pri_adapter->xmitpriv.xmit_sema);
 261
 262
 263 #else
 264         _irqL  irqL;
 265         struct xmit_priv *pxmitpriv;
 266
 267         if(!padapter)
 268                 return;
 269
 270         pxmitpriv = &padapter->xmitpriv;
 271
 272         _enter_critical_bh(&pxmitpriv->lock, &irqL);
 273
 274         if(rtw_txframes_pending(padapter))
 275         {
 276                 tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
 277         }
 278
 279         _exit_critical_bh(&pxmitpriv->lock, &irqL);
 280 #endif
 281 }
 282
 283 static void rtw_check_xmit_resource(_adapter *padapter, _pkt *pkt)
 284 {
 285         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 286 #if (LINUX_VERSION_CODE>=KERNEL_VERSION(2,6,35))
 287         u16     queue;
 288
 289         queue = skb_get_queue_mapping(pkt);
 290         if (padapter->registrypriv.wifi_spec) {
 291                 /* No free space for Tx, tx_worker is too slow */
 292                 if (pxmitpriv->hwxmits[queue].accnt > WMM_XMIT_THRESHOLD) {
 293                         //DBG_8723A("%s(): stop netif_subqueue[%d]\n", __FUNCTION__, queue);
 294                         netif_stop_subqueue(padapter->pnetdev, queue);
 295                 }
 296         } else {
 297                 if(pxmitpriv->free_xmitframe_cnt<=4) {
 298                         if (!netif_tx_queue_stopped(netdev_get_tx_queue(padapter->pnetdev, queue)))
 299                                 netif_stop_subqueue(padapter->pnetdev, queue);
 300                 }
 301         }
 302 #else
 303         if(pxmitpriv->free_xmitframe_cnt<=4)
 304         {
 305                 if (!rtw_netif_queue_stopped(padapter->pnetdev))
 306                         rtw_netif_stop_queue(padapter->pnetdev);
 307         }
 308 #endif
 309 }
 310
 311 #ifdef CONFIG_TX_MCAST2UNI
 312 int rtw_mlcst2unicst(_adapter *padapter, struct sk_buff *skb)
 313 {
 314         struct  sta_priv *pstapriv = &padapter->stapriv;
 315         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 316         _irqL   irqL;
 317         _list   *phead, *plist;
 318         struct sk_buff *newskb;
 319         struct sta_info *psta = NULL;
 320         u8 chk_alive_num = 0;
 321         char chk_alive_list[NUM_STA];
 322         u8 bc_addr[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 323         u8 null_addr[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 324
 325         int i;
 326         s32     res;
 327
 328         _enter_critical_bh(&pstapriv->asoc_list_lock, &irqL);
 329         phead = &pstapriv->asoc_list;
 330         plist = get_next(phead);
 331
 332         //free sta asoc_queue
 333         while ((rtw_end_of_queue_search(phead, plist)) == _FALSE) {
 334                 int stainfo_offset;
 335                 psta = LIST_CONTAINOR(plist, struct sta_info, asoc_list);
 336                 plist = get_next(plist);
 337
 338                 stainfo_offset = rtw_stainfo_offset(pstapriv, psta);
 339                 if (stainfo_offset_valid(stainfo_offset)) {
 340                         chk_alive_list[chk_alive_num++] = stainfo_offset;
 341                 }
 342         }
 343         _exit_critical_bh(&pstapriv->asoc_list_lock, &irqL);
 344
 345         for (i = 0; i < chk_alive_num; i++) {
 346                 psta = rtw_get_stainfo_by_offset(pstapriv, chk_alive_list[i]);
 347                 if(!(psta->state &_FW_LINKED))
 348                         continue;
 349
 350                 /* avoid come from STA1 and send back STA1 */
 351                 if (_rtw_memcmp(psta->hwaddr, &skb->data[6], 6) == _TRUE
 352                         || _rtw_memcmp(psta->hwaddr, null_addr, 6) == _TRUE
 353                         || _rtw_memcmp(psta->hwaddr, bc_addr, 6) == _TRUE
 354                 )
 355                         continue;
 356
 357                 newskb = skb_copy(skb, GFP_ATOMIC);
 358
 359                 if (newskb) {
 360                         _rtw_memcpy(newskb->data, psta->hwaddr, 6);
 361                         res = rtw_xmit(padapter, &newskb);
 362                         if (res < 0) {
 363                                 DBG_8723A("%s()-%d: rtw_xmit() return error!\n", __FUNCTION__, __LINE__);
 364                                 pxmitpriv->tx_drop++;
 365                                 dev_kfree_skb_any(newskb);
 366                         } else
 367                                 pxmitpriv->tx_pkts++;
 368                 } else {
 369                         DBG_8723A("%s-%d: skb_copy() failed!\n", __FUNCTION__, __LINE__);
 370                         pxmitpriv->tx_drop++;
 371                         //dev_kfree_skb_any(skb);
 372                         return _FALSE;  // Caller shall tx this multicast frame via normal way.
