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 = precvframe->u.hdr.pkt = NULL;
  48         return _SUCCESS;
  49 }
  50
  51 /*alloc os related resource in struct recv_buf*/
  52 int r8712_os_recvbuf_resource_alloc(struct _adapter *padapter,
  53                                     struct recv_buf *precvbuf)
  54 {
  55         int res = _SUCCESS;
  56
  57         precvbuf->irp_pending = false;
  58         precvbuf->purb = usb_alloc_urb(0, GFP_KERNEL);
  59         if (precvbuf->purb == NULL)
  60                 res = _FAIL;
  61         precvbuf->pskb = NULL;
  62         precvbuf->reuse = false;
  63         precvbuf->pallocated_buf = NULL;
  64         precvbuf->pbuf = NULL;
  65         precvbuf->pdata = NULL;
  66         precvbuf->phead = NULL;
  67         precvbuf->ptail = NULL;
  68         precvbuf->pend = NULL;
  69         precvbuf->transfer_len = 0;
  70         precvbuf->len = 0;
  71         return res;
  72 }
  73
  74 /*free os related resource in struct recv_buf*/
  75 int r8712_os_recvbuf_resource_free(struct _adapter *padapter,
  76                              struct recv_buf *precvbuf)
  77 {
  78         if (precvbuf->pskb)
  79                 dev_kfree_skb_any(precvbuf->pskb);
  80         if (precvbuf->purb) {
  81                 usb_kill_urb(precvbuf->purb);
  82                 usb_free_urb(precvbuf->purb);
  83         }
  84         return _SUCCESS;
  85 }
  86
  87 void r8712_handle_tkip_mic_err(struct _adapter *padapter, u8 bgroup)
  88 {
  89         union iwreq_data wrqu;
  90         struct iw_michaelmicfailure ev;
  91         struct mlme_priv *pmlmepriv  = &padapter->mlmepriv;
  92
  93         memset(&ev, 0x00, sizeof(ev));
  94         if (bgroup)
  95                 ev.flags |= IW_MICFAILURE_GROUP;
  96         else
  97                 ev.flags |= IW_MICFAILURE_PAIRWISE;
  98         ev.src_addr.sa_family = ARPHRD_ETHER;
  99         memcpy(ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[0], ETH_ALEN);
 100         memset(&wrqu, 0x00, sizeof(wrqu));
 101         wrqu.data.length = sizeof(ev);
 102         wireless_send_event(padapter->pnetdev, IWEVMICHAELMICFAILURE, &wrqu,
 103                             (char *)&ev);
 104 }
 105
 106 void r8712_recv_indicatepkt(struct _adapter *padapter,
 107                             union recv_frame *precv_frame)
 108 {
 109         struct recv_priv *precvpriv;
 110         struct  __queue *pfree_recv_queue;
 111         _pkt *skb;
 112         struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
 113
 114         precvpriv = &(padapter->recvpriv);
 115         pfree_recv_queue = &(precvpriv->free_recv_queue);
 116         skb = precv_frame->u.hdr.pkt;
 117         if (skb == NULL)
 118                 goto _recv_indicatepkt_drop;
 119         skb->data = precv_frame->u.hdr.rx_data;
 120 #ifdef NET_SKBUFF_DATA_USES_OFFSET
 121         skb->tail = (sk_buff_data_t)(precv_frame->u.hdr.rx_tail -
 122                      precv_frame->u.hdr.rx_head);
 123 #else
 124         skb->tail = (sk_buff_data_t)precv_frame->u.hdr.rx_tail;
 125 #endif
 126         skb->len = precv_frame->u.hdr.len;
 127         if ((pattrib->tcpchk_valid == 1) && (pattrib->tcp_chkrpt == 1))
 128                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 129         else
 130                 skb->ip_summed = CHECKSUM_NONE;
 131         skb->dev = padapter->pnetdev;
 132         skb->protocol = eth_type_trans(skb, padapter->pnetdev);
 133         netif_rx(skb);
 134         precv_frame->u.hdr.pkt = NULL; /* pointers to NULL before
 135                                         * r8712_free_recvframe() */
 136         r8712_free_recvframe(precv_frame, pfree_recv_queue);
 137         return;
 138 _recv_indicatepkt_drop:
 139          /*enqueue back to free_recv_queue*/
 140          if (precv_frame)
 141                 r8712_free_recvframe(precv_frame, pfree_recv_queue);
 142          precvpriv->rx_drop++;
 143 }
 144
 145 void r8712_os_read_port(struct _adapter *padapter, struct recv_buf *precvbuf)
 146 {
 147         struct recv_priv *precvpriv = &padapter->recvpriv;
 148
 149         precvbuf->ref_cnt--;
 150         /*free skb in recv_buf*/
 151         dev_kfree_skb_any(precvbuf->pskb);
 152         precvbuf->pskb = NULL;
 153         precvbuf->reuse = false;
 154         if (precvbuf->irp_pending == false)
 155                 r8712_read_port(padapter, precvpriv->ff_hwaddr, 0,
 156                          (unsigned char *)precvbuf);
 157 }
 158
 159 static void _r8712_reordering_ctrl_timeout_handler (void *FunctionContext)
 160 {
 161         struct recv_reorder_ctrl *preorder_ctrl =
 162                          (struct recv_reorder_ctrl *)FunctionContext;
 163
 164         r8712_reordering_ctrl_timeout_handler(preorder_ctrl);
 165 }
 166
 167 void r8712_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl)
 168 {
 169         struct _adapter *padapter = preorder_ctrl->padapter;
 170
 171         _init_timer(&(preorder_ctrl->reordering_ctrl_timer), padapter->pnetdev,
 172                     _r8712_reordering_ctrl_timeout_handler, preorder_ctrl);
 173 }