drivers/staging/rtl8712/recv_linux.c

   1 /******************************************************************************
   2  * recv_linux.c
   3  *
   4  * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
   5  * Linux device driver for RTL8192SU
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along with
  17  * this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  19  *
  20  * Modifications for inclusion into the Linux staging tree are
  21  * Copyright(c) 2010 Larry Finger. All rights reserved.
  22  *
  23  * Contact information:
  24  * WLAN FAE <wlanfae@realtek.com>.
  25  * Larry Finger <Larry.Finger@lwfinger.net>
  26  *
  27  ******************************************************************************/
  28
  29 #define _RECV_OSDEP_C_
  30
  31 #include <linux/usb.h>
  32
  33 #include "osdep_service.h"
  34 #include "drv_types.h"
  35 #include "wifi.h"
  36 #include "recv_osdep.h"
  37 #include "osdep_intf.h"
  38 #include "ethernet.h"
  39 #include <linux/if_arp.h>
  40 #include "usb_ops.h"
  41
  42 /*init os related resource in struct recv_priv*/
  43 /*alloc os related resource in union recv_frame*/
  44 int r8712_os_recv_resource_alloc(struct _adapter *padapter,
  45                                  union recv_frame *precvframe)
  46 {
  47         precvframe->u.hdr.pkt_newalloc = NULL;
  48         precvframe->u.hdr.pkt = NULL;
  49         return _SUCCESS;
  50 }
  51
  52 /*alloc os related resource in struct recv_buf*/
  53 int r8712_os_recvbuf_resource_alloc(struct _adapter *padapter,
  54                                     struct recv_buf *precvbuf)
  55 {
  56         int res = _SUCCESS;
  57
  58         precvbuf->irp_pending = false;
  59         precvbuf->purb = usb_alloc_urb(0, GFP_KERNEL);
  60         if (!precvbuf->purb)
  61                 res = _FAIL;
  62         precvbuf->pskb = NULL;
  63         precvbuf->reuse = false;
  64         precvbuf->pallocated_buf = NULL;
  65         precvbuf->pbuf = NULL;
  66         precvbuf->pdata = NULL;
  67         precvbuf->phead = NULL;
  68         precvbuf->ptail = NULL;
  69         precvbuf->pend = NULL;
  70         precvbuf->transfer_len = 0;
  71         precvbuf->len = 0;
  72         return res;
  73 }
  74
  75 /*free os related resource in struct recv_buf*/
  76 int r8712_os_recvbuf_resource_free(struct _adapter *padapter,
  77                              struct recv_buf *precvbuf)
  78 {
  79         if (precvbuf->pskb)
  80                 dev_kfree_skb_any(precvbuf->pskb);
  81         if (precvbuf->purb) {
  82                 usb_kill_urb(precvbuf->purb);
  83                 usb_free_urb(precvbuf->purb);
  84         }
  85         return _SUCCESS;
  86 }
  87
  88 void r8712_handle_tkip_mic_err(struct _adapter *padapter, u8 bgroup)
  89 {
  90         union iwreq_data wrqu;
  91         struct iw_michaelmicfailure ev;
  92         struct mlme_priv *pmlmepriv  = &padapter->mlmepriv;
  93
  94         memset(&ev, 0x00, sizeof(ev));
  95         if (bgroup)
  96                 ev.flags |= IW_MICFAILURE_GROUP;
  97         else
  98                 ev.flags |= IW_MICFAILURE_PAIRWISE;
  99         ev.src_addr.sa_family = ARPHRD_ETHER;
 100         ether_addr_copy(ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[0]);
 101         memset(&wrqu, 0x00, sizeof(wrqu));
 102         wrqu.data.length = sizeof(ev);
 103         wireless_send_event(padapter->pnetdev, IWEVMICHAELMICFAILURE, &wrqu,
 104                             (char *)&ev);
 105 }
 106
 107 void r8712_recv_indicatepkt(struct _adapter *padapter,
 108                             union recv_frame *precv_frame)
 109 {
 110         struct recv_priv *precvpriv;
 111         struct  __queue *pfree_recv_queue;
 112         _pkt *skb;
 113         struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
 114
 115         precvpriv = &(padapter->recvpriv);
 116         pfree_recv_queue = &(precvpriv->free_recv_queue);
 117         skb = precv_frame->u.hdr.pkt;
 118         if (!skb)
 119                 goto _recv_indicatepkt_drop;
 120         skb->data = precv_frame->u.hdr.rx_data;
 121         skb->len = precv_frame->u.hdr.len;
 122         skb_set_tail_pointer(skb, skb->len);
 123         if ((pattrib->tcpchk_valid == 1) && (pattrib->tcp_chkrpt == 1))
 124                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 125         else
 126                 skb->ip_summed = CHECKSUM_NONE;
 127         skb->dev = padapter->pnetdev;
 128         skb->protocol = eth_type_trans(skb, padapter->pnetdev);
 129         netif_rx(skb);
 130         precv_frame->u.hdr.pkt = NULL; /* pointers to NULL before
 131                                         * r8712_free_recvframe()
 132                                         */
 133         r8712_free_recvframe(precv_frame, pfree_recv_queue);
 134         return;
 135 _recv_indicatepkt_drop:
 136          /*enqueue back to free_recv_queue*/
 137         if (precv_frame)
 138                 r8712_free_recvframe(precv_frame, pfree_recv_queue);
 139         precvpriv->rx_drop++;
 140 }
 141
 142 static void _r8712_reordering_ctrl_timeout_handler (unsigned long data)
 143 {
 144         struct recv_reorder_ctrl *preorder_ctrl =
 145                          (struct recv_reorder_ctrl *)data;
 146
 147         r8712_reordering_ctrl_timeout_handler(preorder_ctrl);
 148 }
 149
 150 void r8712_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl)
 151 {
 152         setup_timer(&preorder_ctrl->reordering_ctrl_timer,
 153                      _r8712_reordering_ctrl_timeout_handler,
 154                      (unsigned long)preorder_ctrl);
 155 }