 373                 }
 374         }
 375
 376         dev_kfree_skb_any(skb);
 377         return _TRUE;
 378 }
 379 #endif  // CONFIG_TX_MCAST2UNI
 380
 381
 382 int rtw_xmit_entry(_pkt *pkt, _nic_hdl pnetdev)
 383 {
 384         _adapter *padapter = (_adapter *)rtw_netdev_priv(pnetdev);
 385         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 386 #ifdef CONFIG_TX_MCAST2UNI
 387         struct mlme_priv        *pmlmepriv = &padapter->mlmepriv;
 388         extern int rtw_mc2u_disable;
 389 #endif  // CONFIG_TX_MCAST2UNI
 390         s32 res = 0;
 391 #if (LINUX_VERSION_CODE>=KERNEL_VERSION(2,6,35))
 392         u16 queue;
 393 #endif
 394
 395 _func_enter_;
 396
 397         RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("+xmit_enry\n"));
 398
 399         if (rtw_if_up(padapter) == _FALSE) {
 400                 RT_TRACE(_module_xmit_osdep_c_, _drv_err_, ("rtw_xmit_entry: rtw_if_up fail\n"));
 401                 #ifdef DBG_TX_DROP_FRAME
 402                 DBG_8723A("DBG_TX_DROP_FRAME %s if_up fail\n", __FUNCTION__);
 403                 #endif
 404                 goto drop_packet;
 405         }
 406
 407         rtw_check_xmit_resource(padapter, pkt);
 408
 409 #ifdef CONFIG_TX_MCAST2UNI
 410         if ( !rtw_mc2u_disable
 411                 && check_fwstate(pmlmepriv, WIFI_AP_STATE) == _TRUE
 412                 && ( IP_MCAST_MAC(pkt->data)
 413                         || ICMPV6_MCAST_MAC(pkt->data) )
 414                 && (padapter->registrypriv.wifi_spec == 0)
 415                 )
 416         {
 417                 if ( pxmitpriv->free_xmitframe_cnt > (NR_XMITFRAME/4) ) {
 418                         res = rtw_mlcst2unicst(padapter, pkt);
 419                         if (res == _TRUE) {
 420                                 goto exit;
 421                         }
 422                 } else {
 423                         //DBG_8723A("Stop M2U(%d, %d)! ", pxmitpriv->free_xmitframe_cnt, pxmitpriv->free_xmitbuf_cnt);
 424                         //DBG_8723A("!m2u );
 425                 }
 426         }
 427 #endif  // CONFIG_TX_MCAST2UNI
 428
 429         res = rtw_xmit(padapter, &pkt);
 430         if (res < 0) {
 431                 #ifdef DBG_TX_DROP_FRAME
 432                 DBG_8723A("DBG_TX_DROP_FRAME %s rtw_xmit fail\n", __FUNCTION__);
 433                 #endif
 434                 goto drop_packet;
 435         }
 436
 437         pxmitpriv->tx_pkts++;
 438         RT_TRACE(_module_xmit_osdep_c_, _drv_info_, ("rtw_xmit_entry: tx_pkts=%d\n", (u32)pxmitpriv->tx_pkts));
 439         goto exit;
 440
 441 drop_packet:
 442         pxmitpriv->tx_drop++;
 443         dev_kfree_skb_any(pkt);
 444         RT_TRACE(_module_xmit_osdep_c_, _drv_notice_, ("rtw_xmit_entry: drop, tx_drop=%d\n", (u32)pxmitpriv->tx_drop));
 445
 446 exit:
 447
 448 _func_exit_;
 449
 450         return 0;
 451 }