LXR linux/drivers/staging/rtl8712/recv

   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*/
  44int 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*/
  53int 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->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*/
  75int 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
  87void 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        ether_addr_copy(ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[0]);
 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
 106void 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)
 118                goto _recv_indicatepkt_drop;
 119        skb->data = precv_frame->u.hdr.rx_data;
 120        skb->len = precv_frame->u.hdr.len;
 121        skb_set_tail_pointer(skb, skb->len);
 122        if ((pattrib->tcpchk_valid == 1) && (pattrib->tcp_chkrpt == 1))
 123                skb->ip_summed = CHECKSUM_UNNECESSARY;
 124        else
 125                skb->ip_summed = CHECKSUM_NONE;
 126        skb->dev = padapter->pnetdev;
 127        skb->protocol = eth_type_trans(skb, padapter->pnetdev);
 128        netif_rx(skb);
 129        precv_frame->u.hdr.pkt = NULL; /* pointers to NULL before
 130                                        * r8712_free_recvframe()
 131                                        */
 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
 141static void _r8712_reordering_ctrl_timeout_handler (unsigned long data)
 142{
 143        struct recv_reorder_ctrl *preorder_ctrl =
 144                         (struct recv_reorder_ctrl *)data;
 145
 146        r8712_reordering_ctrl_timeout_handler(preorder_ctrl);
 147}
 148
 149void r8712_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl)
 150{
 151        setup_timer(&preorder_ctrl->reordering_ctrl_timer,
 152                     _r8712_reordering_ctrl_timeout_handler,
 153                     (unsigned long)preorder_ctrl);
 154}
 155