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 "osdep_service.h"
  32 #include "drv_types.h"
  33 #include "wifi.h"
  34 #include "recv_osdep.h"
  35 #include "osdep_intf.h"
  36 #include "usb_ops.h"
  37
  38 /*init os related resource in struct recv_priv*/
  39 /*alloc os related resource in union recv_frame*/
  40 int r8712_os_recv_resource_alloc(struct _adapter *padapter,
  41                                  union recv_frame *precvframe)
  42 {
  43         precvframe->u.hdr.pkt_newalloc = precvframe->u.hdr.pkt = NULL;
  44         return _SUCCESS;
  45 }
  46
  47 /*alloc os related resource in struct recv_buf*/
  48 int r8712_os_recvbuf_resource_alloc(struct _adapter *padapter,
  49                                     struct recv_buf *precvbuf)
  50 {
  51         int res = _SUCCESS;
  52
  53         precvbuf->irp_pending = false;
  54         precvbuf->purb = _usb_alloc_urb(0, GFP_KERNEL);
  55         if (precvbuf->purb == NULL)
  56                 res = _FAIL;
  57         precvbuf->pskb = NULL;
  58         precvbuf->reuse = false;
  59         precvbuf->pallocated_buf = NULL;
  60         precvbuf->pbuf = NULL;
  61         precvbuf->pdata = NULL;
  62         precvbuf->phead = NULL;
  63         precvbuf->ptail = NULL;
  64         precvbuf->pend = NULL;
  65         precvbuf->transfer_len = 0;
  66         precvbuf->len = 0;
  67         return res;
  68 }
  69
  70 /*free os related resource in struct recv_buf*/
  71 int r8712_os_recvbuf_resource_free(struct _adapter *padapter,
  72                              struct recv_buf *precvbuf)
  73 {
  74         if (precvbuf->pskb)
  75                 dev_kfree_skb_any(precvbuf->pskb);
  76         if (precvbuf->purb) {
  77                 usb_kill_urb(precvbuf->purb);
  78                 usb_free_urb(precvbuf->purb);
  79         }
  80         return _SUCCESS;
  81 }
  82
  83 void r8712_handle_tkip_mic_err(struct _adapter *padapter, u8 bgroup)
  84 {
  85         union iwreq_data wrqu;
  86         struct iw_michaelmicfailure ev;
  87         struct mlme_priv *pmlmepriv  = &padapter->mlmepriv;
  88
  89         memset(&ev, 0x00, sizeof(ev));
  90         if (bgroup)
  91                 ev.flags |= IW_MICFAILURE_GROUP;
  92         else
  93                 ev.flags |= IW_MICFAILURE_PAIRWISE;
  94         ev.src_addr.sa_family = ARPHRD_ETHER;
  95         memcpy(ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[0], ETH_ALEN);
  96         memset(&wrqu, 0x00, sizeof(wrqu));
  97         wrqu.data.length = sizeof(ev);
  98         wireless_send_event(padapter->pnetdev, IWEVMICHAELMICFAILURE, &wrqu,
  99                             (char *)&ev);
 100 }
 101
 102 void r8712_recv_indicatepkt(struct _adapter *padapter,
 103                             union recv_frame *precv_frame)
 104 {
 105         struct recv_priv *precvpriv;
 106         struct  __queue *pfree_recv_queue;
 107         _pkt *skb;
 108         struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
 109
 110         precvpriv = &(padapter->recvpriv);
 111         pfree_recv_queue = &(precvpriv->free_recv_queue);
 112         skb = precv_frame->u.hdr.pkt;
 113         if (skb == NULL)
 114                 goto _recv_indicatepkt_drop;
 115         skb->data = precv_frame->u.hdr.rx_data;
 116 #ifdef NET_SKBUFF_DATA_USES_OFFSET
 117         skb->tail = (sk_buff_data_t)(precv_frame->u.hdr.rx_tail -
 118                      precv_frame->u.hdr.rx_head);
 119 #else
 120         skb->tail = (sk_buff_data_t)precv_frame->u.hdr.rx_tail;
 121 #endif
 122         skb->len = precv_frame->u.hdr.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         r8712_free_recvframe(precv_frame, pfree_recv_queue);
 133         return;
 134 _recv_indicatepkt_drop:
 135          /*enqueue back to free_recv_queue*/
 136          if (precv_frame)
 137                 r8712_free_recvframe(precv_frame, pfree_recv_queue);
 138          precvpriv->rx_drop++;
 139 }
 140
 141 void r8712_os_read_port(struct _adapter *padapter, struct recv_buf *precvbuf)
 142 {
 143         struct recv_priv *precvpriv = &padapter->recvpriv;
 144
 145         precvbuf->ref_cnt--;
 146         /*free skb in recv_buf*/
 147         dev_kfree_skb_any(precvbuf->pskb);
 148         precvbuf->pskb = NULL;
 149         precvbuf->reuse = false;
 150         if (precvbuf->irp_pending == false)
 151                 r8712_read_port(padapter, precvpriv->ff_hwaddr, 0,
 152                          (unsigned char *)precvbuf);
 153 }
 154
 155 static void _r8712_reordering_ctrl_timeout_handler (void *FunctionContext)
 156 {
 157         struct recv_reorder_ctrl *preorder_ctrl =
 158                          (struct recv_reorder_ctrl *)FunctionContext;
 159
 160         r8712_reordering_ctrl_timeout_handler(preorder_ctrl);
 161 }
 162
 163 void r8712_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl)
 164 {
 165         struct _adapter *padapter = preorder_ctrl->padapter;
 166
 167         _init_timer(&(preorder_ctrl->reordering_ctrl_timer), padapter->pnetdev,
 168                     _r8712_reordering_ctrl_timeout_handler, preorder_ctrl);
 169 }